Feature Detection: URL Length

Asked Sep 22 '16 at 15:36

Active Sep 22 '16 at 15:36

Viewed 47 times

How can you detect the max supported length of a URL in a browser using Javascript?

There are 2 ways to open a new tab with specific html:

var w = window.open(); w.document.write(html)
var w = window.open('data:text/html;charset=utf-8,' + encodeURIComponent(html))

The benefit of the latter is that the page can be refreshed, be bookmarked, and appear in history, but IE doesn't support urls over 2047 characters.

I could just check whether I'm in IE or not, but feature detection is much better - and maybe other browsers would also break if the url is too long. Is there a way to detect when I can open a window with specific content using a data protocol URI vs when I need to write it using JS?

asked Sep 22 '16 at 15:36

Josiah

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sort of related http://stackoverflow.com/questions/36918075/is-it-possible-to-programmatically-detect-size-limit-for-data-url – epascarello Sep 22 '16 at 15:42
Looks promising but he ended up taking a different tack. – Josiah Sep 22 '16 at 15:53
@epascarello - I mean that the author of that question started with a question similar to mine, but he ended up going a different direction so the answers there don't apply to what I'm doing. – Josiah Sep 22 '16 at 16:30
Ah, i misread your comment... – epascarello Sep 22 '16 at 16:31

Feature Detection: URL Length

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