This means that even if a variable or function is declared at the bottom of a script or inside a block, it will be moved to the top of its respective scope during the compilation phase. This allows you to use a variable or function before it is declared in your code.
However, it's important to note that only the declarations are hoisted, not the assignments or initializations. For example, if you declare a variable and then later assign it a value, the assignment will not be hoisted and will still happen in the order it was written in the code.
It's also worth mentioning that hoisting only applies to functions declared using the function keyword or function expressions, and not to arrow functions or class declarations.