Basics If-Then Syntax for JS/JQuery

# standard syntax on JS

$(document).ready(function(){ 

var n = $("#example div").length;

if (n < 2) {
$("body").css("background", "green");
} 
else {
$("body").css("background", "orange");
}

});


# this is the shorthand version


var n = $("#example div").length;

$("body").css("background", (n < 2) ? "green" : "orange");


# Checking if selector exists. When you use a selector, jQuery will always return an object. Therefore the if statement will always be true and never be false. So change it to this:


if ($("#mydiv").length > 0) {

  // do something here

 }