Non-standard
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
Deprecated since Gecko 7 (Firefox 7 / Thunderbird 7 / SeaMonkey 2.4)
This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
Summary
The getAsDataURL provides a data:
URL that encodes the entire contents of the referenced file.
Note: This method is obsolete; you should use the FileReader
method readAsDataURL()
instead.
Syntax
var url = instanceOfFile.getAsDataURL();
Returns
A string representing a data:
URL
Example
// fileInput is a HTMLInputElement: <input type="file" id="myfileinput" multiple> var fileInput = document.getElementById("myfileinput"); // files is a FileList object (similar to NodeList) var files = fileInput.files; // array with acceptable file types var accept = ["image/png"]; // img is a HTMLImgElement: <img id="myimg"> var img = document.getElementById("myimg"); // if we accept the first selected file type if (accept.indexOf(files[0].mediaType) > -1) { // display the image // same as <img src="data:image/png,<imagedata>"> img.src = files[0].getAsDataURL(); }
Specification
Not part of any specification.