TimeRanges.start()

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句法
范例
规范
浏览器兼容性
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Returns the time offset at which a specified time range begins.

句法

startTime = TimeRanges.start(index)

参数

index is the range number to return the starting time for.

异常

INDEX_SIZE_ERR: A DOMException thrown if the specified index doesn't correspond to an existing range.

范例

Given a video element with the ID "myVideo":

var v = document.getElementById("myVideo");
var buf = v.buffered;
var 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.

规范

规范	状态	注释
HTML 实时标准 The definition of 'TimeRanges.start()' in that specification.	实时标准	初始定义

浏览器兼容性

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. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`start`	Chrome Yes	Edge 12	Firefox Yes	IE Yes	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android Yes	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes

图例

完整支持

元数据

最后修改： Nov 22, 2019

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句法

参数

异常

范例

规范

浏览器兼容性

图例

相关话题