There are 3 main types of scopes that provide distinct behavior: global scope, block scope and function scope. Each scope expects different things and has unique rules when it comes to variable definitions.

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Except that the value of the hoisted variable is now undefined — it did not retain its original value. Only its definition was hoisted.

• Only its definition was hoisted. In other words, only its name.
• But try not to rely on it when writing code.
• It just prevents reference error bugs.

Except that the value of the hoisted variable is now undefined — it did not retain its original value. Only its definition was hoisted. In other words, only its name. Think of hoisting is like a safety feature. But try not to rely on it when writing code. It just prevents reference error bugs.

At this point you might want to know that variables defined inside a function will be limited only to the scope of that function. Trying to access them outside of the function will result in a reference error. You may not retain the value of a hoisted variable in global scope, but you will still save your program from generating an error and halting execution flow.

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Except that the value of the hoisted variable is now undefined — it did not retain its original value. Only its definition was hoisted. In other words, only its name. Think of hoisting is like a safety feature. But try not to rely on it when writing code. It just prevents reference error bugs.

You may not retain the value of a hoisted variable in global scope, but you will still save your program from generating an error and halting execution flow.

Thankfully, hoisting in JavaScript is automatic. When writing your program more than half of the time, you won’t even need to think about it. Ambitioni dedisse scripsisse iudicaretur. Cras mattis iudicium purus sit amet fermentum. Donec sed odio operae, eu vulputate felis rhoncus.

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