Javascript 函数返回函数代码行或“{[native code]},”我做错了什么？

发布于 2024-09-01 19:25:08 字数 750 浏览 2 评论 0原文

我正在编写一些代码来在 contenteditable div 中查找用户选择，我从获取代码这篇怪异模式文章。

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 中测试它，如果我在函数内执行 alert(userSelection) 或在函数外部执行alert(findSelection();)，它会返回 function getSelection() {[本机代码]}。如果我这样做 console.log(findSelection();) 它会给我 getSelection()。我是不是做错了什么？

原文

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} 
  }

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?

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各自安好 2024-09-08 19:25:08

getSelection 是一个函数...您需要执行它才能获得选择？

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

getSelection is a function... you need to execute it to get the selection?

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

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海拔太高太耀眼 2024-09-08 19:25:08

将其更改为

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

(getSelection())

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那小子欠揍 2024-09-08 19:25:08

这是为了获取选择的文本。即使修复了拼写错误，您也会遇到不一致的行为：IE 将选择的文本作为字符串返回，而其他浏览器将返回一个 Selection 对象，该对象仅在其 toString() 方法被调用。

以下内容会更好：

function getSelectionText(){
    if (window.getSelection) {
        return "" + window.getSelection();
    } else if (document.selection && document.selection.createRange) {
        return document.selection.createRange().text;
    }
}

This is to get the text of the selection. Even with the typo fixed, you've got inconsistent behaviour: IE is returning the selection's text as a string while other browsers will return a Selection object that will give you the selection text string only when its toString() method is called.

The following would be better:

function getSelectionText(){
    if (window.getSelection) {
        return "" + window.getSelection();
    } else if (document.selection && document.selection.createRange) {
        return document.selection.createRange().text;
    }
}

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