typedjs

                                    yarn add typed.js
// or
npm install typed.js
// or
bower install typed.js

// in js file:
import Typed from 'typed.js';

const options = {
  strings: ['<i>First</i> sentence.', '& a second sentence.'],
  typeSpeed: 40
};

const typed = new Typed('.element', options);

                                    > typeof "foo"
"string"
> typeof true
"boolean"
> typeof 42
"number"

                                    <script src="https://cdn.jsdelivr.net/npm/[email protected]"></script>

                                    // Can also be included with a regular script tag
import Typed from 'typed.js';

var options = {
  strings: ['<i>First</i> sentence.', '& a second sentence.'],
  typeSpeed: 40
};

var typed = new Typed('.element', options);

                                    //String Data Type
var strSingle = 'John'; //String with single quotes
var strDouble = "Bob"; //String with double quotes

//Number Data Type
var num = 25; //Integer
var flo = 80.5; //Floating-point number
var exp = 4.25e+6; //Exponential notation, this equates to 4250000

//Boolean Data Type
var isReading = true; //Yes, I'm reading
var isSleeping = false; //No, I'm not sleeping

//Undefined Data Type
var undef; //If a value is never assigned, any output will be 'undefined'

//Null Data Type
var noValue = null; //Null meaning that it is has no value, not the same as 0 or ""

//Object Data Type
var emptyObject = {};
var person = {"name": "Clark", "surname": "Kent", "age": "36"}; //The quotes around the propety name can be omitted if the property name is a valid JS name
var car = { //Same as person but easier to read
	model: "BMW X3", //Example with quotes around property name ommitted
	color: "white",
	doors: 5
}

//Array Data Type
var emptyArray = []; //An array can be of any data types (string, number, boolean, etc.)
var array = ["One", "Two"] //String array, note the index of the first element is 0

//Function Data Type
var func = function() { //Calling the function: func();
  alert("Code excuted"); //Outputs: Code executed
}

var funcVar = function(amount) { //Calling the function: funcVar(6); 
  alert("Code excuted " + amount + " times"); //Outputs: Code executed 6 times (if input was 6)
}

//Typeof Operator
typeof variable; //Returns the data type of the variable