Javascript Check if Key Exists (Exact Code That Works)

Javascript Check if Key Exists (Exact Code That Works) OUTLINE: 00:00:00 Introduction to JavaScript Objects 00:00:18 Methods of Key Verification 00:01:02 Cautionary Note on Key Values Here is the code written out for you: Methods of Exploration The 'in' Operator: This nimble tool returns 'true' if your key dwells within the object or its prototype chain. It's like a swift scout venturing into the object's territory. const treasureChest = { gold: 100, map: true }; if ('gems' in treasureChest) { console.log("Aha! Gems are found!"); } The 'hasOwnProperty()' Method: This method is more meticulous. It returns 'true' only if the key exists directly on the object, ignoring its ancestors in the prototype chain. Think of it as a focused inspector checking only the top layer.