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RegExp.prototype.hasIndices

The hasIndices property indicates whether or not the "d" flag is used with the regular expression. hasIndices is a read-only property of an individual regular expression instance.

Property attributes of RegExp.prototype.hasIndices
Writable no
Enumerable no
Configurable yes

Description

The value of hasIndices is a Boolean and 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.

You cannot change this property directly.

Examples

Using hasIndices

const str1 = 'foo bar foo';

const regex1 = new RegExp('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 = new RegExp('foo');

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

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

Specifications

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
No
15
90
90
88
No
15
15.0
1.8
No

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/hasIndices