JSFiddle - React, Tailwind, and code Playground

JavaScript

var str = '{$ for ( var i = 0, len = O.length; i < len; i++ ) { $}';
var reg = /\{\$(.*?)\$\}/g;
for (var i = 0; i < 3; i++){
    var result = reg.exec(str);
    console.log(result);
    console.log(!!result);
}