Answers for "javascript null or undefined"

Javascript

js if not undefined

if (typeof myVar !== "undefined") {
    console.log("myVar is DEFINED");
}

Posted by: Guest on October-23-2019

javascript check if undefined or null

if( typeof myVar === 'undefined' || myVar === null ){
    // myVar is undefined or null
}

Posted by: Guest on October-23-2019

javascript check for null variables

var myVar=null;

if(myVar === null){
    //I am null;
}

if (typeof myVar === 'undefined'){
    //myVar is undefined
}

Posted by: Guest on August-01-2019

javascript check undefined or null

var myVar=null;

if(myVar === null){
    //I am null;
}

if (typeof myVar === 'undefined'){
    //myVar is undefined
}

Posted by: Guest on December-22-2020

null undefined javascript

Undefined  used for unintentionally missing values.

Null       used for intentionally missing values.

Posted by: Guest on August-17-2020

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