Web Reference: Oct 28, 2025 · JavaScript is unique to have two nullish values: null and undefined. Semantically, their difference is very minor: undefined represents the absence of a value, while null represents the absence of an object. JavaScript is very flexible with regards to checking for "null" values. I'm guessing you're actually looking for empty strings, in which case this simpler code will work: Which will check for empty strings (""), null, undefined, false and the numbers 0 and NaN. The typeof Operator You can use the JavaScript typeof operator to find the type of a JavaScript variable. The typeof operator returns the type of a variable or an expression:
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28 Javascript Null Type Net Worth 2026: Salary, Income & Wealth Net Worth & Biography
Estimated Worth: $86M - $116M
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Last Updated: April 6, 2026
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