jQuery method to insert text into textarea at the cursor position

jQuery method to insert text into textarea at the cursor position_jquery

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Release： 2016-05-16 15:52:35

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The example in this article describes how jQuery inserts text into the textarea at the position of the cursor. Share it with everyone for your reference. The specific implementation method is as follows:

<html>
<head>
<script src="jquery-1.8.1.min.js"></script>
<script >
$(function() {
 /* 在textarea处插入文本--Start */
 (function($) {
 $.fn.extend({
   insertContent : function(myValue, t) {
   var $t = $(this)[0];
   if (document.selection) { // ie
    this.focus();
    var sel = document.selection.createRange();
    sel.text = myValue;
    this.focus();
    sel.moveStart('character', -l);
    var wee = sel.text.length;
    if (arguments.length == 2) {
    var l = $t.value.length;
    sel.moveEnd("character", wee + t);
    t <= 0 &#63; sel.moveStart("character", wee - 2 * t - myValue.length) : sel.moveStart( "character", wee - t - myValue.length);
    sel.select();
    }
   } else if ($t.selectionStart
    || $t.selectionStart == '0') {
    var startPos = $t.selectionStart;
    var endPos = $t.selectionEnd;
    var scrollTop = $t.scrollTop;
    $t.value = $t.value.substring(0, startPos)
     + myValue
     + $t.value.substring(endPos,$t.value.length);
    this.focus();
    $t.selectionStart = startPos + myValue.length;
    $t.selectionEnd = startPos + myValue.length;
    $t.scrollTop = scrollTop;
    if (arguments.length == 2) {
    $t.setSelectionRange(startPos - t,
     $t.selectionEnd + t);
    this.focus();
    }
   } else {
    this.value += myValue;
    this.focus();
   }
   }
  })
 })(jQuery);
 /* 在textarea处插入文本--Ending */
});
$(document).ready(function(){
 $("#ch_button").click( function () { 
 $("#test_in").insertContent("<upload/day_140627/201406271546349972.jpg>"); 
 });
});
</script>
</head>
<body >
<button id="ch_button" value="插入" >插入</button>
<textarea name="content" id="test_in" rows="30" cols="100">
</textarea>
</body>
</html>

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I hope this article will be helpful to everyone’s jQuery programming.