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September 14, 2015 19:25
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Start browser download of 'data' (or text) as the specified filename and mime type
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| // McKay Davis / 2015 | |
| // triggerBrowserDownloadOfDataAsFilename(data, filename = 'download', mimetype = 'text/plain') | |
| // | |
| // Start browser download of 'data' as the specified filename and mime type | |
| // if 'data' is already a dataURL, it will not be encoded and 'mimetype' will be ignored | |
| // if not specified, 'filename' will default to 'download' | |
| // if not specified, 'mimetype' will default to 'text/plain' | |
| // | |
| // example: | |
| // triggerBrowserDownloadOfDataAsFilename('Hello World!\n', 'hello.txt'); | |
| // | |
| // if data is already a dataURL: | |
| // triggerBrowserDownloadOfDataAsFilename(canvas.toDataURL('image/png'), 'canvas.png'); | |
| // | |
| function triggerBrowserDownloadOfDataAsFilename(data, filename, mimetype){ | |
| var elem = document.createElement('a'); | |
| elem.href = data.substr(0,5) === 'data:' ? data : | |
| ['data:', | |
| mimetype !== undefined ? mimetype : 'text/plain', | |
| ';base64,', | |
| window.btoa(data) | |
| ].join(""); | |
| elem.setAttribute('download', filename !== undefined ? filename : 'download'); | |
| elem.click(); | |
| } |
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