JSFiddle - React, Tailwind, and code Playground

by seong gyun jeon

JavaScript

var a = 'A';
function callby1(a){
a = 'B';
}


var b = [];
function callby2(b){
b.push('A');
}

callby1(a);
callby2(b);

console.log(a);
console.log(b);