Forked from wuchengwei/dataURL to blob and blob to dataURL
Created
July 12, 2020 07:50
-
-
Save tangyangzhe/548d84b08608ec675fe858ae74665f37 to your computer and use it in GitHub Desktop.
dataURL to blob and blob to dataURL
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
//**dataURL to blob** | |
function dataURLtoBlob(dataurl) { | |
var arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1], | |
bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n); | |
while(n--){ | |
u8arr[n] = bstr.charCodeAt(n); | |
} | |
return new Blob([u8arr], {type:mime}); | |
} | |
//**blob to dataURL** | |
function blobToDataURL(blob, callback) { | |
var a = new FileReader(); | |
a.onload = function(e) {callback(e.target.result);} | |
a.readAsDataURL(blob); | |
} | |
//test: | |
var blob = dataURLtoBlob('data:text/plain;base64,YWFhYWFhYQ=='); | |
blobToDataURL(blob, function(dataurl){ | |
console.log(dataurl); | |
}); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment