CODEWITHSUNDEEP
javascriptinternet-explorer
user3515428
user3515428

Reputation: 59

String contains not working in IE

I am trying to use contains to find out if a phrase appears within a string The code below works fine in FF and Chrome, however IE8-10 return an error.

SCRIPT438: Object doesn't support property or method 'contains'

var str = "This is a string";
if(str.contains("string")){
    alert('Yes'};
}

Not sure why IE is throwing a error so any help would be much appreciated.

Upvotes: 3

Views: 7429

Answers (1)

Pointy
Pointy

Reputation: 413976

The .contains() function is an ES2015 feature that older Internet Explorer versions don't support.

The MDN page has a polyfill:

if ( !String.prototype.contains ) {
    String.prototype.contains = function() {
        return String.prototype.indexOf.apply( this, arguments ) !== -1;
    };
}

A general guide for questions like this: type MDN something into the Google search box. If you don't find a result, then "something" probably doesn't exist in the JavaScript universe. If you do, then there's a pretty good chance that you'll find the answer you seek there.

Upvotes: 9

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