what or in js code example

Example 1: and operator in javascript

//&& returns true if both values are true
//or returns the second argument if the first is true
var a = true
var b = ""
var c = 1

true && "" //""
"" && 1 //""
false && 5 //false

Example 2: jquery AND operation

$('[myc="blue"][myid="1"][myid="3"]');