This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The loadEventStart
read-only property returns a timestamp
representing the time value equal to the time immediately before the load event of the current document is fired.
Syntax
perfEntry.loadEventStart;
Return Value
A timestamp
representing a time value equal to the time immediately before the load event of the current document is fired.
Example
The following example illustrates this property's usage.
function print_nav_timing_data() { // Use getEntriesByType() to just get the "navigation" events var perfEntries = performance.getEntriesByType("navigation"); for (var i=0; i < perfEntries.length; i++) { console.log("= Navigation entry[" + i + "]"); var p = perfEntries[i]; // dom Properties console.log("DOM content loaded = " + (p.domContentLoadedEventEnd - p.domContentLoadedEventStart)); console.log("DOM complete = " + p.domComplete); console.log("DOM interactive = " + p.interactive); // document load and unload time console.log("document load = " + (p.loadEventEnd - p.loadEventStart)); console.log("document unload = " + (p.unloadEventEnd - p.unloadEventStart)); // other properties console.log("type = " + p.type); console.log("redirectCount = " + p.redirectCount); } }
Specifications
Specification | Status | Comment |
---|---|---|
Navigation Timing Level 2 The definition of 'loadEventStart' in that specification. |
Working Draft | 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.