How to insert content at the cursor position of Javascript in an editable div
First, enable the edit mode for the DIV.
The Code is as follows:
<Div contenteditable = true id = "divTest"> </div>
Enable the div editing mode by setting contenteditable = true, so that the DIV can input content like the text box.
Don't talk about the topic anymore. The following describes how to obtain or set the cursor position.
Two steps:
① Obtain the cursor position in the DIV
② Change the cursor position
The Code is as follows:
Var cursor = 0; // cursor position
Document. onselectionchange = function (){
Var range = document. selection. createRange ();
Var srcele = range. parentElement (); // get the current element
Var copy = document. body. createTextRange ();
Copy. moveToElementText (srcele );
For (cursor = 0; copy. compareEndPoints ("StartToStart", range) <0; cursor ++ ){
Copy. moveStart ("character", 1); // Changes the cursor position. In fact, we are recording the number of cursor.
}
}
Bind a cursor change event to the document. Used to record the cursor position.
In this way, you can get the cursor position of the DIV.
The Code is as follows:
Function moveEnd (obj ){
LyTXT1.focus ();
Var r = document. selection. createRange ();
// Because the cursor is automatically moved from the current cursor (as if the text box is counted from 0 .) so we need to get the current cursor position, and then we can calculate the number of digits to move, so that we can move the cursor to the desired position.
R. moveStart ('character ', lyTXT1.innerText. length-cursor );
R. collapse (true );
R. select ();
}
Through the above, we can move the cursor in the DIV to the end.
A complete instance
Copy the Code as follows:
<Button type = "button" onclick = "document. getElementById ('test '). focus (); insertHtmlAtCaret ('<B> INSERTED </B>'); "> insert character </button>
<Div contentEditable = "true" style = "height: 50px; border: 2px solid red;" id = "test"> </div>
Function insertHtmlAtCaret (html ){
Var sel, range;
If (window. getSelection ){
// IE9 and non-IE
Sel = window. getSelection ();
If (sel. getRangeAt & sel. rangeCount ){
Range = sel. getRangeAt (0 );
Range. deleteContents ();
// Range. createContextualFragment () wocould be useful here but is
// Non-standard and not supported in all browsers (IE9, for one)
Var el = document. createElement ("div ");
El. innerHTML = html;
Var frag = document. createDocumentFragment (), node, lastNode;
While (node = el. firstChild )){
LastNode = frag. appendChild (node );
}
Range. insertNode (frag );
// Preserve the selection
If (lastNode ){
Range = range. cloneRange ();
Range. setStartAfter (lastNode );
Range. collapse (true );
Sel. removeAllRanges ();
Sel. addRange (range );
}
}
} Else if (document. selection & document. selection. type! = "Control "){
// IE <9
Document. selection. createRange (). pasteHTML (html );
}
}
Let's look at a jquery-based instance.
The Code is as follows:
<! Doctype html public "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<Html xmlns = "http://www.w3.org/1999/xhtml">
<Head>
<Meta content = "text/html; charset = UTF-8" http-equiv = "Content-Type">
<Script type = "text/javascript" src = "http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"> </script>
<Title> contenteditable </title>
<Style>
*{
Margin: 0; padding: 0;
}
. Im-message-area {
Width: 98%;
Padding: 2px;
Height: 75px;
Border: #000 solid 1px;
Background: # fff;
Font: 12px/20px arial, "5b8b4f53 ";
Word-wrap: break-word;
Overflow-y: auto;
Line-height: 1;
}
. Ul {display: none ;}
. Ul li {
Background-color: # CCC;
Width: 50px;
}
</Style>
<Script language = "javascript" type = "text/javascript">
Function inimage (text ){
Var obj = $ (". im-message-area") [0];
Var range, node;
If (! Obj. hasfocus ){
Obj. focus ();
}
If (window. getSelection & window. getSelection (). getRangeAt ){
Range = window. getSelection (). getRangeAt (0 );
Range. collapse (false );
Node = range. createContextualFragment (text );
Var c = node. lastChild;
Range. insertNode (node );
If (c ){
Range. setEndAfter (c );
Range. setStartAfter (c)
}
Var j = window. getSelection ();
J. removeAllRanges ();
J. addRange (range );
} Else if (document. selection & document. selection. createRange ){
Document. selection. createRange (). pasteHTML (text );
}
}
$ (Document). ready (function (){
$ ('# Click'). click (function (){
$ ('. Ul'). show ();
})
$ ('. Ul li'). each (function (){
$ (This). click (function (){
Inimage ($ (this). text ());
})
})
});
</Script>
</Head>
<Body>
<Div contenteditable = "true" id = "im_message_area" class = "im-message-area"> <br> </div>
<A href = "javascript: void (0)" id = "button"> button </a>
<Ul class = "ul">
<Li> (Laugh) </li>
<Li> (CRY) </li>
<Li> (LE) </li>
</Ul>
</Body>
</Html>
