Javascript innerHTML vs outerHTML

后端未结

关注

 3  427

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


      
      
        
          3条回答        

        
                    
            
            
                         
                
              
              
                
                   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>
</div>
</div>
</p>
    </p>
             <div class="appendcontent">
                                                        </div>
            </div>
            <div class="jieda-reply">
              <span class="jieda-zan button_agree" type="zan" data-id='1592823'>
                <i class="iconfont icon-zan"></i>
                <em>0</em>
              </span>
                   <span type="reply" class="showpinglun" data-id="1592823">
                <i class="iconfont icon-svgmoban53"></i>
               讨论(0)
              </span>
                                                  
              
              <div class="jieda-admin">
                          
             
       
          
              </div>
                                       <div class="noreplaytext bb">
<center><div>   <a href="https://www.e-learn.cn/qa/q-637554.html">  查看其它3个回答
</a>
</div></center>
</div>            </div>
                         <div class="comments-mod "  style="display: none; float:none;padding-top:10px;" id="comment_1592823">
                    <div class="areabox clearfix">

<form class="layui-form" action="">
               
            <div class="layui-form-item">
    <label class="layui-form-label" style="padding-left:0px;width:60px;">发布评论:</label>
    <div class="layui-input-block" style="margin-left:90px;">
         <input type="text" placeholder="不少于5个字" AUTOCOMPLETE="off" class="comment-input layui-input" name="content" />
                        <input type='hidden' value='0' name='replyauthor' />
    </div>
    <div class="mar-t10"><span class="fr layui-btn layui-btn-sm addhuidapinglun" data-id="1592823">提交评论 </span></div>
  </div>
  
</form>
                    </div>
                    <hr>
                    <ul class="my-comments-list nav">
                        <li class="loading">
                        <img src='https://www.e-learn.cn/qa/static/css/default/loading.gif' align='absmiddle' />
                        &nbsp;加载中...
                        </li>
                    </ul>
                </div>
          </li>
                              			
        </ul>
        
        <div class="layui-form layui-form-pane">
          <form id="huidaform"  name="answerForm"  method="post">
            
            <div class="layui-form-item layui-form-text">
              <a name="comment"></a>
              <div class="layui-input-block">
            
    
<script type="text/javascript" src="https://www.e-learn.cn/qa/static/js/neweditor/ueditor.config.js"></script>
<script type="text/javascript" src="https://www.e-learn.cn/qa/static/js/neweditor/ueditor.all.js"></script>
<script type="text/plain" id="editor"  name="content"  style="width:100%;height:200px;"></script>                                 
<script type="text/javascript">
                                 var isueditor=1;
            var editor = UE.getEditor('editor',{
                //这里可以选择自己需要的工具按钮名称,此处仅选择如下五个
                toolbars:[['source','fullscreen',  '|', 'undo', 'redo', '|', 'bold', 'italic', 'underline', 'fontborder', 'strikethrough', 'removeformat', 'formatmatch', 'autotypeset', 'blockquote', 'pasteplain', '|', 'forecolor', 'backcolor', 'insertorderedlist', 'insertunorderedlist', 'selectall', 'cleardoc', '|', 'rowspacingtop', 'rowspacingbottom', 'lineheight', '|', 'customstyle', 'paragraph', 'fontfamily', 'fontsize', '|', 'indent', '|', 'justifyleft', 'justifycenter', 'justifyright', 'justifyjustify', '|', 'link', 'unlink', 'anchor', '|', 'simpleupload', 'insertimage', 'scrawl', 'insertvideo', 'attachment', 'map', 'insertcode', '|', 'horizontal', '|', 'preview', 'searchreplace', 'drafts']],
            
                initialContent:'',
                //关闭字数统计
                wordCount:false,
                zIndex:2,
                //关闭elementPath
                elementPathEnabled:false,
                //默认的编辑区域高度
                initialFrameHeight:250
                //更多其他参数，请参考ueditor.config.js中的配置项
                //更多其他参数，请参考ueditor.config.js中的配置项
            });
                        editor.ready(function() {
            	editor.setDisabled();
            	});
                            $("#editor").find("*").css("max-width","362px");
        </script>              </div>
            </div>
                          
    

        
         <div class="layui-form-item">
                <label for="L_vercode" class="layui-form-label">验证码</label>
                <div class="layui-input-inline">
                  <input type="text"  id="code" name="code"   value="" required lay-verify="required" placeholder="图片验证码" autocomplete="off" class="layui-input">
                </div>
                <div class="layui-form-mid">
                  <span style="color: #c00;"><img class="hand" src="https://www.e-learn.cn/qa/user/code.html" onclick="javascript:updatecode();" id="verifycode"><a class="changecode"  href="javascript:updatecode();">&nbsp;看不清?</a></span>
                </div>
              </div>
                                  <div class="layui-form-item">
                    <input type="hidden" value="637554" id="ans_qid" name="qid">
   <input type="hidden" id="tokenkey" name="tokenkey" value=''/>
                <input type="hidden" value="Javascript innerHTML vs outerHTML" id="ans_title" name="title"> 
             
              <div class="layui-btn    layui-btn-disabled"  id="ajaxsubmitasnwer" >提交回复</div>
            </div>
          </form>
        </div>
      </div>
      <input type="hidden" value="637554" id="adopt_qid"	name="qid" /> 
      <input type="hidden" id="adopt_answer" value="0"	name="aid" />
    </div>
    <div class="layui-col-md4">
          
 <!-- 热门讨论问题 -->
     
 <dl class="fly-panel fly-list-one">
        <dt class="fly-panel-title">热议问题</dt>
            <!-- 本周热门讨论问题显示10条-->