JSFiddle - React, Tailwind, and code Playground
JavaScript
var regExp1 = new RegExp("(abc){1,}");
var regExp2 = new RegExp("(abc){1,}", "i");
var regExp3 = /(abc){1,}/i;
alert(regExp1.test('ABCDEF'));
alert(regExp2.test('ABCDEF'));
alert(regExp3.test('ABCDEF'));