JSFiddle - React, Tailwind, and code Playground

by rexonms

JavaScript

const addTwoNumbers = (x) => (y) => x + y;
const addThree = addTwoNumbers(3);
const addFive = addTwoNumbers(5);
console.log('addThree 5', addThree(5));
console.log('addFive 5', addFive(5));


var counter = (() => {
  var privateCounter = 0;
  function changeBy(val) {
    privateCounter += val;
  }
  return {
    increment: function() {
      changeBy(1);
    },
    decrement: function() {
      changeBy(-1);
    },
    value: function() {
      return privateCounter;
    }
  };
})();

console.log(counter.value()); // logs 0
counter.increment();
counter.increment();
// counter.changeBy(20);
console.log(counter.value()); // logs 2
counter.decrement();
console.log(counter.value()); // logs 1