How to delete non-numeric characters in javascript

In js, you can use the replace() function with the regular expression "/[^0-9]/g" or "/[^\d]/g" to delete non-numeric characters, syntax "str.replace(/[^0-9]/g,'')" or "str.replace(/[^\d]/g,'')".

The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.

In JavaScript, you can use the replace() function with regular expressions to delete non-numeric characters.

Thereplace() method is used to replace some characters with other characters in a string, or replace a substring that matches a regular expression.

Example:

var str="0123kj45j67u89";
var nstr = str.replace(/[^0-9]/g,'');
// var nstr = str.replace(/[^\d]/g, '');
console.log(nstr);

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