javascript check not null or undefined code example
Example 1: javascript check if undefined or null
if( typeof myVar === 'undefined' || myVar === null ){
}
Example 2: javascript check if not null
if (myVar !== null) {...}
if (myVar) {...}
Example 3: javascript check for null variables
var myVar=null;
if(myVar === null){
}
if (typeof myVar === 'undefined'){
}
Example 4: javascript check if undefined or null or empty string
if (myString) {
}
Example 5: javascript check undefined or null
var myVar=null;
if(myVar === null){
}
if (typeof myVar === 'undefined'){
}