Why does forEach() not work in an iframe in IE11?
foreach, html, iframe, internet-explorer-11, javascript
Solution
"IE11 uses Quirks Mode emulation if the top-level page is not in Edge Mode." - MSDN
In this mode, arrays don't support the forEach method.
Use a simple for loop instead, or write this right after the title tag of the parent:
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
Problem
This question was closed as off-topic, so I've marked the missing info. Specific problem or error plus shortest code neccesary: The code below doesn't work in IE11, if it's in an iframe of certain websites. ("Certain" is not specific, but I don't have a public demo. I can't make one, until I find the cause in my private code. Still, the question is specific enough to be answered by an expert, that's why I've asked SO instead of a long debugging process without any idea.) ``` ['a', 'b'].forEach(function(elem){console.log(elem);}); ``` The error says that the array doesn't support the forEach method. Desired behavior: The forEach() method executes a provided function once per array element. - MDN