Making Selection & Adding tag dynamically in JavaScript

Question

I need some help about JavaScript on iPhone UIWebView;
I have HTML like below:

Answer 1

Since this is a UIWebView, this is Mobile Safari and you can lose a lot of those branches for obtaining the selection. I would suggest using document.execCommand() with the "HiliteColor" command, which is built into the browser and works on the whole selection even when it crosses element boundaries:

var sel = window.getSelection();
if (!sel.isCollapsed) {
    var selRange = sel.getRangeAt(0);
    document.designMode = "on";
    sel.removeAllRanges();
    sel.addRange(selRange);
    document.execCommand("HiliteColor", false, "#ffffcc");
    sel.removeAllRanges();
    document.designMode = "off";
}