startsWith not supported in IE

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Joined: Mon Dec 03, 2018 3:30 am

startsWith not supported in IE

Postby Andreas » Mon Jan 14, 2019 1:50 am

Hi Folks,

It looks like startsWith / String.prototype.startsWith is not supported by IE (all the way up to 11). When executing in other browsers, the call works fine. IE 11 results in error: "SCRIPT438: Object doesn't support property or method 'startsWith'".
Is this something you should include, say as a workaround for IE:

if (!String.prototype.startsWith) {
String.prototype.startsWith = function(searchString, position) {
position = position || 0;
return this.indexOf(searchString, position) === position;


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