global: snapshot

website/scripts/utils/format.js

@@ -24,6 +24,53 @@ export const numberToPercentage = new Intl.NumberFormat("en-US", {
   maximumFractionDigits: 2,
 });
 
+/**
+ * @param {number} value
+ * @param {0 | 2} [digits]
+ */
+export function numberToShortUSFormat(value, digits) {
+  const absoluteValue = Math.abs(value);
+
+  if (isNaN(value)) {
+    return "";
+  } else if (absoluteValue < 10) {
+    return numberToUSNumber(value, Math.min(3, digits || 10));
+  } else if (absoluteValue < 1_000) {
+    return numberToUSNumber(value, Math.min(2, digits || 10));
+  } else if (absoluteValue < 10_000) {
+    return numberToUSNumber(value, Math.min(1, digits || 10));
+  } else if (absoluteValue < 1_000_000) {
+    return numberToUSNumber(value, 0);
+  } else if (absoluteValue >= 1_000_000_000_000_000_000_000) {
+    return "Inf.";
+  }
+
+  const log = Math.floor(Math.log10(absoluteValue) - 6);
+
+  const suffices = ["M", "B", "T", "P", "E", "Z"];
+  const letterIndex = Math.floor(log / 3);
+  const letter = suffices[letterIndex];
+
+  const modulused = log % 3;
+
+  if (modulused === 0) {
+    return `${numberToUSNumber(
+      value / (1_000_000 * 1_000 ** letterIndex),
+      3,
+    )}${letter}`;
+  } else if (modulused === 1) {
+    return `${numberToUSNumber(
+      value / (1_000_000 * 1_000 ** letterIndex),
+      2,
+    )}${letter}`;
+  } else {
+    return `${numberToUSNumber(
+      value / (1_000_000 * 1_000 ** letterIndex),
+      1,
+    )}${letter}`;
+  }
+}
+
 /**
  * @param {string} s
  */