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 |
---|
Resource Timing Level 2 # dom-performanceresourcetiming-encodedbodysize |
Browser compatibility
BCD tables only load in the browser