If JavaScript waited for each task, your app would freeze. Instead, it continues running other code while waiting. A Promise represents a value that arrives in the future. A Promise has three states: ...

𝗬𝗼𝘂𝗿 𝗣𝗮𝗴𝗲 𝗟𝗼𝗮𝗱𝘀 𝗙𝗮𝘀𝘁 𝗯𝘂𝘁 𝗦𝘁𝗶𝗹𝗹 𝗙𝗲𝗲𝗹𝘀 𝗦𝗹𝗼𝘄? Your Lighthouse report is green. Your LCP and CLS scores look good. Your page loads fast. Then your real world scores drop.

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