IE issue - Object.keys(value).length not supported

internet-explorer, javascript, jquery

Solution

The `keys` property is supported in IE >= 9. You are probably testing it in an earlier version. A simple workaround is:

var length = 0;
for(var prop in data){
    if(data.hasOwnProperty(prop))
        length++;
}

Here is a demonstration: http://jsfiddle.net/vKr8a/

See this compatibility table for more info:

http://kangax.github.com/es5-compat-table/

Problem

I've been trying to debug some js in Internet Explorer, and I can't figure this one out. Here's the line that is causing the error: ``` var numberOfColumns = Object.keys(value).length; ``` And the error is... ``` Message: Object doesn't support this property or method Line: 640 Char: 5 Code: 0 URI: xxx ``` At first I thought it had something to do with the `Object.keys(value).length;` property, but strangely (for me anyways), the error is at char 5, which is the beginning of the variable name. Anyways, I have no idea what's going on or how to fix it. Also, if I replace: ``` var numberOfColumns = Object.keys(value).length; ``` With ... ``` var numberOfColumns = 9; // troubleshooting ``` The error persists. Please help. Update jsFiddle added http://jsfiddle.net/4Rab7/

Original source

Related problems