node js check for undefined code example
Example 1: js if not undefined
if (typeof myVar !== "undefined") {
console.log("myVar is DEFINED");
}Example 2: How can I check whether a variable is defined in Node Js
if (query){
doStuff();
}if (typeof myVar !== "undefined") {
console.log("myVar is DEFINED");
}if (query){
doStuff();
}