javascript - Highlight text of given position inside div tags -


i have position of selected word using below code:

function getselectioncharoffsetswithin(element) {      var start = 0,      end = 0;    var sel, range, priorrange;    if (typeof window.getselection != "undefined") {        range = window.getselection().getrangeat(0);      priorrange = range.clonerange();        priorrange.selectnodecontents(element);      priorrange.setend(range.startcontainer, range.startoffset);      start = priorrange.tostring().length;      end = start + range.tostring().length - 1;      } else if (typeof document.selection != "undefined" &&      (sel = document.selection).type != "control") {      range = sel.createrange();      alert(range);      priorrange = document.body.createtextrange();      priorrange.movetoelementtext(element);      priorrange.setendpoint("endtostart", range);      start = priorrange.text.length;      end = start + range.text.length;      }    return {      start: start,      end: end    }  }    function alertselection() {    var maindiv = document.getelementbyid("myclass");    var sel = getselectioncharoffsetswithin(maindiv);    alert(sel.start + ": " + sel.end);  }
<div id="myclass" onmouseup="alertselection()">    <p>this highlight text demo.</p>  </div>

what want highlight text of position in html text. whatever position give text must highlight in content. if user refresh page should not disappear.


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