TimeRanges: start() method

{{APIRef("HTML DOM")}}

The start() method of the {{domxref("TimeRanges")}} interface returns the time offset (in seconds) at which a specified time range begins.

Syntax

start(index)

Parameters

• index
  • : The range number to return the starting time for.

Return value

A number.

Exceptions

• IndexSizeError {{domxref("DOMException")}}
  • : Thrown if the specified index doesn't correspond to an existing range.

Examples

Given a video element with the ID "myVideo":

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

{{Specifications}}

Browser compatibility

{{Compat}}