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declarativeNetRequest.isRegexSupported

Checks if a regular expression is supported as a declarativeNetRequest.RuleCondition.regexFilter rule condition.

Syntax

let count = browser.declarativeNetRequest.isRegexSupported(
    regexOptions                // object
);

Parameters

regexOptions

An object containing the regular expression to check.

isCaseSensitive Optional

boolean Whether the regex specified is case sensitive. Default is true.

regex

string The regular expression to check.

requireCapturing Optional

boolean Whether the regex specified requires capturing. Capturing is only required for redirect rules that specify a regexSubstitution action. The default is false.

Return value

A Promise that fulfills with an object with these properties:

isSupported

boolean Whether the regular expression is supported.

reason Optional

string Specifies the reason why the regular expression is not supported. Possible values are "syntaxError" and "memoryLimitExceeded". Only provided if isSupported is false.

If the request fails, the promise is rejected with an error message.

Examples

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
isRegexSupported 87 87 No ? 73 15 ? ? No ? 15 ?

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https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/declarativeNetRequest/isRegexSupported