Web/API/PerformanceResourceTiming/encodedBodySize
The encodedBodySize
read-only property represents the size (in octets) received from the fetch (HTTP or cache), of the payload body, before removing any applied content-codings.
Note: This feature is available in Web Workers.
If the resource is retrieved from an application cache or a local resource, it must return the size of the payload body before removing any applied content-codings.
Syntax
resource.encodedBodySize;
Return value
A number
representing the size (in octets) received from the fetch (HTTP or cache), of the payload body, before removing any applied content-codings.
Example
The following example, the value of the size properties of all "resource
" type
events are logged.
function log_sizes(perfEntry){
// Check for support of the PerformanceEntry.*size properties and print their values
// if supported.
if ("decodedBodySize" in perfEntry)
console.log("decodedBodySize = " + perfEntry.decodedBodySize);
else
console.log("decodedBodySize = NOT supported");
if ("encodedBodySize" in perfEntry)
console.log("encodedBodySize = " + perfEntry.encodedBodySize);
else
console.log("encodedBodySize = NOT supported");
if ("transferSize" in perfEntry)
console.log("transferSize = " + perfEntry.transferSize);
else
console.log("transferSize = NOT supported");
}
function check_PerformanceEntries() {
// Use getEntriesByType() to just get the "resource" events
var p = performance.getEntriesByType("resource");
for (var i=0; i < p.length; i++) {
log_sizes(p[i]);
}
}
Specifications
Specification | Status | Comment |
Resource Timing Level 2The definition of 'encodedBodySize' in that specification. | Working Draft | Initial definition. |
Browser compatibility
The compatibility table in 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 | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
encodedBodySize
|
Chrome
Full support 54 |
Edge
Full support 17 |
Firefox
Full support 45 |
IE
No support No |
Opera
Full support 41 |
Safari
No support No |
WebView Android
Full support 54 |
Chrome Android
Full support 54 |
Firefox Android
Full support 45 |
Opera Android
Full support 41 |
Safari iOS
No support No |
Samsung Internet Android
Full support 6.0 |
Legend
- Full support
- Full support
- No support
- No support
PerformanceResourceTiming.encodedBodySize by Mozilla Contributors is licensed under CC-BY-SA 2.5.