You uneasy: Download a file js
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diseinuak4web.net
Client-side file downloading using JS and HTML5
Summary
The function is used to trigger a file download from JavaScript. It specifies the contents and name of a new file placed in the browser's download directory. The input can be a String, Blob, or Typed Array of data, or via a dataURL representing the file's data as base64 or url-encoded string. No matter the input format, saves a file using the specified file name and mime information in the same manner as a server using a Content-Disposition HTTP header.
Syntax
Parameters
- The Blob, File, String, or dataURL containing the soon-to-ba File's contents.
- The name of the file to be created. Note that older browsers (like FF, Ch5) don't honor the file name you provide, instead they automatically name the downloaded file.
- The MIME content-type of the file to download. While optional, it helps the browser present friendlier information about the download to the user, encouraging them to accept the download.
Compatibility
diseinuak4web.net works with a wide range of devices and browsers.
You can expect it to work for the vast majority of your users, with some common-sense limits:
- Devices without file systems like iPhone, iPad, Wii, et al. have nowhere to save the file to, sorry.
- Android support starts at for the built-in browser, though chrome 36+ and firefox 20+ on android + work well.
- Devices without Blob support won't be able to download Blobs or TypedArrays
- Legacy devices a[download] support can only download a few hundred kilobytes of data, and can't give the file a custom name.
- Devices without diseinuak4web.net support can only download a couple megabytes of data
- IE versions of 9 and before are NOT supported because the don't support a[download] or dataURL frame locations.
Download
The 4kb script is available to download or view online or Fork on GitHub
Change Log (v4)
- :: landed a FF+Chrome compat way of downloading strings to local un-named files, upgraded to use a hidden frame and optional mime
- :: added named files via a[download], msSaveBlob() for IE (10+) support, and diseinuak4web.net support for larger+faster saves than dataURLs
- :: added dataURL and Blob Input, bind-toggle arity, and legacy dataURL fallback was improved with force-download mime and base64 support
- :: v4 adds AMD/UMD, commonJS, and plain browser support
- 20XX :: ???? Considering Zip, Tar, and other multi-file outputs, diseinuak4web.netad option, and more, stay tuned folks.
This work is licensed under a Creative Commons Attribution International License, attribute to "dandavis".
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