NextJS Ecommerce - Brad Traversy

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new Promise((resolve) => setTimeout(resolve, ms))

  resolve is the function that tells a JavaScript Promise : “This async task is finished successfully.” In your code: const delay = (ms: number) => new Promise((resolve) => setTimeout(resolve, ms)); here’s what happens step-by-step: new Promise(...) creates a promise. JavaScript automatically provides a function called resolve . setTimeout(resolve, ms) waits ms milliseconds. After the timer finishes, resolve() is called. Calling resolve() marks the promise as completed. So this: delay(1000) creates a promise that resolves after 1 second. Example: delay(1000).then(() => { console.log("1 second passed"); }); or with async/await : await delay(1000); console.log("done"); You can think of it like this: new Promise((resolve) => { // do async work resolve(); // finish successfully }); resolve is just a parameter name. You could rename it: new Promise((finish) => { setTimeout(finish, ms); }); but resolve is the standard convention. https://...
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min-h-screen in Tailwind CSS

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Ecommerce with JS

 Not quite. It works for many numbers, but there are some edge cases. Your function: export function round2(value: number | string) { if (typeof value === 'number') { return Math.round((value + Number.EPSILON) * 100) / 100; } else if (typeof value === 'string') { return Math.round((Number(value) + Number.EPSILON) * 100) / 100; } else { throw new Error('Value is not a number or string'); } } What it does well round2(1.234); // 1.23 round2(1.235); // 1.24 round2("12.345"); // 12.35 The Number.EPSILON trick helps with some floating-point issues: Math.round(1.005 * 100) / 100 // 1 round2(1.005) // 1.01 What it doesn't guarantee Invalid strings round2("abc") // NaN No error is thrown because "abc" is still a string. You may want: const num = Number(value); if (Number.isNaN(num)) { throw new Error("Invalid number"); } Very large numbers Floating-point precision limits still apply: round2(12345...
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