typeof function js code example
Example 1: javascript find type of variable
> typeof "foo"
"string"
> typeof true
"boolean"
> typeof 42
"number"
if(typeof bar === 'number') {
}
Example 2: type of javascript
if (typeof(value) !== "undefined") {
}
Example 3: js typeof number
console.log(typeof 93);
console.log(typeof 'Maximum');
console.log(typeof false);
console.log(typeof anUndeclaredVariable);
Example 4: check data type in javascript
typeof("string");
typeof(123);
Example 5: javascript check type of variable var
typeof "hello"
var a = 1;
typeof(a);
Example 6: javascript typeof
exports.is = (data) => {
const isArray = Array.isArray(data) && 'array'
const isObject = data == {} && 'object'
const isNull = data == null && 'null'
const isGrouping = isArray || isObject || isNull
const isCheck = !isGrouping ? typeof data : isGrouping
const isTypeData = ['number','string','array','symbol','object','undefined','null','function', 'boolean']
const isMatch = isTypeData.indexOf(isCheck)
const isResult = isTypeData[isMatch]
return isResult
}