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undefined: In JavaScript, undefined is a primitive value and a type. It is the default value assigned to variables that are declared but not yet...
In JavaScript, hoisting is a behavior where variable and function declarations are moved to the top of their containing scope during the execution...
Everything in JavaScript happens inside an execution context. An execution context is like a big box that contains all the types of code in...
Block Referring to is grouping multiple statements together inside a block (curly braces {}) in JavaScript. This is often done when JavaScript expects...
In React 18 When a user wants to change their name, the process typically involves typing the new name into an input box and then clicking the submit...
Before the async/await keywords, we handled promises like this: const p = new Promise((resolve, reject) => resolve("resolved promise")); p.then((res)...