Javascript函数返回函数代码或"{[native code]}"，“我究竟做错了什么? [英] Javascript functions return lines of function code or "{[native code]}," what am I doing wrong?

问题描述

我正在编写一些代码以在可内容编辑的div中查找用户选择，我从

I am writing some code to find the user selection in a contenteditable div, I'm taking my code from this quirksmode article.

function findSelection(){
  var userSelection;
  if (window.getSelection) {userSelection = window.getSelection;} 
   else if (document.selection){userSelection = document.selection.createRange();} // For microsoft
  if (userSelection.text){return userSelection.text} //for Microsoft
   else {return userSelection} 
  } 

我正在Chrome和Firefox中对其进行测试，如果我在函数内执行alert(userSelection)或在函数外执行alert(findSelection();)，它将返回function getSelection() {[native code]}.如果我执行console.log(findSelection();)，它会给我getSelection().我做错了什么吗?

I'm testing it in Chrome and Firefox, if I do an alert(userSelection) within the function or an alert(findSelection();) outside the function, it returns function getSelection() {[native code]}. If I do console.log(findSelection();) it gives me getSelection(). Is there something I've done wrong?

推荐答案

将其更改为

if(window.getSelection){userSelection = window.getSelection();}

  if (window.getSelection) {userSelection = window.getSelection();}

(getSelection () )

(getSelection())

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