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RegExp.prototype.hasIndices

The hasIndices accessor property indicates whether or not the d flag is used with the regular expression.

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Description

RegExp.prototype.hasIndices has the value true if the d flag was used; otherwise, false. The d flag indicates that the result of a regular expression match should contain the start and end indices of the substrings of each capture group. It does not change the regex's interpretation or matching behavior in any way, but only provides additional information in the matching result.

The set accessor of hasIndices is undefined. You cannot change this property directly.

Examples

Using hasIndices

const str1 = 'foo bar foo';

const regex1 = /foo/gd;

console.log(regex1.hasIndices); // Output: true

console.log(regex1.exec(str1).indices[0]); // Output: Array [0, 3]
console.log(regex1.exec(str1).indices[0]); // Output: Array [8, 11]

const str2 = 'foo bar foo';

const regex2 = /foo/;

console.log(regex2.hasIndices); // Output: false

console.log(regex2.exec(str2).indices); // Output: undefined

Specifications

Specification
ECMAScript Language Specification # sec-get-regexp.prototype.hasIndices

Browser compatibility

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	Deno	Node.js
`hasIndices`	90	90	88	No	76	15	90	90	88	64	15	15.0	1.8	No