JavaScript RegExp ?! Quantifier

Definition and usage

?!n Quantifiers match any string that is not immediately followed by n string.

Tip:Use ?=n Quantifiers to match any string that immediately follows n string.

Example

Search globally for "is" without case sensitivity, not immediately followed by "all":

let text = "Is this all there is";
let pattern = /is(?! all)/gi;

Try it yourself

Syntax

new RegExp("regexp(?!n)")

Or abbreviated as:

/regexp(?!n)/

Syntax with modifiers

new RegExp("regexp(?!n)", "g")

Or abbreviated as:

/regexp(?!n)/g

Browser supports

/(?!n)/ Ito ay ECMAScript1 (ES1) katangian.

Lahat ng browser ay ganap na sumusuporta sa ES1 (JavaScript 1997)：

Chrome IE Edge Firefox Safari Opera
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