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Table of Contents
How to Turn on Responsive Design Mode
Common uses and operation suggestions
Tips for debugging
Notes and FAQs
Home Computer Tutorials Browser How to use responsive design mode in Safari?

How to use responsive design mode in Safari?

Jul 18, 2025 am 12:59 AM
safari Responsive design

To open Safari's responsive design mode, you must first open the "Development" menu: go to "Preferences" → "Advanced" → check "Show the 'Development' menu in the menu bar", then click the "Development" menu and select "Enter Responsive Design Mode", or use the shortcut key Command Option R; common uses include dragging the edge to adjust the viewport size, selecting preset device size, switching horizontal and vertical screens, enabling touch simulation, and viewing the current viewport width and height; during debugging, you can combine the element inspector and network panel to edit the DOM and style in real time, and monitor resource loading; precautions include that this mode only simulates the viewport size, does not support certain mobile APIs, some dynamic loading resources may not be loaded immediately, and only supported by macOS version.

How to use responsive design mode in Safari?

Responsive Design Mode is used in Safari browser, mainly to test the display effect of web pages under different device sizes. This function is very practical for front-end developers or website debugging, and the operation is not complicated.

How to use responsive design mode in Safari?

How to Turn on Responsive Design Mode

To use responsive design mode, you must first open the Safari "Development" menu. By default, this menu is hidden and needs to be set manually:

  • Open Safari → Go to Preferences → Switch to the Advanced tab
  • Check "Show 'Development' menu in the menu bar"

When enabled, the "Development" option will appear in the top menu bar. Click it and select "Enter Responsive Design Mode" (or Enter Responsive Design Mode in English).

How to use responsive design mode in Safari?

The shortcut key is Command Option R (on Mac).

Common uses and operation suggestions

Once you enter responsive design mode, you will see a page view with the device size control bar. You can drag the edge to change the viewport size, or you can select common device sizes (such as iPhone, iPad, various Android models, etc.) from the drop-down menu.

How to use responsive design mode in Safari?
  • Supports horizontal screen/vertical screen switching, which is convenient for viewing layout performance in different directions.
  • Touch simulation can be enabled to test the behavior of touch events
  • The address bar will display the width and height value of the current viewport, which is convenient for debugging media query breakpoints.

If you modify CSS or HTML during debugging, these changes are temporary and refresh the page will be restored to its original state.

Tips for debugging

In responsive design mode, it can be used in conjunction with other developer tools, such as element inspector and network panel:

  • Click the "Development" menu → "Show JavaScript Console" or "Show Element Inspector"
  • Use the Element Inspector to view and edit DOMs and styles directly
  • You can observe the loading of resources in the "Network" panel, especially whether the image is loaded correctly according to the viewport

Sometimes you will find that an element is misaligned on the small screen, and then using the element inspector to locate the problem the fastest. for example:

 <div class="nav" style="width: 100px;"></div>

If a fixed width is set, it may exceed the viewport range under the small screen, resulting in a confusing layout.

Notes and FAQs

There are a few things that are easy to overlook when using responsive design patterns:

  • It just simulates viewport size and is not exactly equivalent to real device behavior
  • Some mobile-specific APIs (such as geographic location, camera) cannot be tested here
  • If you use dynamic loading scripts or lazy loading images, some resources may not be loaded immediately

If you find that some styles are not effective, it is recommended to clear the cache first and then reload the page. In addition, Safari's responsive design mode currently only supports macOS versions, and Safari on iOS does not have this feature.

Basically that's it. Although the function is not particularly powerful, it is enough for daily debugging.

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