The ProgressEvent.loaded read-only property is an unsigned long long representing the amount of work already performed by the underlying process. The ratio of work done can be calculated with the property and ProgressEvent.total. When downloading a resource using HTTP, this only represent the part of the content itself, not headers and other overhead.
value = ProgressEvent.loaded
| Specification | Status | Comment |
|---|---|---|
| Progress Events The definition of 'ProgressEvent.loaded' in that specification. | Recommendation | Initial definition. |
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | No support | (Yes) | 3.5 (1.9.1) | No support | No support | No support |
| Feature | Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | No support | (Yes) | 1.0 (1.9.1) | No support | No support | No support |
ProgressEvent interface it belongs to.
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https://developer.mozilla.org/en-US/docs/Web/API/ProgressEvent/loaded