Question

I am trying to built a websocket application in IE9 but I have the following Javascript error:

IE9 Console:

SCRIPT438: Object doesn't support property or method 'map' 
websock.js, line 211 character 5

websock.js function:

function send_string(str) {
    //Util.Debug(">> send_string: " + str);
    api.send(str.split('').map(
        function (chr) { return chr.charCodeAt(0); } ) );
}

Also in IE9 console str = the text I entered. and if I try to split it first then I get the correct array of the string but still map is not working.

For example if I try to send “text”:

str.split("") = ['t','e','x','t']

And I found this in the console. But unfortunately .map is not working. Any suggestions?

PS:

I tried to change the w3school code this link:

document.write(str.split("").map(
        function (chr) { return chr.charCodeAt(0); } ) + "<br />");

And map is working here with the desirable result using IE9!

Answer 1

IE9 supports map, but most possibly your html page is rendered in quirks mode, that’s why. Try adding a doctype, and see if that solves the problem.