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The FileReader.onload
property contains an event handler executed when the load
event is fired, when content read with readAsArrayBuffer, readAsBinaryString, readAsDataURL or readAsText is available.
Example
// Callback from a <input type="file" onchange="onChange(event)">
function onChange(event) {
var file = event.target.files[0];
var reader = new FileReader();
reader.onload = function(e) {
// The file's text will be printed here
console.log(e.target.result)
};
reader.readAsText(file);
}
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
onload | Chrome Full support 7 | Edge Full support 12 | Firefox Full support 3.6 | IE Full support 10 | Opera Full support 11 | Safari Full support 6 | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support 32 | Opera Android Full support 11 | Safari iOS Full support 6.1 | Samsung Internet Android ? |
Legend
- Full support
- Full support
- Compatibility unknown
- Compatibility unknown