将文本插入到由iframe外部的按钮触发的Designmode iframe中

Question

I have an editable iframe and I would like to insert text at the cursor location when the user clicks a button that is outside the iframe. I am trying to use the following code to insert the text:

function insertAtCursor(iframename, text, replaceContents) {
      if(replaceContents==null){replaceContents=false;}
      if(!replaceContents){//collapse selection:
         var sel=document.getElementById(iframename).contentWindow.getSelection()
         sel.collapseToStart()
      }
      document.getElementById(iframename).contentWindow.document.execCommand('insertHTML', false,     text);
};

I think that this is failing because the focus changes when I go to click the button. However, I am not sure how to correct this. Thank you for your help.

Answer 1

You're correct about the focus shift affecting your code insert.

Using the jQuery library, you can shift focus back to the iframe in the button's click binding:

$('#button').click(function(event) {
    event.preventDefault();
    $('#iframe').focus();
    insertAtCursor('iframe', 'test-text', null);
});

In pure javascript, shift focus before executing insertAtCursor() like so:

document.getElementById('iframe').focus()