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check type javascript

console.log(typeof "how are you?")
"string"
console.log(typeof false) / console.log(typeof true)
"boolean"
console.log(typeof 100)
"number"
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javascript type checking

var trueTypeOf = function (obj) {
	return Object.prototype.toString.call(obj).slice(8, -1).toLowerCase();
};

// Returns "array"
trueTypeOf([]);

// Returns "date"
trueTypeOf(new Date());
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