JavaScript - Use variable in string match
Although the match function doesn't accept string literals as regex patterns, you can use the constructor of the RegExp object and pass that to the String.match function:
var re = new RegExp(yyy, 'g');xxx.match(re);Any flags you need (such as /g) can go into the second parameter.
You have to use RegExp object if your pattern is string
var xxx = "victoria";var yyy = "i";var rgxp = new RegExp(yyy, "g");alert(xxx.match(rgxp).length);If pattern is not dynamic string:
var xxx = "victoria";var yyy = /i/g;alert(xxx.match(yyy).length);
For example:
let myString = "Hello World"let myMatch = myString.match(/H.*/)console.log(myMatch)Or
let myString = "Hello World"let myVariable = "H"let myReg = new RegExp(myVariable + ".*")let myMatch = myString.match(myReg)console.log(myMatch)