Q:

How to neutralize ' in javascript

var wText = "What's on your mind ?"; 
var dCreate = "<div class='createpost-sec'><textarea class='clicktxt' rows='1' cols='1' placeholder='"+wText+"'/>"+dClear+"</div></div></div>";

When I am appending to html after ' text is missing, Please help me how can I neutralize ' character

A:

You need to encode the string for html.  For instance, single quote should be &#39;.: 
jQuery solution:
function htmlEncode(value){
  //create a in-memory div, set it's inner text(which jQuery automatically encodes)
  //then grab the encoded contents back out.   The div never exists on the page. 
  return $('<div/>').text(value).html();
}

function htmlDecode(value){
  return $('<div/>').html(value).text();
}

Manual solution:
function htmlEscape(str) {
    return String(str)
            .replace(/&/g, '&amp;')
            .replace(/"/g, '&quot;')
            .replace(/'/g, '&#39;')
            .replace(/</g, '&lt;')
            .replace(/>/g, '&gt;');
}

function htmlUnescape(value){
    return String(value)
        .replace(/&quot;/g, '"')
        .replace(/&#39;/g, "'")
        .replace(/&lt;/g, '<')
        .replace(/&gt;/g, '>')
        .replace(/&amp;/g, '&');
}

Source.