Hoisting

Hoisting means - moving the declaration to the top. There are three types of hoisting:

1. Value hoisting

• Can use the variable in its scope before the line its declared.
• function, function, async function, async function**

2. Declaration hoisting

• Only the declaration is hoisted, means it can be accessed before the declaration line and will not give ReferenceError , but the value is always Undefined.
• var

3. No Hoisting

• OR Technically Hoisted but will give ReferenceError if accessed before its declaration, So it can be simply called No Hoisting
• The zone until variable can't be accessed is called the Temporal Dead Zone - TDZ
• let, const, functions expressions