set execcommand just for a div_问答_开发者_运维开发者技术经验分享

开发者 https://www.devze.com 2023-02-15 04:33 出处：网络

it has any way for bind execcommand with a div element 开发者_运维知识库not for whole document , i try this :

document.getElementById('div').execcommand(...)

but it has an error :

execcommand is not a function

it has any way for bind the execcommand with just div element not whole document !! i don't like use iframe method .

This is easier to do in IE than other browsers because IE's TextRange objects have an execCommand() method, meaning that a command can be executed on a section of the document without needing to change the selection and temporarily enable designMode (which is what you have to do in other browsers). Here's a function to do what you want cleanly:

function execCommandOnElement(el, commandName, value) {
    if (typeof value == "undefined") {
        value = null;
    }

    if (typeof window.getSelection != "undefined") {
        // Non-IE case
        var sel = window.getSelection();

        // Save the current selection
        var savedRanges = [];
        for (var i = 0, len = sel.rangeCount; i < len; ++i) {
            savedRanges[i] = sel.getRangeAt(i).cloneRange();
        }

        // Temporarily enable designMode so that
        // document.execCommand() will work
        document.designMode = "on";

        // Select the element's content
        sel = window.getSelection();
        var range = document.createRange();
        range.selectNodeContents(el);
        sel.removeAllRanges();
        sel.addRange(range);

        // Execute the command
        document.execCommand(commandName, false, value);

        // Disable designMode
        document.designMode = "off";

        // Restore the previous selection
        sel = window.getSelection();
        sel.removeAllRanges();
        for (var i = 0, len = savedRanges.length; i < len; ++i) {
            sel.addRange(savedRanges[i]);
        }
    } else if (typeof document.body.createTextRange != "undefined") {
        // IE case
        var textRange = document.body.createTextRange();
        textRange.moveToElementText(el);
        textRange.execCommand(commandName, false, value);
    }
}

Examples:

var testDiv = document.getElementById("test");
execCommandOnElement(testDiv, "Bold");
execCommandOnElement(testDiv, "ForeColor", "red");

Perhaps this helps you out:

Example code 1 on this page has the execcommand on a div by using a function. Not sure if that's what you're after? Good luck!

Edit: I figured out how to put the code here :o

<head>
<script type="text/javascript">
    function SetToBold () {
        document.execCommand ('bold', false, null);
    }
</script>
</head>
<body>
      <div contenteditable="true" onmouseup="SetToBold ();">
       Select a part of this text!      
      </div>
</body>

Javascript:

var editableFocus = null;

  window.onload = function() {
    var editableElements = document.querySelectorAll("[contenteditable=true]");

    for (var i = 0; i<editableElements.length; i++) {
      editableElements[i].onfocus = function() {
        editableFocus = this.id;
      }
    };
  }

  function setPreviewFocus(obj){
    editableFocus = obj.id
  }

  function formatDoc(sCmd, sValue) {
    if(editableFocus == "textBox"){
      document.execCommand(sCmd, false, sValue); 
    }
  }

HTML:

<div id="textBox" contenteditable="true">
Texto fora do box
</div>

<div contenteditable="true">
Texto fora do box
</div>

<button title="Bold" onclick="formatDoc('bold');">Bold</button>

You can keep it Simple, and add this to your div.

<div contenteditable="true" onmouseup="document.execCommand('bold',false,null);">

set execcommand just for a div

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