Grabbed dndbeyond's source code

```
~/go/bin/sourcemapper -output ddb -jsurl https://media.dndbeyond.com/character-app/static/js/main.90aa78c5.js
```

ddb_main/packages/rules-engine/es/engine/Dice/renderers.js

@@ -0,0 +1,35 @@
+import { groupBy } from 'lodash';
+import { FormatUtils } from '../Format';
+import { getCount, getFixedValue, getValue } from './accessors';
+/**
+ * Formats the specified dice to be a human readable string
+ * @param dice The dice that should be formatted
+ */
+export function renderDice(dice) {
+    if (Array.isArray(dice)) {
+        const diceGroups = groupBy(dice.map((die) => renderDie(die)));
+        return Object.keys(diceGroups)
+            .map((key) => `${key}${diceGroups[key].length > 1 ? ` (${diceGroups[key].length})` : ''}`)
+            .join(', ');
+    }
+    return renderDie(dice);
+}
+/**
+ * Formats the specified die to be a human readable string.
+ * @param die The die that should be formatted
+ */
+export function renderDie(die) {
+    if (die === null) {
+        return '';
+    }
+    const diceCount = getCount(die);
+    const diceValue = getValue(die);
+    const fixedValue = getFixedValue(die);
+    if (diceValue && diceCount) {
+        return `${diceCount}d${diceValue}${fixedValue ? FormatUtils.renderSignedNumber(fixedValue) : ''}`;
+    }
+    if (!diceValue && !diceCount && fixedValue) {
+        return FormatUtils.renderLocaleNumber(fixedValue);
+    }
+    return '';
+}