The rule is simple: . It compares both value and type. The == operator tries to be "helpful" by converting types behind your back. That "help" is the source of countless bugs.
Which of these "weird" concepts is giving you the most trouble right now? I can break down a specific one with code examples if you'd like. js the weird parts
console.log(isNaN(NaN)); // true // But wait... console.log(isNaN("hello")); // true (because "hello" can't be a number) The rule is simple: