[React.js] const & let

March 31, 2018 | 0 Minute Read

This post is focused on my personal React.js study

Description

• var helloWorld = “Hello Jin” « Possible, but not in common way
• In ES6 java-script variable decleration begins with const or let

const

• Impossible. const variable can not be changed after decleration.

const helloWorld = “ Welcome to React world”

hellowWorld = “Welcome Jin”

• following code is a possible way.

const helloWorld = { text: ‘Hello’ };

helloWorld.text = ‘Hi’;

let

• following code is a possible way

let helloWorld = “ Welcome to React world” hellowWorld = “Welcome Jin”