Javascript innerHTML vs outerHTML

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忘掉有多难 2021-01-03 23:24

I have the following javascript:

// create a new article tag
var elem = document.createElement(\'article\');

// append the article to the comments list
docu


      
      
        
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                   时光说笑
                                             
                
                
                (楼主)
            
              
              
                2021-01-03 23:36
              

            
            
                        
Taken from the MDN-site :

innerHTML


The Element.innerHTML property sets or gets the HTML syntax describing the element's descendants.



  Note: If a 
, , or </code> node has a child text node that
  includes the characters <code>(&), (<),</code> or <code>(>)</code>, <code>innerHTML</code> returns these
  characters as &amp, &lt and &gt respectively. Use <code>Node.textContent</code> to
  get a correct copy of these text nodes' contents.</p>
</blockquote>

<h2>outerHTML</h2>

<p>The <code>outerHTML</code> attribute of the <code>element</code> DOM interface gets the serialized HTML fragment describing the element including its descendants. It can be set to replace the element with nodes parsed from the given string.</p>

<p><strong><em>innerHTML</em> vs. <em>outerHTML</em></strong> :</p>

<p>Use <code>innerHTML</code> as default. This replaces <strong>only</strong> the content (if using i.e. "=") <strong>inside</strong> the current element referred to. If you are using <code>outerHTML</code>, then the <strong>element</strong> referred to will <strong>also</strong> be replaced.</p>

<p><em>Demo:</em></p>

<p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>var h20 = document.getElementById("h20"),
    h21 = document.getElementById("h21");
var ran = false;

console.log("'h20' innerHTML (1) =", "'" + h20.innerHTML + "'", "outerHTML (1) =", "'" + h20.outerHTML + "'");
console.log("'h21' innerHTML (1) =", "'" + h21.innerHTML + "'", "outerHTML (1) =", "'" + h21.outerHTML + "'");

document.getElementById("button").onclick = evt => {
    if (ran) return false;
    
    h20.innerHTML = "<div>innerHTML</div>";
    h21.outerHTML = "<div>outerHTML</div>";
    
    console.log("'h20' innerHTML (2) =", "'" + h20.innerHTML + "'", "outerHTML (2) =", "'" + h20.outerHTML + "'");
    console.log("'h21' innerHTML (2) =", "'" + h21.innerHTML + "'", "outerHTML (2) =", "'" + h21.outerHTML + "'");
    
    ran = true
}</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code><button id="button">innerHTML vs. outerHTML</button>
<br>
<h2 id="h20"></h2>
<h2 id="h21"></h2></code></pre>
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