TimeRanges: start() method
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The start() method of the TimeRanges interface returns the time offset (in seconds) at which a specified time range begins.
Syntax
js
start(index)
Parameters
index-
The range number to return the starting time for.
Return value
A number.
Exceptions
IndexSizeErrorDOMException-
Thrown if the specified index doesn't correspond to an existing range.
Examples
Given a video element with the ID "myVideo":
js
const v = document.getElementById("myVideo");
const buf = v.buffered;
const numRanges = buf.length;
if (buf.length === 1) {
// only one range
if (buf.start(0) === 0 && buf.end(0) === v.duration) {
// The one range starts at the beginning and ends at
// the end of the video, so the whole thing is loaded
}
}
This example looks at the time ranges and looks to see if the entire video has been loaded.
Specifications
| Specification |
|---|
| HTML # dom-timeranges-start-dev |
Browser compatibility
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