Overview Open Chrome DevTools Simulate mobile devices with Device Mode Performance insights: Get actionable insights on your website's performance Lighthouse: Optimize website speed Animations: Inspect and modify CSS animation effects Changes: Track your HTML, CSS, and JavaScript changes Coverage: Find unused JavaScript and CSS CSS Overview: Identify potential CSS improvements Issues: Find and fix problems Media: View and debug media players information Memory Inspector: Inspect JavaScript ArrayBuffer Network conditions: Override the user agent string Recorder: Record, replay and measure user flows Security: Understand security issues WebAuthn: Emulate authenticators
Overview Open Chrome DevTools Simulate mobile devices with Device Mode Performance insights: Get actionable insights on your website's performance Lighthouse: Optimize website speed Animations: Inspect and modify CSS animation effects Changes: Track your HTML, CSS, and JavaScript changes Coverage: Find unused JavaScript and CSS CSS Overview: Identify potential CSS improvements Issues: Find and fix problems Media: View and debug media players information Memory Inspector: Inspect JavaScript ArrayBuffer Network conditions: Override the user agent string Recorder: Record, replay and measure user flows Security: Understand security issues WebAuthn: Emulate authenticators

Disable JavaScript

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To see how a web page looks and behaves when JavaScript is disabled:

  1. Open Chrome DevTools.

  2. Press Control+Shift+P or Command+Shift+P (Mac) to open the Command Menu.

    The Command Menu.

    Figure 1. The Command Menu

  3. Start typing javascript, select Disable JavaScript, and then press Enter to run the command. JavaScript is now disabled.

    Selecting 'Disable JavaScript' in the Command Menu.

    Figure 2. Selecting Disable JavaScript in the Command Menu

    The yellow warning icon next to Sources reminds you that JavaScript is disabled.

    The warning icon next to Sources.

    Figure 3. The warning icon next to Sources

JavaScript will remain disabled in this tab so long as you have DevTools open.

You may want to reload the page to see if and how the page depends on JavaScript while loading.

To re-enable JavaScript:

  • Open the Command Menu again and run the Enable JavaScript command.
  • Close DevTools.

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