In this Article we will go through how to get type of a variable in string only using single line of code in JavaScript.
This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function.
Let's define this short function:
const getTypeOf = obj => Object.prototype.toString.call(obj).match(/\[object (.*)\]/)[1];
getTypeOf('hello world'); // String
getTypeOf(1000); // Number
getTypeOf(Infinity); // Number
getTypeOf(true); // Boolean
getTypeOf(Symbol()); // Symbol
getTypeOf(null); // Null
getTypeOf(undefined); // Undefined
getTypeOf({}); // Object
getTypeOf([]); // Array
getTypeOf(/[a-z]/g); // RegExp
getTypeOf(new Date(2021)); // Date
getTypeOf(new Error()); // Error
getTypeOf(function() {}); // Function
getTypeOf((a, b) => a + b); // Function
getTypeOf(async () => {}); // AsyncFunction
getTypeOf(document); // HTMLDocument