History
.length是一个只读属性,返回一个整型,表示在session中元素的个数,包括当前已经加载的页面。例如,在新的标签里面加载的页面,此时的属性是1
语法
length = history.length;
示例
var result = window.history.length; // Returns the size of the history of the current session.
Specifications
Specification | Status | Comment |
---|---|---|
HTML Living Standard The definition of 'History.length' in that specification. |
Living Standard | No change from HTML5. |
HTML5 The definition of 'History.length' in that specification. |
Recommendation | Initial definition. |
Browser compatibility
Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) | Mozilla Servo |
---|---|---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | implemented |
Feature | Android | Edge | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
See also
- The
History
interface it belongs to.