GlobalEventHandlers.onloadstart

The onloadstart property of the GlobalEventHandlers mixin is an event handler 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
HTML Standard (HTML) # handler-onloadstart

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`onloadstart`	32 The `loadstart` event is not fired on `<img>` elements.	12	9	9	19 The `loadstart` event is not fired on `<img>` elements. ≤12.1-15	9 The `loadstart` event is not fired on `<img>` elements.	4.4.3 The `loadstart` event is not fired on `<img>` elements.	32 The `loadstart` event is not fired on `<img>` elements.	9	19 The `loadstart` event is not fired on `<img>` elements. ≤12.1-14	9 The `loadstart` event is not fired on `<img>` elements.	2.0 The `loadstart` event is not fired on `<img>` elements.

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https://developer.mozilla.org/en-US/docs/Web/API/GlobalEventHandlers/onloadstart