Gary Guagliardo Jr guag
bgrins
/ detectDataURL.js
Last active
December 18, 2023 18:57
Detect if a string is a data URL. Doesn't try to parse it or determine validity, just a quick check if a string appears to be a data URL. See http://jsfiddle.net/bgrins/aZWTB/ for a demo.
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| // Detecting data URLs | |
| // data URI - MDN https://developer.mozilla.org/en-US/docs/data_URIs | |
| // The "data" URL scheme: http://tools.ietf.org/html/rfc2397 | |
| // Valid URL Characters: http://tools.ietf.org/html/rfc2396#section2 | |
| function isDataURL(s) { | |
| return !!s.match(isDataURL.regex); | |
| } | |
| isDataURL.regex = /^\s*data:([a-z]+\/[a-z]+(;[a-z\-]+\=[a-z\-]+)?)?(;base64)?,[a-z0-9\!\$\&\'\,\(\)\*\+\,\;\=\-\.\_\~\:\@\/\?\%\s]*\s*$/i; |