What is Debouncing and Throttling in JavaScript?

Let's take an example of a 𝘀𝗵𝗼𝗽𝗽𝗶𝗻𝗴 𝗰𝗮𝗿𝘁 web app so that there will be a 𝗰𝗵𝗲𝗰𝗸𝗼𝘂𝘁 𝗯𝘂𝘁𝘁𝗼𝗻 𝘁𝗼 𝗽𝗹𝗮𝗰𝗲 𝗮𝗻 𝗼𝗿𝗱𝗲𝗿 𝗶𝗳 𝗮 𝘂𝘀𝗲𝗿 𝗮𝗰𝗰𝗶𝗱𝗲𝗻𝘁𝗮𝗹𝗹𝘆 𝗰𝗹𝗶𝗰𝗸𝘀 𝘁𝗵𝗲 𝗯𝘂𝘁𝘁𝗼𝗻 𝘁𝘄𝗶𝗰𝗲 𝘁𝗵𝗲𝗻 𝗶𝘁 𝘄�...