TimeRanges.length

只读属性 TimeRanges.length 返回对象中时间范围的个数。

语法

length = TimeRanges.length;

示例

假定页面中存在一个ID为“myVideo”的 video 元素:

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
  }
}

这个例子演示了如何通过 TimeRanges 来判断 video 是否已经完全加载。

规范

Specification Status Comment
HTML Living Standard
TimeRanges.length()
Living Standard Initial definition

浏览器兼容性

BCD tables only load in the browser