The onloadstart
property of the GlobalEventHandlers
mixin is an EventHandler
representing the code to be called when the loadstart
event is raised (when progress has begun on the loading of a resource.)
Syntax
img.onloadstart = funcRef;
Value
funcRef
is the handler function to be called when the resource's loadstart
event fires.
Examples
HTML content
<img src="myImage.jpg">
JavaScript content
// 'loadstart' fires first, then 'load', then 'loadend' image.addEventListener('load', function(e) { console.log('Image loaded'); }); image.addEventListener('loadstart', function(e) { console.log('Image load started'); }); image.addEventListener('loadend', function(e) { console.log('Image load finished'); });
Specifications
Specification | Status | Comment |
---|---|---|
HTML Living Standard The definition of 'onloadstart' in that specification. |
Living Standard | Initial definition |
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.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
onloadstart | Chrome
Full support
Yes
| Edge Full support 12 | Firefox Full support 52 | IE Full support Yes | Opera
Full support
Yes
| Safari
Full support
Yes
| WebView Android
Full support
Yes
| Chrome Android
Full support
Yes
| Firefox Android Full support 52 | Opera Android
Full support
Yes
| Safari iOS
Full support
Yes
| Samsung Internet Android
Full support
Yes
|
Legend
- Full support
- Full support
- See implementation notes.
- See implementation notes.