How to fix 80% of IE browser issues

## Tell IE to use standards mode, not quirks mode Define your doctype in your HTML: element See: https://msdn.microsoft.com/en-us/library/cc288325(v=vs.85).aspx ## Tell IE to not use compatibility mode This prevents, for example, IE 11 from using IE 7 rendering mode which can happen for many reasons. If you can't add an HTTP header, then add this to your HTML and pray that it helps: IE is using a compatibility mode if you see "compatible; MSIE" in the user agent header: "Mozilla/4.0 (compatible; MSIE 7.0;" See: - http://stackoverflow.com/a/9338959 - https://msdn.microsoft.com/en-us/library/ff405803(v=vs.85).aspx - https://blogs.msdn.microsoft.com/ieinternals/2013/09/21/internet-explorer-11s-many-user-agent-strings/ ## Validate your HTML and CSS https://validator.w3.org/ ## Use an IE hack Try "zoom" or "!important".