1 files changed, 39 insertions, 0 deletions
diff --git a/src/utils/number-formatting.ts b/src/utils/number-formatting.ts
new file mode 100644
index 0000000..8e9ef71
--- /dev/null
+++ b/src/utils/number-formatting.ts
@@ -0,0 +1,39 @@
+/**
+ * Normalizes and makes sure we include some unicode option for number formating.
+ */
+function localeWithOptionsForNumbers(locale: string) {
+    locale = locale.toLowerCase().replace('_', '-');
+
+    if (locale === 'hi-in') {
+        // nu-latn makes the formatter use latin numbers.
+        // See BCP47 Unicode extensions for number (nu):
+        // http://unicode.org/repos/cldr/trunk/common/bcp47/number.xml
+        // TL;DR -u- means the start of unicode extension.
+        // nu-latn means numeric (nu) extension, latn value
+        return 'hi-in-u-nu-latn';
+    } else if (locale === 'my') {
+        // For the `my` locale, we want to display functional numbers as Latin numerals rather than in Burmese,
+        // so we are overriding the locale to give us the Latin functional numbers. See radar for more context:
+        // rdar://155236306 (LOC: MS-MY: ASOTW | Product Page: Functional: Numbers are not displayed in MS/EN format)
+        return 'my-u-nu-latn';
+    }
+
+    return locale;
+}
+
+/**
+ * Abbreviate a number into a compact shorthand
+ *
+ * @example
+ * const abbr = abbreviateNumber(10_000, 'en-US'); // '10K'
+ */
+export function abbreviateNumber(value: number, locale: string): string {
+    const formatter = new Intl.NumberFormat(
+        localeWithOptionsForNumbers(locale),
+        {
+            notation: 'compact',
+        },
+    );
+
+    return formatter.format(value);
+}