如何检查图像源中是否包含某个单词并替换该单词？

Question

I would like to replace the words in an image link based on if that word exists in it. My code seems like it would work but is doesn't. Heres my code:

 topimg.addEventListener('error', function(){

    if(topimg.src.indexOf('Tee')){
        topimg.src.replace('Tee', 'T-Shirt');
    }

Answer 1

From the MDN web docs for String.prototype.replace() :

The replace() method returns a new string with some or all matches of a pattern replaced by a replacement. ...

The original string is left unchanged.

So therefore try:

 topimg.addEventListener('error', function() {
    if (topimg.src.indexOf('Tee')) {
        topimg.src = topimg.src.replace('Tee', 'T-Shirt');
    }
    ...
 }