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navigator.webdriver

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The webdriver read-only property of the navigator interface indicates whether the user agent is controlled by automation.

It defines a standard way for co-operating user agents to inform the document that it is controlled by WebDriver, for example so that alternate code paths can be triggered during automation.

The navigator.webdriver property is true when in:

Chrome
The --enable-automation or the --headless flag is used.
Firefox
The marionette.enabled preference or --marionette flag is passed.

Syntax

var isAutomated = navigator.webdriver

Value

A Boolean

Specifications

Specification Status Comment
WebDriver
The definition of 'webdriver' in that specification.
Recommendation Initial definition.

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 63 ? ? ? 50 ?
Mobile
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support ? 63 ? ? 50 ? ?

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https://developer.mozilla.org/en-US/docs/Web/API/navigator/webdriver