javascript - How to prevent accidental deletion of contenteditable ul in IE10? -

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i want have contenteditable ul on page. however, in internet explorer 10, if click it, select either right click menu or ctrl+a, delete, ul element gets deleted off page.

what best way prevent this, or @ least detect when happens , insert replacement ul?

i'd suggest intercepting delete , backspace keys , doing delete manually. steps are:

  • get selected range
  • adjust ends of range lie within editable <ul> element if outside
  • call deletecontents() on range.

note following won't work on ie <= 8. if need support browsers, use rangy library, used simplify deleteselectedcontent() slightly.

demo: http://jsfiddle.net/timdown/stcxa/3/

code:

var editor = document.getelementbyid("editor");  function deleteselectedcontent() {     if (window.getselection) {         var sel = window.getselection();         if (sel.rangecount > 0) {             var range = sel.getrangeat(0);             var editorrange = range.clonerange();             editorrange.selectnodecontents(editor);              // adjust selection range boundaries             if (range.compareboundarypoints(range.start_to_start, editorrange) == -1) {                 range.setstart(editorrange.startcontainer, editorrange.startoffset);             }             if (range.compareboundarypoints(range.end_to_end, editorrange) == 1) {                 range.setend(editorrange.endcontainer, editorrange.endoffset);             }              range.deletecontents();         }     } }  editor.addeventlistener("keydown", function(evt) {     if (window.getselection &&             !window.getselection().iscollapsed &&             (evt.keycode == 8 || evt.keycode == 46)) {         evt.preventdefault();         deleteselectedcontent();     } }, false);

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