Javascript window.getSelection().focusNode.nodeValue return with HTML

Question

Hy... i dont really want to use other poeple editor...

i want to learn "how to create" not "how to use"

so i decided to create my own editor...

My editor

its easy to create bbcode editor... but when i try to create the HTML Version ( Live Preview & Editing )

i have a little problem ( may be my biggest problem ) Of course making a question is my last hope after searching...

anyway, my english is bad, so i hope you can understand what i'm saying.

Look, My Expectation VS Really

Expectation VS Really

And this is the simplest of my editor

$(document).ready(function(){
 $(".buttonBold").click(function(){
  $(".editableDiv").focus();
  var help_me_anchorNode    = window.getSelection().anchorNode.nodeValue;
  var help_me_anchorOffset   = window.getSelection().anchorOffset
  var help_me_focusOffset   = window.getSelection().focusOffset
  var help_me_focusNodeValueLength  = window.getSelection().focusNode.nodeValue.length;
  var help_me_firstTag    = "<b>";
  var help_me_lastTag    = "</b>";

  if(help_me_anchorOffset > help_me_focusOffset){
   var help_me_firstTag   = "</b>";
   var help_me_lastTag   = "<b>";
  }
  window.getSelection().anchorNode.nodeValue = help_me_anchorNode.slice(0, help_me_anchorOffset) + help_me_firstTag + help_me_anchorNode.slice(help_me_anchorOffset);
  var help_me_focusNodeValue = window.getSelection().focusNode.nodeValue;
  if(window.getSelection().focusNode.nodeValue.length - help_me_focusNodeValueLength > 0) {
   help_me_focusOffset += window.getSelection().focusNode.nodeValue.length - help_me_focusNodeValueLength;
  }
  window.getSelection().focusNode.nodeValue = help_me_focusNodeValue.slice(0, help_me_focusOffset) + help_me_lastTag + help_me_focusNodeValue.slice(help_me_focusOffset);
 });

});

.editableDiv{
 width: 300px;
 height: 100px;
 background: #ccc;
 padding: 10px;
 }

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>

<button class="buttonBold">Bold</button>
<div class="editableDiv" contenteditable="true">
Double click this : HELPME
<br />
<br />
And then, click the "Bold" Button
<br />
The result will : &lt;b&gt;HELPME&lt;/b&gt;
<br />
Not : <b>HELPME</b>
</div>

Answer 1

You can use window.getSelection() and .surroundContents()

$(".buttonBoldHtml").click(function(){
  $(".editableDiv").focus();

  var highlight = window.getSelection(),
      bold = $('<b/></b>')[0],
      range = highlight.getRangeAt(0);
  range.surroundContents(bold);
});

---

If you select partial nodes (when the highlighted text begins or stop between an open tag), you have to use extractContents() :

$(".buttonBoldHtml").click(function(){
  $(".editableDiv").focus();

  var range = window.getSelection().getRangeAt(0),
      bold = document.createElement('b');
  bold.appendChild(range.extractContents());
  range.insertNode(bold);
});

I've edited the demo and added a test with both bold and italic:

Demo