js is undefined or null
var myVar=null;
if(myVar === null){
//I am null;
}
if (typeof myVar === 'undefined'){
//myVar is undefined
}js is undefined or null
var myVar=null;
if(myVar === null){
//I am null;
}
if (typeof myVar === 'undefined'){
//myVar is undefined
}null vs undefined
//loosely equal (compare values between two variables)
null == undefined // true ( null => 0 , undefined => NAN)
//strictly not equal (compare both type and value)
null === undefined // false (typeof null => object , typeof undefined => undefined)
null !== undefined // true (typeof null => object , typeof undefined => undefined)Copyright © 2021 Codeinu
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