check type javascript
console.log(typeof "how are you?")
"string"
console.log(typeof false) / console.log(typeof true)
"boolean"
console.log(typeof 100)
"number"
check type javascript
console.log(typeof "how are you?")
"string"
console.log(typeof false) / console.log(typeof true)
"boolean"
console.log(typeof 100)
"number"
check data type in javascript
typeof("string"); //string
typeof(123); //number
type of javascript
//typeof() will return the type of value in its parameters.
//some examples of types: undefined, NaN, number, string, object, array
//example of a practical usage
if (typeof(value) !== "undefined") {//also, make sure that the type name is a string
//execute code
}
check data type in js
typeof("iAmAString");//This should return 'string'
//NO camelCase, as it is a JS Keyword
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());
javascript check type of variable var
> typeof "foo"
"string"
> typeof true
"boolean"
> typeof 42
"number"
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