Why is null an object and what's the difference between null and undefined?

Why is null an object and what's the difference between null and undefined?

javascript object null undefined typeof

javascript

What is the difference between typeof and instanceof and when should one be used vs. the other?

javascript instanceof typeof

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Why does typeof array with objects return "object" and not "array"? [duplicate]

javascript jquery arrays object typeof

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typeof for RegExp

javascript regex constructor instanceof typeof

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Testing if value is a function

javascript typeof onsubmit

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JavaScript: detect if argument is array instead of object (Node.JS)

javascript arrays object node.js typeof

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Why is undefined not writable in JavaScript?

javascript typeof

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Why does "typeof" not need parentheses? [closed]

javascript typeof

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How to efficiently check if variable is Array or Object (in NodeJS & V8)?

javascript node.js v8 instanceof typeof

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_.isFunction(a) vs. typeof a === 'function'? javascript

javascript performance underscore.js typeof

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How to check if an object is not an array?

javascript types typeof

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Why does Array.filter(Number) filter zero out in JavaScript?

javascript numbers typeof

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What's the point of new String("x") in JavaScript?

javascript string types instanceof typeof

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how to tell if a javascript variable is a function

javascript typeof

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How can I get the name of function inside a JavaScript function?

javascript function typeof

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