Is there a standard function to check for null, undefined, or blank variables in JavaScript

Is there a standard function to check for null, undefined, or blank variables in JavaScript

No there is not a standard function to check for null, undefined or blank values in JavaScript. However, there is the concept of truthy and falsy values in JavaScript. Values that coerce to true in conditional statements are called truth values. Those that resolve to false are called falsy. ⬇️