In JavaScript, typeof null famously returns "object" , which is a historical bug. To verify that a variable is a non-null object (and not an array or other primitive), use a combined check: javascript
const isRealObject = (val) => typeof val === 'object' && val !== null && !Array.isArray(val); if (isRealObject(myObject)) { // Safely work with object properties } Use code with caution. Copied to clipboard 4. Simple Truthiness Check How to check if a Variable Is Not Null in JavaScript Check If Object Is Not Null In Javascript
Often, you want to ensure a variable is neither null nor undefined . Using the loose inequality operator ( != ) covers both at once. javascript In JavaScript, typeof null famously returns "object" ,
However, because of how JavaScript handles different "empty" types, the best approach depends on whether you also want to exclude undefined or ensure the variable is actually a valid object. 1. Strict Not-Null Check Simple Truthiness Check How to check if a
To check if an object is not null in JavaScript, use the strict inequality operator: if (myObject !== null) .