javascript – 将html添加到div而不替换其中的当前内容

我正在尝试使用id upload_results将dhtml添加到div中.这应该可以在不替换div中的当前内容的情况下工作.

守则:(有趣的部分在底部)

<script language="JavaScript">
 function do_show() {
      $("#webcamContainer").fadeIn('');
  }

  webcam.set_hook( 'onComplete', 'my_completion_handler' );

  function do_upload() {
       upload to server
      document.getElementById('upload_results').innerHTML = '<div>Uploading...</div>';
      webcam.upload();
  }

  function my_completion_handler(msg) {
       extract URL out of PHP output
      if (msg.match(/(http\:\/\/\S+)/)) {
          var image_url = RegExp.$1;
           show JPEG image in page
          $("#upload_results").fadeIn('');
          //document.getElementById('upload_results').innerHTML = '<a target="_blank" href="'+image_url+'"><img style="border:#ccc 5px solid;" src="'+image_url+'" width="100px"></a>';// I think here should be something changed
    $('#upload_results').append('<a target="_blank" href="'+image_url+'"><img style="border:#ccc 5px solid;" src="'+image_url+'" width="100px"></a>');      
           reset camera for another shot
          webcam.reset();
      }
      else alert("PHP Error: " + msg);
  }
 </script>


 <div id="upload_results" class="video_header" style="display:none;"></div><!--add data here , without replace current content in div-->

解决方法:

到#upload_results元素的append内容：

$('#upload_results').append('<a target="_blank" href="'+image_url+'"><img style="border:#ccc 5px solid;" src="'+image_url+'" width="100px"></a>');

你也可以使用.innerHTML ='[…]’;但这通常被认为是不好的做法,因为它会覆盖现有的DOM,摧毁现有的侦听器和先前附加到元素的数据.

标签：jquery,javascript,dhtml
来源： https://codeday.me/bug/20190718/1493986.html