Easy Tutorial
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JavaScript RegExp ?= Quantifier


Definition and Usage

The ?=n quantifier matches any string that is followed by a specific string n.

Syntax


Browser Support

All major browsers support the ?= quantifier.


Examples

Example

Perform a global search for "is" followed by "all":

The highlighted text below shows where the expression matches: is all there is


❮ Dom Obj Optgroup Prop Tableheader Rowspan ❯