更改Delete / Backspace键的功能

Question

I have a function that wraps selected text in a span when the delete key is pressed. The class of the span is red with a line-through, to show it's been "deleted."

CSS:

     .deleted {
     text-decoration:line-through;
     color:red;
       }

JavaScript:

    $(document).keydown(function(e) {
      (e) ? keycode = e.keyCode : keycode = event.keyCode;
      if (keycode == 8 || 46) {
        var span = document.createElement("span");
        span.className = "deleted";
        if (window.getSelection) {
           var sel = window.getSelection();
           if (sel.rangeCount) {
              var range = sel.getRangeAt(0).cloneRange();
              range.surroundContents(span);
              sel.removeAllRanges(); 
              sel.addRange(range);
              }
           } 
        }
     });

This is a contenteditable text, so when I press the delete key, naturally it deletes the selected text, but still creates the <span> element. Is there any way to disable the traditional function of the delete key so that the text remains but still wraps with the <span> ?

Answer 1

e.preventDefault() should work.

Also, you should use the <del> HTML element instead of <span> with a class attached.

Test out this testcase: https://jsfiddle.net/jdshq796/

Answer 2

You need to stop the the default action of the event.

You need to add e.preventDefault() into your code that insure that default action of the event will not be triggered.

$(document).keydown(function(e) {
       e.preventDefault();
      (e) ? keycode = e.keyCode : keycode = event.keyCode;
      if (keycode == 8 || 46) {
        var span = document.createElement("span");
        span.className = "deleted";
        if (window.getSelection) {
           var sel = window.getSelection();
           if (sel.rangeCount) {
              var range = sel.getRangeAt(0).cloneRange();
              range.surroundContents(span);
              sel.removeAllRanges(); 
              sel.addRange(range);
              }
           } 
        }
     });