how to access safari developer tools

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How to turn on the develop menu in safari on mac.

The Develop menu lets you view page source in Safari on Mac.

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How to enable the develop menu in safari on mac, how to view page source in safari on mac.

When you right-click on any web page in Safari on Mac, it doesn't reveal the Show Page Source and Inspect Element buttons. To see these, you need to enable the Develop menu---we'll show you how to do that.

Once you've enabled the Develop menu, right-clicking a blank space on any website will reveal the Inspect Element and Show Page Source buttons. These allow you to take a look at the source code of any website, which is useful for things like downloading images from websites and debugging code or finding out what it looks like behind any site (for website designers).

You can easily turn on the Develop menu in Safari by following a couple of steps. Open Safari on your Mac and click the "Safari" button in the menu bar.

Next, select "Preferences." Alternatively, you can use the keyboard shortcut Command+, (comma). This will also open up Safari preferences.

Go to the "Advanced" tab.

Check the box for "Show Develop Menu in Menu Bar."

Now the Develop menu will appear between Bookmarks and Window at the top.

Apart from being able to view the page source, this will allow you to access developer-focused features, such as disabling JavaScript on any website.

Once you've enabled the Develop menu, there are a couple of ways to view the page source in Safari.

Open any website in Safari and right-click the blank space on the page. Now, select "Show Page Source." You can also get to this menu by using the keyboard shortcut Option+Command+u.

If you're looking for images or other media elements from any web page, Safari makes it easy to find these. In the left-hand pane, you will see various folders such as Images, Fonts, etc. Click the "Images" folder to quickly find the photos that you need.

After selecting an image, you can view its details easily by opening up the details sidebar. The button to open this is located at the top-right of the console, just below the gear icon. You can also open this with the shortcut Option+Command+0.

Click "Resource" at the top of the details sidebar to view details, such as the size of the image and its full URL.

You can change the position of the page source console easily, too. There are two buttons at the top-left of this console, right next to the X button. Click the rectangle icon to move the console to a different side within the browser window.

If you'd like to open the page source console in a separate window, you can click the two-rectangles icon. This will detach the console and open it in a separate window.

To check out the code for any specific element on the page, you can right-click that element and select "Inspect Element." This will take you directly to the code for the element that you selected.

Whenever you're done looking at the code, click the X button to close the page source console and return to browsing on Safari. You can also check out how to view a website's page source in Google Chrome  here.

Related: How to View the HTML Source in Google Chrome

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Use the developer tools in the Develop menu in Safari on Mac

If you’re a web developer, the Safari Develop menu provides tools you can use to make sure your website works well with all standards-based web browsers.

If you don’t see the Develop menu in the menu bar , choose Safari > Settings, click Advanced, then select “Show features for web developers”.

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How to Activate the iPhone Debug Console or Web Inspector

Use Safari's web developer tools to study problematic websites

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What to Know

• Activate Web Inspector on iOS: Go to Settings > Safari > Advanced and move the Web Inspector toggle switch to the On position.
• Use Web Inspector on macOS: Connect your iOS device to a Mac and choose the URL to inspect from the Develop menu.

If you run into a bug or another issue with a website on Safari mobile, use the Web Inspector tool to investigate. This article explains how to use the Safari console for iPhone to debug errors with the help of your Mac computer. Instructions apply to iPhones with iOS 14, iOS 12, or iOS 11, and well as Macs with macOS Big Sur (11.0), macOS Catalina (10.15), or macOS Mojave (10.14).

Activate Web Inspector on Your iPhone or Other iOS Device

The Web Inspector is disabled by default since most iPhone users have no use for it. However, if you're a developer or you're curious, you can activate it in a few short steps. Here's how:

Open the iPhone  Settings  menu.

On an iPhone with an early version of iOS, access the Debug Console through Settings > Safari > Developer > Debug Console . When Safari on the iPhone detects CSS, HTML, and JavaScript errors, details of each display in the debugger.

Scroll down and tap  Safari  to open the screen that contains everything related to the Safari web browser on your iPhone, iPad, or iPod touch.

Scroll to the bottom of the page and select Advanced .

Move the Web Inspector toggle switch to the On position.

Connect Your iOS Device to Safari on a Mac

To use the Web Inspector, connect your iPhone or another iOS device to a Mac that has the Safari web browser and enable the Develop menu .

With Safari open, select Safari from the menu bar and choose  Preferences .

Select the  Advanced  tab.

Select the Show Develop menu in menu bar check box and close the settings window.

From the Safari menu bar, select Develop and choose the name of your attached iOS device, then select the URL that appears under Safari to open the debug console for that site.

After you connect your device, use your Mac to inspect the website you want to debug and have it open in the Safari mobile browser.

What Is Web Inspector?

Web developers use Web Inspector to modify, debug, and optimize websites on Macs and iOS devices. With Web Inspector open, developers can inspect the resources on a web page. The Web Inspector window contains editable HTML and notes regarding the styles and layers of the web page in a separate panel.

Before iOS 6, the iPhone Safari web browser had a built-in Debug Console that developers used to find web page defects. Recent versions of iOS use Web Inspector instead.

With Safari 9 and OS X Mavericks (10.9), Apple introduced Responsive Design Mode in Web Inspector. Developers use this built-in simulator to preview how web pages scale to different screen sizes, resolutions, and orientations.

To set up Web Inspector on your iPad, open your iPad's Settings and select Safari > Advanced , then turn Web Inspector On . Connect the iPad to a Mac computer, then open Safari on the Mac and select Safari > Preferences > Advanced , then turn on Show Develop menu in menu bar .

You cannot just connect your iPhone to a Windows PC and start using Web Inspector through Chrome like you can with a Mac. Installing package manager software can provide you a sort of workaround, but it's not recommended unless you're familiar with the package management app you intend to use.

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How To Get Developer Tools In Safari

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Introduction

Safari, the sleek and innovative web browser developed by Apple, is known for its user-friendly interface and seamless integration with Apple devices. While Safari offers a smooth browsing experience for users, it also provides powerful tools for web developers to create and optimize websites and web applications. One of the key features that sets Safari apart is its built-in Developer Tools, which offer a comprehensive set of resources for web development and debugging.

Whether you are a seasoned web developer or just starting out, having access to Safari's Developer Tools can significantly enhance your workflow and productivity. These tools enable you to inspect and modify web page elements, debug JavaScript, analyze network activity, and optimize website performance, among other capabilities. By leveraging Safari's Developer Tools, you can gain valuable insights into the structure and behavior of web pages, identify and troubleshoot issues, and fine-tune the performance of your web projects.

In this article, we will delve into the process of enabling and utilizing Safari's Developer Tools for web development. We will explore the various features and functionalities offered by these tools, providing practical insights and tips for leveraging them effectively. Whether you are a web developer, designer, or simply curious about the inner workings of websites, this guide will equip you with the knowledge and skills to harness the full potential of Safari's Developer Tools.

Let's embark on a journey to uncover the hidden gems of Safari's Developer Tools and unlock the power of web development within the confines of this innovative browser . Whether you're seeking to enhance your web development skills or gain a deeper understanding of web technologies, Safari's Developer Tools are your gateway to a world of possibilities. So, without further ado, let's dive into the realm of web development with Safari as our trusted companion.

Enabling Developer Tools in Safari

Enabling Safari's Developer Tools is a straightforward process that unlocks a treasure trove of functionalities for web development. Whether you're a seasoned developer or a curious enthusiast, accessing these tools can significantly enhance your web development experience within the Safari browser .

To enable Developer Tools in Safari, follow these simple steps:

Open Safari Preferences : Launch Safari and navigate to the "Safari" menu located in the top-left corner of the screen. From the drop-down menu, select "Preferences."

Access Advanced Settings : In the Preferences window, click on the "Advanced" tab. This will reveal a set of advanced settings for Safari.

Enable Develop Menu : Within the Advanced tab, locate the option labeled "Show Develop menu in menu bar" and ensure that it is checked. This action activates the Develop menu, which houses a plethora of web development tools and features.

Verify the Development Menu : After enabling the Develop menu, you should see it appear in the menu bar at the top of the screen, alongside other Safari menu options.

Once you have completed these steps, Safari's Developer Tools will be readily accessible, empowering you to delve into the intricacies of web development and gain valuable insights into the structure and behavior of web pages.

By enabling Developer Tools in Safari, you gain access to a suite of powerful resources that can elevate your web development capabilities. From inspecting and modifying web page elements to analyzing network activity and optimizing website performance, Safari's Developer Tools provide a comprehensive toolkit for enhancing your web projects.

With Developer Tools at your fingertips, you are poised to embark on an enriching journey through the realms of web development, armed with the tools and insights needed to create, optimize, and fine-tune captivating web experiences within the Safari browser.

Using Developer Tools for Web Development

Safari's Developer Tools offer a robust set of features and functionalities that empower web developers to streamline their workflows, troubleshoot issues, and optimize web projects. By leveraging these tools, developers can gain valuable insights into the inner workings of web pages and applications, ultimately enhancing the user experience and performance of their creations.

Inspecting and Modifying Web Page Elements

One of the fundamental capabilities of Safari's Developer Tools is the ability to inspect and modify web page elements in real time. By right-clicking on any element within a web page and selecting "Inspect Element," developers can access a detailed view of the HTML and CSS properties associated with that element. This feature is invaluable for understanding the structure and styling of web pages, allowing developers to make on-the-fly adjustments and see the immediate impact on the page layout.

Debugging JavaScript and Analyzing Console Output

Safari's Developer Tools include a robust JavaScript debugger, enabling developers to identify and resolve issues within their JavaScript code. By setting breakpoints, stepping through code, and examining variable values, developers can pinpoint and troubleshoot errors, ultimately improving the functionality and reliability of their web applications. Additionally, the console within Developer Tools provides a space for logging messages, errors, and warnings, offering valuable insights into the runtime behavior of JavaScript code.

Network Analysis and Performance Testing

Another powerful aspect of Safari's Developer Tools is the network panel, which allows developers to analyze network activity and optimize the performance of web pages. By monitoring network requests, loading times, and resource sizes, developers can identify opportunities for optimization, such as minimizing file sizes, leveraging caching strategies, and reducing unnecessary network requests. This capability is instrumental in creating fast and efficient web experiences for users across various devices and network conditions.

Modifying and Testing CSS in Real Time

Safari's Developer Tools provide a seamless environment for modifying and testing CSS styles directly within the browser. Developers can experiment with different styles, colors, and layouts, observing the immediate effects on web page elements. This real-time feedback accelerates the design and development process, allowing developers to fine-tune the visual presentation of their websites with precision and agility.

Leveraging Additional Tools and Resources

In addition to the aforementioned features, Safari's Developer Tools offer a wide array of resources, including the Elements panel for inspecting and editing the DOM, the Application panel for managing web storage and service workers, and the Security panel for identifying potential security vulnerabilities within web applications. These tools collectively provide a comprehensive toolkit for web developers, empowering them to create secure, performant, and visually compelling web experiences.

By harnessing the power of Safari's Developer Tools, web developers can elevate their skills, optimize their workflows, and deliver exceptional web experiences to users. Whether you are fine-tuning the layout of a responsive website, debugging complex JavaScript interactions, or optimizing the performance of a web application, Safari's Developer Tools are your indispensable companions in the journey of web development.

Inspecting and Debugging Web Pages

Inspecting and debugging web pages is a fundamental aspect of web development, and Safari's Developer Tools provide a robust set of features for this purpose. When it comes to understanding the structure and behavior of web pages, as well as identifying and resolving issues, the inspection and debugging capabilities within Safari's Developer Tools are indispensable.

Inspecting Web Page Elements

The ability to inspect web page elements is a cornerstone of Safari's Developer Tools. By right-clicking on any element within a web page and selecting "Inspect Element," developers can access a detailed view of the HTML and CSS properties associated with that element. This feature provides a comprehensive breakdown of the selected element, including its position, dimensions, styling, and any associated event listeners. This level of insight allows developers to gain a deep understanding of the composition and layout of web page elements, facilitating precise modifications and optimizations.

Modifying Web Page Elements in Real Time

In addition to inspecting web page elements, Safari's Developer Tools enable developers to modify elements in real time. By directly editing the HTML and CSS properties of elements within the Elements panel, developers can experiment with different styles, content, and layouts, observing the immediate impact on the web page. This real-time editing capability is invaluable for fine-tuning the visual presentation of web pages and rapidly iterating on design and layout changes.

Safari's Developer Tools include a powerful JavaScript debugger, which allows developers to identify and resolve issues within their JavaScript code. By setting breakpoints, stepping through code, and examining variable values, developers can pinpoint and troubleshoot errors, ultimately improving the functionality and reliability of their web applications. Additionally, the console within Developer Tools provides a space for logging messages, errors, and warnings, offering valuable insights into the runtime behavior of JavaScript code. This feature is instrumental in diagnosing and addressing JavaScript-related issues, ensuring the smooth execution of interactive and dynamic web elements.

In essence, Safari's Developer Tools provide a comprehensive suite of capabilities for inspecting and debugging web pages. From gaining insights into the structure and styling of web page elements to identifying and resolving JavaScript-related issues, these tools empower developers to create, optimize, and fine-tune web experiences with precision and efficiency. By leveraging the inspection and debugging features within Safari's Developer Tools, developers can elevate their skills, streamline their workflows, and deliver exceptional web experiences to users.

Modifying and Testing CSS and JavaScript

Modifying and testing CSS and JavaScript is a crucial aspect of web development, and Safari's Developer Tools offer a seamless environment for making real-time adjustments and testing code changes. Whether you're refining the visual presentation of a website or fine-tuning the functionality of interactive elements, Safari's Developer Tools provide a comprehensive toolkit for working with CSS and JavaScript.

Real-time CSS Modifications

Safari's Developer Tools allow developers to modify CSS styles directly within the browser, providing immediate feedback on the visual appearance of web page elements. By accessing the Styles panel, developers can experiment with different styles, colors, and layouts, observing the instant effects on the web page. This real-time editing capability accelerates the design and development process, enabling developers to iterate on visual enhancements with agility and precision.

Testing JavaScript Code

In addition to CSS modifications, Safari's Developer Tools facilitate the testing and debugging of JavaScript code. The JavaScript debugger within Developer Tools empowers developers to set breakpoints, step through code, and inspect variable values, facilitating the identification and resolution of JavaScript-related issues. By leveraging the debugging capabilities, developers can ensure the reliability and functionality of interactive elements, such as dynamic user interfaces and client-side interactions.

Performance Optimization

Furthermore, Safari's Developer Tools provide insights into the performance of CSS and JavaScript code. Developers can analyze the impact of CSS styles and JavaScript functions on web page loading times and responsiveness, identifying opportunities for optimization. By monitoring the execution of CSS and JavaScript, developers can fine-tune code to enhance the overall performance and user experience of web applications.

In summary, Safari's Developer Tools offer a comprehensive suite of features for modifying and testing CSS and JavaScript. From real-time CSS adjustments to JavaScript debugging and performance optimization, these tools empower developers to create visually compelling and functionally robust web experiences. By harnessing the capabilities within Safari's Developer Tools, developers can refine the presentation and behavior of web pages with precision, ensuring an exceptional user experience across various devices and platforms.

Network analysis and performance testing are critical components of web development, and Safari's Developer Tools provide a robust set of features for evaluating the network activity and optimizing the performance of web pages and applications.

Monitoring Network Activity

Safari's Developer Tools offer a comprehensive Network panel, which allows developers to monitor and analyze the network activity associated with a web page. This includes tracking network requests, such as HTTP requests for resources like HTML, CSS, JavaScript, images, and other assets. By examining the network waterfall, developers can gain insights into the timing and sequence of network requests, identifying potential bottlenecks and optimizing the loading process.

Resource Size and Loading Times

The Network panel within Safari's Developer Tools provides detailed information about the size and loading times of individual resources. Developers can assess the impact of resource sizes on web page performance, identifying opportunities to optimize assets for faster loading. By analyzing the loading times of resources, developers can prioritize critical content and streamline the delivery of essential assets, ultimately enhancing the overall user experience.

Safari's Developer Tools empower developers to optimize the performance of web pages by identifying and addressing potential performance bottlenecks. By leveraging the insights from the Network panel, developers can implement strategies to minimize file sizes, leverage browser caching, and reduce unnecessary network requests. Additionally, developers can assess the efficiency of third-party integrations and external resources, ensuring that web pages load quickly and responsively across various devices and network conditions.

Network Throttling

One of the standout features of Safari's Developer Tools is the ability to simulate different network conditions using network throttling. Developers can emulate various network environments, such as 3G , 4G, or slower connections, to assess the performance of web pages under different bandwidth constraints. This capability enables developers to optimize web pages for a wide range of network conditions, ensuring a consistent and reliable user experience for diverse audiences.

In essence, Safari's Developer Tools provide a comprehensive suite of capabilities for network analysis and performance testing. By monitoring network activity, assessing resource sizes and loading times, optimizing web page performance, and simulating network conditions, developers can create fast, efficient, and responsive web experiences. Leveraging the insights and tools within Safari's Developer Tools, developers can fine-tune the performance of web pages, ultimately delivering exceptional user experiences in the ever-evolving landscape of the web.

In conclusion, Safari's Developer Tools serve as a gateway to the intricate world of web development, offering a rich array of features and functionalities that empower developers to create, optimize, and fine-tune web experiences with precision and efficiency. By enabling and leveraging these tools, developers gain valuable insights into the structure, behavior, and performance of web pages, ultimately enhancing the user experience and functionality of their web projects.

From inspecting and modifying web page elements to debugging JavaScript, analyzing network activity, and optimizing performance, Safari's Developer Tools provide a comprehensive toolkit for addressing the diverse challenges of web development. The seamless integration of real-time editing, debugging, and performance analysis within the browser environment streamlines the development process, allowing developers to iterate on design and functionality with agility and precision.

Furthermore, the ability to simulate network conditions and assess the impact of resource sizes on web page performance equips developers with the tools needed to create fast, efficient, and responsive web experiences across various devices and network environments. This capability is instrumental in ensuring a consistent and reliable user experience, regardless of the user's location or network conditions.

By harnessing the power of Safari's Developer Tools, developers can elevate their skills, optimize their workflows, and deliver exceptional web experiences to users. Whether it's refining the visual presentation of a website, debugging complex JavaScript interactions, or optimizing the performance of a web application, Safari's Developer Tools are indispensable companions in the journey of web development.

In essence, Safari's Developer Tools not only provide a window into the inner workings of web pages but also empower developers to craft immersive, performant, and visually compelling web experiences. As the web continues to evolve, Safari's Developer Tools stand as a testament to Apple's commitment to providing developers with the resources and capabilities needed to thrive in the dynamic landscape of web development.

In the ever-expanding digital ecosystem, Safari's Developer Tools remain a steadfast ally for developers, offering a robust platform for innovation, creativity, and excellence in web development. Whether you're a seasoned developer or an aspiring enthusiast, Safari's Developer Tools invite you to embark on a journey of discovery and mastery, shaping the future of the web one line of code at a time.

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How to Open Safari Developer Tools & Enable Mobile View Mode

John on May 12, 2021

In this tutorial, we will learn how to open the Safari developer console and enable mobile view for responsive web development.

How to Enable Safari Developer Tools

If you don't have developer tools enabled in Safari, you will need to do this before the console can be opened by using the following steps:

• From the main menu go to Safari > Preferences (or use the CMD + , keyboard shortcut.)
• Go to the Advanced tab.
• Check "Show Developer menu in menu bar"

Open the Safari Developer Console

Now open the developer console in responsive mode by going to the menu and selecting Develop > Enter Responsive Design Mode :

Alternatively, use the keyboard shortcut CTRL + CMD + R to enter responsive developer mode.

Now you can work on your website in a variety of different mobile device screen sizes by selecting them at the top of the page:

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How to Use Developer Tools on Safari

It's free and super easy to set up

If you're a web developer or designer working on Mac, Safari is a browser that you cannot ignore. It's the most used browser on Mac, and it is fully featured with all the necessary tools to help developers design and debug their web pages. Most importantly, Safari has a built-in set of developer tools that are available from the moment you install it, making it convenient and efficient for developers to find, inspect, and modify elements of their webpage. In this article, we'll look at how to use developer tools on Safari, step by step.

Enabling Developer Tools in Safari

Developing websites and applications requires the use of developer tools, which allow you to inspect and modify code, debug errors, and optimize performance. If you're using Safari as your browser, you'll need to enable developer tools before you can start using them. Here's how:

Accessing Safari Preferences

To access Safari Preferences, you have two options. You can either click on Safari from the top menu bar and then click Preferences, or you can use the keyboard shortcut Command + , (comma). Either way, you'll end up in the same place.

Once you're in Safari Preferences, you'll see a variety of tabs at the top of the window. Click on the one that says "Advanced".

Activating the Develop Menu

In the Advanced tab, you'll see a checkbox that says "Show Develop menu in the menu bar". Check this box to enable the Develop menu.

Now that you've enabled the Develop menu, you'll see it in the top menu bar, between Bookmarks and Window. Click on it to see the various options available to you.

Some of the most commonly used options in the Develop menu include:

Inspect Element: This allows you to view and modify the HTML and CSS of a page.

Console: This displays any error messages or other output from the JavaScript console.

Network: This shows you the resources that are being loaded by the page, including images, scripts, and stylesheets.

Debugger: This lets you step through JavaScript code and set breakpoints to help you find and fix errors.

By using these developer tools, you'll be able to create more efficient and effective websites and applications. Happy developing!

Navigating the Developer Tools Interface

Once you have enabled developer tools, you can access them by clicking on the Develop menu and selecting Show Web Inspector. This will open the developer tool interface with several panels:

Elements Panel

The Elements panel is a powerful tool for web developers. It allows you to see the HTML and CSS for the currently selected element on the page. You can use this panel to select and inspect individual elements, modify page elements, and edit styles. You can even add new HTML elements and see how they affect the page layout. The Elements panel is an essential tool for anyone who wants to understand how a web page is constructed.

Network Panel

The Network panel is another important tool for web developers. It shows information about any requests made by the page, including the URL, status, size, and timing. This is useful for debugging performance issues and checking how a page loads. You can use the Network panel to identify slow-loading resources, optimize page speed, and troubleshoot network issues.

Sources Panel

The Sources panel shows you the JavaScript files associated with the page and allows you to debug them. You can set breakpoints, step through code, and inspect variables. This is useful for troubleshooting JavaScript errors and optimizing code performance. You can also use the Sources panel to edit JavaScript code and see how it affects the page behavior.

Timeline Panel

The Timeline panel shows you a timeline of how the page loads performance-wise. It can be used to identify slow-loading resources or laggy scripts. You can see exactly when each resource is loaded and how long it takes. The Timeline panel is a great tool for optimizing page speed and improving user experience.

Console Panel

The Console panel is where you can access the browser's JavaScript console. You can execute JavaScript code in the context of the page and view debug messages and errors. This is useful for troubleshooting JavaScript issues, testing code snippets, and experimenting with new features. You can also use the Console panel to log messages and interact with the page in real-time.

Storage Panel

The Storage panel shows you the various types of storage present on a page, such as cookies, local storage, and session storage. It can be used to debug issues related to handling client-side storage. You can view, edit, and delete storage data, as well as monitor storage usage. The Storage panel is a great tool for understanding how client-side storage works and how to optimize it.

Overall, the developer tools interface is a powerful set of tools that can help you understand and optimize your web pages. Whether you're a beginner or an experienced developer, these tools are essential for building high-quality web applications.

Inspecting and Modifying HTML and CSS

Selecting elements.

Using the Elements panel, you can select an HTML element by clicking on it in the panel or directly on the page. When you select an element, you'll see its HTML and CSS properties on the right-hand side of the panel.

Editing HTML

You can easily edit the HTML of an element, either by double-clicking on the HTML code you want to change or by right-clicking on the HTML code and choosing "Edit as HTML". Then, you can make the necessary changes and save them.

Modifying CSS Styles

Similarly, you can modify CSS styles of an element in the Styles section of the panel. To add a new style, click the "+ New Style Rule" button. To modify an existing style, simply click on it and make the necessary changes.

Adding and Removing Classes

You can also add or remove classes from an element in the Elements panel. To add a class, select the element and add the class name in the "class" field. To remove a class, simply delete its name from the "class" field.

In conclusion, Safari's developer tools are an essential toolset for designers and web developers. They offer a wide range of features that make debugging and designing a webpage accessible and efficient. With this article, you should have a basic understanding of how to use developer tools on Safari. Experiment with the tools and explore their full potential to make your web development experience more productive and enjoyable.

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What are browser developer tools?

Every modern web browser includes a powerful suite of developer tools. These tools do a range of things, from inspecting currently-loaded HTML, CSS and JavaScript to showing which assets the page has requested and how long they took to load. This article explains how to use the basic functions of your browser's devtools.

Note: Before you run through the examples below, open the Beginner's example site that we built during the Getting started with the Web article series. You should have this open as you follow the steps below.

How to open the devtools in your browser

The devtools live inside your browser in a subwindow that looks roughly like this, depending on what browser you are using:

How do you pull it up? Three ways:

• Windows: Ctrl + Shift + I or F12
• macOS: ⌘ + ⌥ + I

• Chrome: More tools ➤ Developer tools
• Safari: Develop ➤ Show Web Inspector. If you can't see the Develop menu, go to Safari ➤ Preferences ➤ Advanced , and check the Show Develop menu in menu bar checkbox.
• Opera : Developer ➤ Developer tools
• Context menu: Press-and-hold/right-click an item on a webpage (Ctrl-click on the Mac), and choose Inspect Element from the context menu that appears. ( An added bonus: this method straight-away highlights the code of the element you right-clicked.)

The Inspector: DOM explorer and CSS editor

The developer tools usually open by default to the inspector, which looks something like the following screenshot. This tool shows what the HTML on your page looks like at runtime, as well as what CSS is applied to each element on the page. It also allows you to instantly modify the HTML and CSS and see the results of your changes reflected live in the browser viewport.

If you don't see the inspector,

• Tap/click the Inspector tab.
• In Chrome, Microsoft Edge, or Opera, tap/click Elements.
• In Safari, the controls are not so clearly presented, but you should see the HTML if you haven't selected something else to appear in the window. Press the Style button to see the CSS.

Exploring the DOM inspector

For a start, right-click (Ctrl-click) an HTML element in the DOM inspector and look at the context menu. The available menu options vary among browsers, but the important ones are mostly the same:

• Delete Node (sometimes Delete Element ). Deletes the current element.
• Edit as HTML (sometimes Add attribute / Edit text ). Lets you change the HTML and see the results on the fly. Very useful for debugging and testing.
• :hover/:active/:focus . Forces element states to be toggled on, so you can see what their styling would look like.
• Copy/Copy as HTML . Copy the currently selected HTML.
• Some browsers also have Copy CSS Path and Copy XPath available, to allow you to copy the CSS selector or XPath expression that would select the current HTML element.

Try editing some of your DOM now. Double-click an element, or right-click it and choose Edit as HTML from the context menu. You can make any changes you'd like, but you cannot save your changes.

Exploring the CSS editor

By default, the CSS editor displays the CSS rules applied to the currently selected element:

These features are especially handy:

• The rules applied to the current element are shown in order of most-to-least-specific.
• Click the checkboxes next to each declaration to see what would happen if you removed the declaration.
• Click the little arrow next to each shorthand property to show the property's longhand equivalents.
• Click a property name or value to bring up a text box, where you can key in a new value to get a live preview of a style change.
• Next to each rule is the file name and line number the rule is defined in. Clicking that rule causes the dev tools to jump to show it in its own view, where it can generally be edited and saved.
• You can also click the closing curly brace of any rule to bring up a text box on a new line, where you can write a completely new declaration for your page.

You'll notice a number of clickable tabs at the top of the CSS Viewer:

• Computed : This shows the computed styles for the currently selected element (the final, normalized values that the browser applies).
• Box Model : represents visually the current element's box model, so you can see at a glance what padding, border and margin is applied to it, and how big its content is.
• Grid : If the page you are inspecting uses CSS Grid, this section allows you to view the grid details.
• Fonts : In Firefox, the Fonts tab shows the fonts applied to the current element.

Find out more

Find out more about the Inspector in different browsers:

• Firefox Page inspector
• Chrome DOM inspector (Opera's inspector works the same as this)
• Safari DOM inspector and style explorer

The JavaScript debugger

The JavaScript debugger allows you to watch the value of variables and set breakpoints, places in your code that you want to pause execution and identify the problems that prevent your code from executing properly.

To get to the debugger:

Chrome : Open the Developer tools and then select the Sources tab. (Opera works the same way.)

Safari : Open the Developer Tools and then select the Debugger tab.

Exploring the debugger

There are three panes in the JavaScript Debugger on Firefox.

The first pane on the left contains the list of files associated with the page you are debugging. Select the file you want to work with from this list. Click on a file to select it and view its contents in the center pane of the Debugger.

Source code

Set breakpoints where you want to pause execution. In the following image, the highlight on the number 18 shows that the line has a breakpoint set.

Watch expressions and breakpoints

The right-hand pane shows a list of the watch expressions you have added and breakpoints you have set.

In the image, the first section, Watch expressions , shows that the listItems variable has been added. You can expand the list to view the values in the array.

The next section, Breakpoints , lists the breakpoints set on the page. In example.js, a breakpoint has been set on the statement listItems.push(inputNewItem.value);

The final two sections only appear when the code is running.

The Call stack section shows you what code was executed to get to the current line. You can see that the code is in the function that handles a mouse click, and that the code is currently paused on the breakpoint.

The final section, Scopes , shows what values are visible from various points within your code. For example, in the image below, you can see the objects available to the code in the addItemClick function.

Find out more about the JavaScript debugger in different browsers:

• Firefox JavaScript Debugger )
• Microsoft Edge Debugger
• Chrome Debugger
• Safari Debugger

The JavaScript console

The JavaScript console is an incredibly useful tool for debugging JavaScript that isn't working as expected. It allows you to run lines of JavaScript against the page currently loaded in the browser, and reports the errors encountered as the browser tries to execute your code. To access the console in any browser:

If the developer tools are already open, click or press the Console tab.

This will give you a window like the following:

To see what happens, try entering the following snippets of code into the console one by one (and then pressing Enter):

Now try entering the following incorrect versions of the code and see what you get.

You'll start to see the kind of errors that the browser returns. Often these errors are fairly cryptic, but it should be pretty simple to figure these problems out!

Find out more about the JavaScript console in different browsers:

• Firefox Web Console
• Chrome JavaScript Console (Opera's inspector works the same as this)
• Safari Console
• Debugging HTML
• Debugging CSS

How to open the developer tools in a browser

The web developer tools included with most major Internet browsers are helpful for several reasons. For example, they can be utilized to debug code and test changes to HTML (hypertext markup language), CSS (cascading style sheets), and JavaScript in real time. To learn how to open developer tools, select a browser from the list below and follow the instructions.

Google Chrome

Mozilla firefox, microsoft edge, microsoft internet explorer.

• Open the Google Chrome browser.

• From the drop-down menu , move your mouse cursor over More tools , and select Developer tools from the expanded menu.
• You should now see a new section at the bottom of the screen containing the developer tools.

In Chrome, pressing F12 or Ctrl + Shift + I (or Command + option + I on a Mac) also brings up the interactive developer tools.

• Open the Mozilla Firefox browser.

• Click More tools on the drop-down menu and select Web Developer Tools from the expanded menu.

In Firefox, pressing F12 or Ctrl + Shift + I (or Command + option + I on a Mac) also brings up the interactive developer tools.

• Open the Microsoft Edge browser.

• Move your mouse cursor over More tools in the drop-down menu , and select Developer tools from the expanded menu.
• You should now see a new section on the right side of the screen containing the developer tools.

In Microsoft Edge, pressing F12 or Ctrl + Shift + I also brings up the interactive developer tools.

• Open the Internet Explorer browser.

• Select F12 Developer Tools from the drop-down menu .
• A new window should open containing the developer tools.

In Internet Explorer, pressing F12 also brings up the DOM (document object model) and developer tools menu window.

In Safari, the developer tools are not enabled by default. The following sections show you how to turn on this feature, and then how to access it.

Accessing developer options in Safari

• Open the Safari browser.

• Select Settings... from the drop-down menu .

• Click the Advanced tab , and check the box next to Show Develop menu in menu bar .

• You should now see the Develop selector in the Apple menu bar at the top of the screen.

• Click the Develop selector and choose Show Web Inspector from the drop-down menu .

Once the developer options are enabled, pressing Command + option + I also opens the developer tools.

• Open the Opera browser.

• Move your mouse cursor over Developer in the drop-down menu , and select Developer tools from the expanded menu.

In Opera, pressing F12 or Ctrl + Shift + I (or Command + option + I on a Mac) also brings up the interactive developer tools.

Related information

• How to view the HTML source code of a web page.
• How to copy something from a web page to my web page.
• HTML and web design help and support.

Product Area

Feature impact.

• How It Works
• Requirements for Mobile Publisher for Experience Cloud
• LWR Platform (Beta) Limitations
• Prepare Your App’s Information for Android
• Prepare Your App’s Information for iOS
• Create a Mobile Publisher Project
• Get Started with the Playground App
• Enable Cross-Website Tracking for the Publisher Playground App (iOS)
• Show or Hide Login Bar
• Playground App for Android
• Preview Your Experience Site on iOS (Simulator)
• Preview Your Experience Site on Android (Emulator)

Enable Safari Developer Tools

• Debug a Mobile Component (Safari)
• Enable Developer Mode on Your Emulated Device
• Debug a Mobile Component (Chrome)
• Test How URLs Open in the Playground Publisher App
• How to Check Your Experience Cloud Site URL
• Advantages of Binary Upload Distribution Method
• App Distribution Type Considerations
• Choose Distribution Type
• Create a Placeholder App
• Mobile Publisher Best Practices for App Content Declarations
• Update Test User Credentials
• Create Service Account User and Find Your Google Play Developer ID
• Grant Permission to Distribute Your Branded App
• Register Your Firebase App to Enable Mobile Publisher Android Push...
• Enter Your Information into Your Mobile Publisher Project for Android
• Register Salesforce Bundle ID
• Invite Salesforce to Your App Store Connect Account
• Record Your Apple Developer Team Account Info
• Enter Your Apple Developer Information into Your Mobile Publisher...
• Find Your Managed Google Play Organization Info
• Find Your Apple Deployment Programs Account Info
• Unlisted Option for iOS App Distribution
• Change Distribution Type for iOS
• Change Distribution Types for Android
• Change Distribution Account for iOS
• Change Distribution Account for Android
• Urge or Require Users to Update to the Latest Mobile Publisher App...
• Allow Experience Cloud App Users to Initiate Deletion of Their Data
• Configure App Navigation
• Set Up the Navigation Tab Bar
• Manage How URLs Open from Your App
• Creating a Custom Login Flow
• Set Up Your Android App for Google’s Privacy Policy Requirements
• Create a Privacy Policy Page in Experience Builder
• Create a Custom User Profile Menu Item for Your App’s Privacy Policy
• Add a Privacy Policy for Binary Uploads
• iPad Support Opt In
• Create a Certificate Signing Request
• Create Developer ID Certificate
• Find Your Certificate ID
• Configure Your Branded App with Apple
• Create an Apple Auth. Provider in Salesforce
• Update the Apple Configuration with the Callback URL
• Test the SSO Connection
• Create a Registration Handler
• Enable Advanced Authentication for a Mobile Publisher App
• Create a Support Case to Use Advanced Authentication for a Mobile...
• Test Your Mobile Publisher App’s Single Sign-On with Apple ID
• Set Time Value for Biometric ID App Unlock
• Pre-Authorize User App Access Through Connected App Policies
• Create Custom Notifications for Your App
• Test Marketing Cloud Push Notifications
• Enable Marketing Cloud Push Notifications for Mobile Publisher Apps
• Mobile Publisher Fields for Enabling Marketing Cloud Push...
• Create a Permission Set and Grant API Enabled Access (Optional)
• Enable Full Content Push Notifications for Experience Cloud App
• Enable App Permissions for Device Capabilities
• App Permissions on Android Devices
• Scan Barcodes with a Mobile Device Camera
• Implement and Use Location-Based Features
• Implement a Contact Import Feature
• Access the Mobile Device Calendar
• Best Practices and Guidelines for App Rating and Feedback Requests
• Identify a User with a Mobile Device’s Biometrics Capabilities
• Set Up URL Schemes
• Use App Links with Mobile Publisher for Experience Cloud (Android)
• Use Universal Links with Mobile Publisher for Experience Cloud (iOS)
• Override Android App Links to Your Mobile Publisher App
• Override iOS Universal Links to Your Mobile Publisher App
• Enable Cross-Website Tracking (iOS)
• App Tracking Transparency (iOS)
• Add a Smart App Banner
• Add a Pass to Apple Wallet (iOS Only)
• Supported Objects for Download
• About Managed Packages
• Request a Managed Package
• Install a Managed Package
• Request a Beta Version of Your App
• Test with the UI Test Automation Model (UTAM) for Your App
• Switch Between Testing Modes in the Experience Cloud App
• Submit the App for Approval
• Types of Maintenance
• Create a New Version of Your Mobile Publisher for Experience Cloud App
• Managed Package Maintenance
• Considerations Before Changing Your Experience Cloud Site URL
• Authentication
• Temporarily Remove Mobile Publisher Apps from Sale
• Decommission a Mobile Publisher App
• Suggestions to Prevent App Store and Play Store Rejections
• Identify the Version of Your Experience Cloud App
• Mobile Publisher for Experience Cloud FAQ
• Known Issues and Limitations for Mobile Publisher

Start the debugging process for your iOS app.

Required Editions

• On your desktop development machine, open Safari.
• Select Safari | Preferences .
• Select Advanced .
• Check the Show Develop menu in menu bar box. The Safari developer tools are now available from the Develop menu in the menu bar.

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Apple Releases Safari Technology Preview 193 With Bug Fixes and Performance Improvements

Apple today released a new update for Safari Technology Preview , the experimental browser Apple first introduced in March 2016. Apple designed the ‌Safari Technology Preview‌ to test features that may be introduced into future release versions of Safari.

The current ‌Safari Technology Preview‌ release is compatible with machines running macOS Ventura and macOS Sonoma , the latest version of macOS that Apple released in September 2023.

The ‌Safari Technology Preview‌ update is available through the Software Update mechanism in System Preferences or System Settings to anyone who has downloaded the browser . Full release notes for the update are available on the Safari Technology Preview website .

Apple's aim with ‌Safari Technology Preview‌ is to gather feedback from developers and users on its browser development process. ‌Safari Technology Preview‌ can run side-by-side with the existing Safari browser and while designed for developers, it does not require a developer account to download.

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Top Rated Comments

I'm always curious about these Safari Tech Preview posts. Are they just a quick way to add another headline? I suspect so, as I don't see many people trusting these builds as their daily driver. I've tried that in the past, but it never stuck.

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Revamped models with OLED displays, M3 chip, and redesigned Magic Keyboard accessory.

Updated 10.9-inch model and new 12.9-inch model, M2 chip expected.

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Expected to see new AI-focused features and more. Preview coming at WWDC in June with public release in September.

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How to access developer options on Amazon Fire TV?

T he Amazon Fire TV stick is among the best things you can buy to revive an aging TV. The Fire TV OS is packed with a lot of great features, and it's perfect to breathe a new life into your old TV by adding some smart features to it. The Fire TV stick's operating system comes with all the essential features you need out of the box, but there are a few advanced options that are hidden under developer options.

That's right, the Fire TV OS also has a hidden developer options menu like the one you have on Android phones . It includes an option that lets you sideload applications , along with some more advanced settings like ADB Debugging and Deep Sleep mode. You'll find these developer options on all Fire TV OS devices, including the Fire TV Stick 4K, Fire TV Stick Lite, Fire TV Cube, and even TVs that run Fire TV OS. If you are wondering how to get to these settings, then follow the step-by-step guide below.

Best media streaming devices in 2024

Similar to how you access developer settings on android.

Accessing the hidden developer options on Amazon Fire TV, as we mentioned previously, is fairly simple. Here's how to do it in a few simple steps.

• Select the gear icon on your Fire TV's home screen to open Settings .
• Go to My Fire TV , and select About .
• Highlight the first option on the list, which is usually your device's name, and press the action button on your remote seven times.
• You'll now see a message confirming "You are now a developer," and it'll unlock the developer options in the previous menu.

If you're using a Fire OS television, then step 2 may refer to Device & Software instead, but the rest of the steps are the same.

The menu will remain there permanently unless you happen to reset your Fire TV. In some cases, a major software version upgrade can also hide it again. In such cases, just perform the steps mentioned above once again to unlock the developer options.

Bonus: Accessing Fire TV's built-in developer tools menu

Apart from the aforementioned developer options (which are vaguely reminiscent of the Android base of Fire OS), Amazon also ships a standalone developer tools menu with its Android fork. However, it's primarily aimed at app developers, which means accessing the menu and tinkering with the options is not recommended unless you really know what you are doing.

To invoke this menu, pick one of the following methods:

• Press and hold the Center (aka Action ) button on your remote for a second, then, while holding down the Center button, press the Down button on the directional ring. After 3–4 seconds, release both buttons and press the Menu button.
• If you have the Amazon Fire Game Controller, then press and hold the A and Y buttons simultaneously for 5 seconds. Next, release the buttons and press the controller's Menu button.
• In case you have already configured ADB and your PC can communicate with the Fire TV, just run the following command: adb shell am start com.amazon.ssm/com.amazon.ssm.ControlPanel

Provided everything goes smoothly, you should see the built-in Developer Tools menu of Fire TV.

Developer options on the Fire TV are quite useful

The menu offers a myriad of features compared to the barebone developer options. The System X-Ray and Advanced Options toggles, for example, can be used to show instantaneous system metrics on top of the screen as an overlay. On the other hand, the Developer Options entry here is meant for turning on recommendations from all third-party apps installed by the user. You can take a look at the Amazon Fire TV developer documentation to learn more.

That’s all you need to do to access the developer options on any Fire TV device. For most people, the primary reason to even access this menu is to sideload third-party apps from unknown sources. While a number of these install-helper tools are in Amazon's store, you'll need to enable the necessary option for unknown sources before you can actually install anything with it.