javascript - Difference between textContent vs innerText - Stack Overflow

admin管理员组

文章数量:1129400

What is the difference between textContent and innerText in JavaScript?

Can I use textContent as follows:

var logo$ = document.getElementsByClassName('logo')[0];
logo$.textContent = "Example";

What is the difference between textContent and innerText in JavaScript?

Can I use textContent as follows:

var logo$ = document.getElementsByClassName('logo')[0];
logo$.textContent = "Example";

• javascript

Share Improve this question Follow edited Sep 7, 2018 at 0:34 u-ways 7,67466 gold badges3838 silver badges5454 bronze badges asked Feb 4, 2016 at 22:45 J KJ K 5,36366 gold badges1717 silver badges2424 bronze badges 10

• 1 @Pointy what is the one that all browsers support? – Yehia Awad Commented Feb 4, 2016 at 22:47
• 17 A good blog post about it – webketje Commented Feb 4, 2016 at 22:49
• There isn't one. You have to include code to check which exists and then use that one. – Pointy Commented Feb 4, 2016 at 22:49
• 9 @Pointy please refer to the blog post I pointed to. Your statement is incorrect, there is a difference. – webketje Commented Feb 4, 2016 at 22:55
• 11 innerText and textContent are decidedly not the same. White-space occurences in node content will cause the two properties yield different content, and so will occurences of br elements and other block-level rendered descendants. – Armen Michaeli Commented Apr 27, 2019 at 14:58

 |  Show 5 more comments

11 Answers 11

Sorted by: Reset to default 505

The key differences between innerText and textContent are outlined very well in Kelly Norton's blogpost: innerText vs. textContent. Below you can find a summary:

1. innerText was non-standard, textContent was standardized earlier.
2. innerText returns the visible text contained in a node, while textContent returns the full text. For example, on the following HTML <span>Hello <span style="display: none;">World</span></span>, innerText will return 'Hello', while textContent will return 'Hello World'. For a more complete list of differences, see the table at http://perfectionkills.com/the-poor-misunderstood-innerText/ (further reading at 'innerText' works in IE, but not in Firefox).
3. As a result, innerText is much more performance-heavy: it requires layout information to return the result.
4. innerText is defined only for HTMLElement objects, while textContent is defined for all Node objects.

Be sure to also have a look at the informative comments below this answer.

textContent was unavailable in IE8-, and a bare-metal polyfill would have looked like a recursive function using nodeValue on all childNodes of the specified node:

function textContent(rootNode) {
  if ('textContent' in document.createTextNode(''))
    return rootNode.textContent;

  var childNodes = rootNode.childNodes,
      len = childNodes.length,
      result = '';
  
  for (var i = 0; i < len; i++) {
    if (childNodes[i].nodeType === 3)
      result += childNodes[i].nodeValue;
    else if (childNodes[i].nodeType === 1) 
      result += textContent(childNodes[i]);
  }

  return result;
}

textContent is the only one available for text nodes:

var text = document.createTextNode('text');

console.log(text.innerText);    //  undefined
console.log(text.textContent);  //  text

In element nodes, innerText evaluates <br> elements, while textContent evaluates control characters:

var span = document.querySelector('span');
span.innerHTML = "1<br>2<br>3<br>4\n5\n6\n7\n8";
console.log(span.innerText); // breaks in first half
console.log(span.textContent); // breaks in second half

<span></span>

span.innerText gives:

1
2
3
4 5 6 7 8

span.textContent gives:

1234
5
6
7
8

Strings with control characters (e. g. line feeds) are not available with textContent, if the content was set with innerText. The other way (set control characters with textContent), all characters are returned both with innerText and textContent:

var div = document.createElement('div');
div.innerText = "x\ny";
console.log(div.textContent);  //  xy

For those who googled this question and arrived here. I feel the most clear answer to this question is in MDN document: https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent.

You can forgot all the points that may confuse you but remember 2 things:

1. When you are trying to alter the text, textContent is usually the property you are looking for.
2. When you are trying to grab text from some element, innerText approximates the text the user would get if they highlighted the contents of the element with the cursor and then copied to the clipboard. And textContent gives you everything, visible or hidden, including <script> and <style> elements.

Both innerText & textContent are standardized as of 2016. All Node objects (including pure text nodes) have textContent, but only HTMLElement objects have innerText.

While textContent works with most browsers, it does not work on IE8 or earlier. Use this polyfill for it to work on IE8 only. This polyfill will not work with IE7 or earlier.

if (Object.defineProperty 
  && Object.getOwnPropertyDescriptor 
  && Object.getOwnPropertyDescriptor(Element.prototype, "textContent") 
  && !Object.getOwnPropertyDescriptor(Element.prototype, "textContent").get) {
  (function() {
    var innerText = Object.getOwnPropertyDescriptor(Element.prototype, "innerText");
    Object.defineProperty(Element.prototype, "textContent",
     {
       get: function() {
         return innerText.get.call(this);
       },
       set: function(s) {
         return innerText.set.call(this, s);
       }
     }
   );
  })();
}

The Object.defineProperty method is availabe in IE9 or up, however it is available in IE8 for DOM objects only.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty

https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent

textContent is supported by most browsers. It is not supported by ie8 or earlier, but a polyfill can be used for this

The textContent property sets or returns the textual content of the specified node, and all its descendants.

See http://www.w3schools.com/jsref/prop_node_textcontent.asp

Aside from all the differences that were named in the other answers, here is another one which I discovered only recently:

Even though the innerText property is said to've been standardised since 2016, it exhibits differences between browsers: Mozilla ignores U+200E and U+200F characters ("lrm" and "rlm") in innerText, while Chrome does not.

console.log(document.getElementById('test').textContent.length);
console.log(document.getElementById('test').innerText.length);

<div id="test">[&#x200E;]</div>

Firefox reports 3 and 2, Chrome reports 3 and 3.

Not sure yet if this is a bug (and if so, in which browser) or just one of those quirky incompatibilities which we have to live with.

textContent returns full text and does not care about visibility, while innerText does.

<p id="source">
    <style>#source { color: red; }</style>
    Text with breaking<br>point.
    <span style="display:none">HIDDEN TEXT</span>
</p>

Output of textContent:

#source { color: red; } Text with breakingpoint. HIDDEN TEXT

Output of innerText ( note how innerText is aware of tags like <br>, and ignores hidden element ):

Text with breaking point.

Another useful behavior of innerText compared to textContent is that newline characters and multiple spaces next to each other will be displayed as one space only, which can be easier to compare a string.

But depending on what you want, firstChild.nodeValue may be enough.

document.querySelector('h1').innerText/innerHTML/textContent 

.querySelector('h1').innerText - gives us text inside. It sensitive to what is currently being displayed or staff that's being hidden is ignored.

.querySelector('h1').textContent - it's like innerText but it does not care about what is being displayed or what's actually showing to user. It will show all.

.querySelector('h1').innerHTML = <i>sdsd</i> Will work* - retrieves full contents, including the tag names.

Not mentioned here, innerText returns a reference to an object, not a string, which may trip you up if you want to get and preserve an element's original text for later recall.

What this means in practical terms is, if you set a JavaScript variable to an element's innerText and the innerText subsequently changes, the value of your variable will change to reflect the new value.

innerHTML will execute even the HTML tags which might be dangerous causing any kind of client-side injection attack like DOM based XSS. Here is the code snippet:

<!DOCTYPE html>
<html>
    <body>
        <script>
            var source = "Hello " + decodeURIComponent("<h1>Text inside gets executed as h1 tag HTML is evaluated</h1>");  //Source
            var divElement = document.createElement("div");
            divElement.innerHTML = source;  //Sink
            document.body.appendChild(divElement);
        </script>
    </body>
</html>

If you use .textContent, it will not evaluate the HTML tags and print it as String.

<!DOCTYPE html>
<html>
    <body>
        <script>
            var source = "Hello " + decodeURIComponent("<h1>Text inside will not get executed as HTML</h1>");  //Source
            var divElement = document.createElement("div");
            divElement.textContent = source;  //Sink
            document.body.appendChild(divElement);
        </script>
    </body>
</html>

Reference: https://www.scip.ch/en/?labs.20171214

本文标签： javascriptDifference between textContent vs innerTextStack Overflow