IE 8 getSelection（）。anchorOffset替代方案

本文介绍了IE 8 getSelection（）。anchorOffset替代方案的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有一个Javascript代码，适用于现代浏览器：

I have got a Javascript code, which works well for modern browsers:

var offset = getSelection().anchorOffset;
var node   = getSelection().anchorNode;

如何在IE 8上获得相同的结果，IE 8没有window.getSelection（）方法？

How can I get the same result on IE 8, which does not have window.getSelection() method?

推荐答案

有一个解决方案。可以使用库来扩展浏览器的对象模型：

There is a solution. It is possible to extend browser's object model using Rangy library:

window.getSelection = rangy.getSelection

As it may take some time for Rangy to init and as we will not need this for modern browsers, some more workaround:

/* 
IE 8 getSelection() missing object and properties simple hack
*/
if (window.getSelection == undefined) {                /* IE? */
    var wgS = setInterval(function(){                  /* wait for Rangy */
        if (rangy.initialized) {
            window.getSelection = rangy.getSelection;  /* do the stuff */
            clearTimeout(wgS);                         /* exit */
        }
     }, 10);
}

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