JSFiddle - React, Tailwind, and code Playground

JavaScript

function func(a,b,c) {
    console.log(a,b,c);
    return '';
}

var t1 = 'testing'.replace(/e/, func); // works
console.log('t1 = ' + t1);
var t2 = 'testing'.replace(/e/, func.call); // doesn't work
console.log('t2 = ' + t2);