JavaScript RegExp ?! Quantifier

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JavaScript RegExp ?! Quantifier

The RegExp ?!q quantifier matches any string that is not followed by a specific string q.

In the following example, we used global case-insensitive modifiers.

Example

HTML Online Editor
<!DOCTYPE html> <html> <body> <button onclick="myFunction()">Click me</button> <p id="point"></p> <script> function myFunction(){ var str = "His style Is who is he IS"; var pattern = /is(?! sty)/gi; var result = str.match(pattern); document.getElementById("point").innerHTML = result; } </script> </body> </html>

Syntax

new RegExp("?!q"); //or /?!q/

Syntax with modifiers

new RegExp("?!q", "g"); // or /?!q/g

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