Polyfill (programming)

A polyfill is like a teacher who helps make sure everyone in class understands the same thing, even if they don't have the same things at home.

Sometimes, some older computer programs or web browsers might not have the same things as newer ones. For example, your computer at home might only have a certain type of crayon, let's say red, but your friend's computer might have a box of crayons with lots of colors. If a program or website needs a specific tool or color that your computer doesn't have, it might not work properly or look right.

That's where a polyfill comes in! A polyfill is a special piece of code that can make sure that everyone, no matter what computer or browser they are using, can see and use everything the way it's supposed to work.

So it's like the teacher going to each child's desk and giving them the right tool or color to make sure they can all complete the same art project, even if they don't have the same materials at home. A polyfill helps make sure the program or website works right for everyone.