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    js-file-downloader
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    1.1.24 • Public • Published

    APE Design


    JS File Downloader

    Version License

    🌟Please remember to star this github repo if you like it. Thank you! ❤️

    Introduction

    JS File Downloader is a simple no dependency library you will be able to download file from browser and show downloading status.

    Browser Compatibility

    JS File Downloader supports all browsers that are [ES5-compliant] (http://kangax.github.io/compat-table/es5/) (IE8 and below are not supported).


    Installing with package manager

    With a package manager (recommended):

    npm install js-file-downloader --save 

    Basic usage

    import JsFileDownloader from 'js-file-downloader';
    
    const fileUrl = 'http://...';
    
    new JsFileDownloader({ 
        url: fileUrl
      })
      .then(function () {
        // Called when download ended
      })
      .catch(function (error) {
        // Called when an error occurred
      });
      

    Use without a package manager

    Download this library from https://github.com/AleeeKoi/js-file-downloader/releases

    <script src="/path/to/js-file-downloader.min.js"></script>
    <script>
      // Then somewhere in your code
      new jsFileDownloader({ url: 'https://cdn.apedesign.net/github/logo.png' })
        .then(function () {
          // Called when download ended
        })
        .catch(function (error) {
          // Called when an error occurred
        });
    </script>

    Options:

    process (for checking download status)

    A function to call every time a process event is called. Function receive an Event Object as input.

    function process (event) {
      if (!event.lengthComputable) return; // guard
      var downloadingPercentage = Math.floor(event.loaded / event.total * 100);
      // what to do ...
    };
    
    new JsFileDownloader({ 
      url: '...',
      process: process
    })
      

    onloadstart ('loadstart' event listener)

    A function to call when a 'loadstart' event is triggered.

    function onloadstart () {
      // what to do ...
    }
    
    new JsFileDownloader({ 
      url: '...',
      onloadstart
    })
      

    headers (of request)

    If you need to customize request header data you can pass an array of objects like following example:

    new JsFileDownloader({ 
      url: '...',
      headers: [
        { name: 'Authorization', value: 'Bearer ABC123...' }
      ]
    })

    filename

    Setting this String you can force output file name

    timeout (ms)

    Integer value (default 40000) defining how much ms attend before stop download action.

    autoStart

    Boolean value (default true) to enable/disable automatically starting the download. When the value is true the constructor returns a Promise, however when it's set to false, the constructor doesn't return anything and the download can be started by calling the start() method on the object.

    Example with autoStart set to true

    new JsFileDownloader({ 
      url: '...',
      autoStart: true
    })

    Example with autoStart set to false

    const download = new JsFileDownloader({ 
      url: '...',
      autoStart: false
    });
    
    download.start()
      .then(function(){
          // success 
      })
      .catch(function(error){
          // handle errors
      });

    forceDesktopMode

    Boolean value (default false) to force desktop mode even on mobile devices for downloading files.

    new JsFileDownloader({ 
      url: '...',
      forceDesktopMode: true
    })

    withCredentials

    This is a Boolean that indicates whether or not cross-site Access-Control requests should be made using credentials such as cookies, authorization headers or TLS client certificates. Setting withCredentials has no effect on same-site requests.

    new JsFileDownloader({ 
      url: '...',
      withCredentials: true
    })

    method

    The HTTP request method to use, such as "GET", "POST", "PUT", etc. (default "GET") Ignored for non-HTTP(S) URLs.

    new JsFileDownloader({ 
      url: '...',
      method: 'POST'
    })

    nameCallback

    You could pass a callback to customize final name, the function receive as 1st argument the name automatically extracted.

    new JsFileDownloader({ 
      url: '...',
      nameCallback: function(name) {
        return 'i-am-prefix-' + name;
      }
    })

    contentType

    Setting this property you can customize the content type in the heade request, default is 'application/x-www-form-urlencoded' If you set this property as false, the library doesn't set it.

    new JsFileDownloader({ 
      url: '...',
      contentType: 'multipart/form-data; boundary=something' // or false to unset it
    })

    nativeFallbackOnError

    By setting this property to true (default is false) when error occours the download will fallback to the default behavior opening a new tab.

    new JsFileDownloader({ 
      url: '...',
      nativeFallbackOnError: true
    })

    body

    By setting this property you can customize the body content sent with the request. Default value is null (nothing is sent), Document or BodyInit value can be set.

    new JsFileDownloader({ 
      url: '...',
      body: 'The body as a string'
    })

    contentTypeDetermination

    By setting this property the downloader will determine the content type automatically depending on the value.

    value description
    "header" Gets type from content-type response header.
    "signature" Analyzes the first 4 bytes of the returned file and will check if that signature exists in the predetermined dict (You can override/merge this dict with the customFileSigantures property).
    "full" Uses both methods from above but prefers "siganture".
    false Type is not determined and the default is added, application/octet-stream.
    new JsFileDownloader({ 
      url: '...',
      contentTypeDetermination: 'header'
    })

    customFileSignatures

    By setting this value you can override/merge the predefined signature dict (src/signatures.js). The key represents the hex code of a file (for more information here) and the value should be in the format of a content type (e.g. application/pdf). Setting this value has only an affect when contentTypeDetermination is set to "full" or "signature".

    new JsFileDownloader({ 
      url: '...',
      contentTypeDetermination: 'full', // must be set to "full" or "signature"
      customFileSignatures: {
        'FFFB':'audio/mpeg',
        'FFF3':'audio/mpeg',
        'FFF2':'audio/mpeg',
        '494433': 'audio/mpeg'
      }
    })

    License

    MIT

    Copyright (c) 2019-present, Alessandro Pellizzari

    apedesign.net

    Install

    npm i js-file-downloader

    DownloadsWeekly Downloads

    6,996

    Version

    1.1.24

    License

    MIT

    Unpacked Size

    215 kB

    Total Files

    21

    Last publish

    Collaborators

    • aleeekoi