Use the jQuery .length property
The jQuery .length property can be used to get or find out the number of characters in a string. You can also use this property to calculate the number of elements in a jQuery object.
Let's take a look at an example to understand how it basically works:
<script>
$(document).ready(function(){
var myStr = " Paragraph of text with multiple white spaces before and after. ";
myStr.length; // Returns 81
$.trim(myStr).length; // Returns 68
myStr.replace(/ /g,'').length; // Returns 53
});
</script>
