Question

您好我已经编写了这个JS脚本来捕获TAB按键捕获。它捕获并在＆＃34; pre＆＃34;中的当前指针位置插入\ t。标签

$m = jQuery.noConflict();
    $m(document).keydown(function(event) {

    var keyCode = event.which;
      if(keyCode == 9) { 
           // alert(); if this is there the code works, but if i remove this the code doesn't work, i dont want to alert user every time he hits TAB

        // get caret position/selection
            var start = this.selectionStart;
            var end = this.selectionEnd;

            var $this = $m(this);
            var value = $this.val();

            // set textarea value to: text before caret + tab + text after caret
            $this.val(value.substring(0, start)
                    + "\t"
                    + value.substring(end));

            // put caret at right position again (add one for the tab)
            this.selectionStart = this.selectionEnd = start + 1;

            // prevent the focus lose
            event.preventDefault();
      }
    });

<div class="masterContainer" onclick="setFocusDiv();">
            <div class="lined"></div>
            <pre id="inputId" class="nonlined" contenteditable="true" onkeyup="setLineNu();" onfocus="setLineNu();"></pre>
        </div>

但我的问题是，当我在脚本中插入一个警报时，它完全正常工作并插入\ t但是当我删除警报时它不起作用。此外还有焦点事件，但在TAB媒体报道后焦点丢失。

Answer 1

您需要在preventDefault()而不是event

上致电this

TAB按键捕获无法正常工作

1 个答案: