Forked from wuchengwei/dataURL to blob and blob to dataURL
Created
December 4, 2018 13:37
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dataURL to blob and blob to dataURL
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| //**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); | |
| }); |
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