to enter your own coordinates, or select Location unavailable to test out how your page behaves when geolocation is in an error state. Select one of the presets from the Location list, or select Other. Or press Command+Shift+P (Mac) or Control+Shift+P (Windows, Linux, Chrome OS) to open the Command Menu, type Sensors, and then select Show Sensors. To open the geolocation overriding UI click Customize and control DevTools and then select More tools > Sensors.
Setting network throttling from the Performance panel # Override geolocation Click Capture Settings and then select Fast 3G or Slow 3G from the Network list.įigure 21. You can also set network throttling from the Performance panel. Or press Command+Shift+P (Mac) or Control+Shift+P (Windows, Linux, Chrome OS) to open the Command Menu, type 3G, and select Enable fast 3G throttling or Enable slow 3G throttling. To throttle the network only and not the CPU, go the Network panel and select Fast 3G or Slow 3G from the Throttle list. To throttle the CPU only and not the network, go to the Performance panel, click Capture Settings, and then select 4x slowdown or 6x slowdown from the CPU list.įigure 18. The Device Toolbar # Throttle the CPU only Note that the Throttle list will be hidden if your Device Toolbar is narrow.įigure 17. Keep in mind that the throttling is relative to the normal capability of your laptop or desktop. Low-end mobile simulates slow 3G and throttles your CPU 6 times slower than normal. Mid-tier mobile simulates fast 3G and throttles your CPU so that it is 4 times slower than normal.
To throttle the network and CPU, select Mid-tier mobile or Low-end mobile from the Throttle list. Rulers above and to the left of the viewport # Zoom the viewportįigure 15. The sizing unit of the rulers is pixels.įigure 14. The device type field is the list that is set to Mobile by default.Ĭlick More options and then select Show rulers to see rulers above and to the left of your viewport. The device pixel ratio, user agent string, and device type fields are optional. The device frame for the iPhone 6 # Add a custom mobile deviceĬlick the Device list and then select Edit.Įnter a name, width, and height for the device. Note: If you don't see a device frame for a particular device, it probably means that DevTools just doesn't have art for that specific option.įigure 10.
Events fired refers to whether the page fires touch or click events when you interact with the page. Cursor icon refers to what type of cursor you see when you hover over the page. Rendering method refers to whether Chrome renders the page as a mobile or desktop viewport. The table below describes the differences between the options. Use the Device Type list to simulate a mobile device or desktop device. Click a breakpoint to change the viewport's width # Set the device type To show media query breakpoints above your viewport, click More options and then select Show media queries.Ĭlick a breakpoint to change the viewport's width so that the breakpoint gets triggered.įigure 4. The handles for changing the viewport's dimensions when in Responsive Viewport Mode # Show media queries In Figure 2, the width is set to 628 and the height is set to 662.įigure 2. Or, enter specific values in the width and height boxes. # Responsive Viewport Modeĭrag the handles to resize the viewport to whatever dimensions you need. # Simulate a mobile viewportĬlick Toggle Device Toolbar to open the UI that enables you to simulate a mobile viewport.īy default the Device Toolbar opens in Responsive Viewport Mode.
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Use Remote Debugging to view, change, debug, and profile a page's code from your laptop or desktop while it actually runs on a mobile device. When in doubt, your best bet is to actually run your page on a mobile device. For example, the architecture of mobile CPUs is very different than the architecture of laptop or desktop CPUs. There are some aspects of mobile devices that DevTools will never be able to simulate. You simulate the mobile user experience from your laptop or desktop. With Device Mode you don't actually run your code on a mobile device.
Think of Device Mode as a first-order approximation of how your page looks and feels on a mobile device. Use Device Mode to approximate how your page looks and performs on a mobile device.ĭevice Mode is the name for the loose collection of features in Chrome DevTools that help you simulate mobile devices.
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