javascript check if undefined or null
if( typeof myVar === 'undefined' || myVar === null ){
// myVar is undefined or null
}javascript check if undefined or null
if( typeof myVar === 'undefined' || myVar === null ){
// myVar is undefined or null
}javascript not null
if (variable !== null) {
console.log("Var is NOT null");
}javascript if undefined
if(typeof comment === 'undefined') {
alert('Variable "comment" is undefined.');
} else if(comment === null){
alert('Variable "comment" is null.');
}Copyright © 2021 Codeinu
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