Melbin Koshymelbin.hashnode.dev·Dec 23, 20235 Concepts every JavaScript Developer must know1. Strict Mode Strict mode, first introduced with ECMAScript5(ES5), allows developers to opt-in to a restricted variant of JavaScript. When enabled, the JavaScript runtime imposes a set of constraints and behaviors that help catch common coding mista...JavaScriptAdd a thoughtful commentNo comments yetBe the first to start the conversation.