I am trying to replace the second occurrence of a string in javascript. I'm using a regex to detect all the matches of the character that I'm looking for. The alert returns the same initial text.

text = 'BLABLA';
//var count = (texte.match(/B/g) || []).length;
var t=0;   
texte.replace(/B/g, function (match) {
t++;
return (t === 2) ? "Z" : match;
});
alert(text);

I am trying to replace the second occurrence of a string in javascript. I'm using a regex to detect all the matches of the character that I'm looking for. The alert returns the same initial text.

text = 'BLABLA';
//var count = (texte.match(/B/g) || []).length;
var t=0;   
texte.replace(/B/g, function (match) {
t++;
return (t === 2) ? "Z" : match;
});
alert(text);

https://js.do/code/157264

• javascript

• js.do/code/157301 – Patrick Roberts Commented Jun 15, 2017 at 13:22
• text vs texte – Nina Scholz Commented Jun 15, 2017 at 13:27

1 Answer 1

It's because you never use the result returned by the replace function.

Here's the corrected code:

const text = 'BLABLA'
let t = 0
const result = text.replace(/B/g, match => ++t === 2 ? 'Z' : match)

console.log(result)