Add Knip (#16653)

website/playground/BottomBar.js

@@ -1,14 +0,0 @@
-import * as React from "react";
-import * as ReactDOM from "react-dom";
-
-const root = document.getElementById("bottom-bar");
-
-export default function BottomBar({ left, right }) {
-  return ReactDOM.createPortal(
-    <React.Fragment>
-      <div className="bottom-bar-buttons">{left}</div>
-      <div className="bottom-bar-buttons bottom-bar-buttons-right">{right}</div>
-    </React.Fragment>,
-    root,
-  );
-}

website/playground/sidebar/options.js

@@ -2,7 +2,7 @@ import * as React from "react";
 
 import { Checkbox, NumberInput, Select } from "./inputs.js";
 
-export function BooleanOption({ option, value, onChange }) {
+function BooleanOption({ option, value, onChange }) {
   function maybeInvert(value) {
     return option.inverted ? !value : value;
   }
@@ -16,7 +16,7 @@ export function BooleanOption({ option, value, onChange }) {
   );
 }
 
-export function ChoiceOption({ option, value, onChange }) {
+function ChoiceOption({ option, value, onChange }) {
   return (
     <Select
       label={option.cliName}
@@ -28,7 +28,7 @@ export function ChoiceOption({ option, value, onChange }) {
   );
 }
 
-export function NumberOption({ option, value, onChange }) {
+function NumberOption({ option, value, onChange }) {
   return (
     <NumberInput
       label={option.cliName}

website/playground/util.js

@@ -118,27 +118,3 @@ export function convertOffsetToSelection(offset, content) {
   }
   return { anchor: { line, ch } };
 }
-
-/**
- * Copied from https://github.com/prettier/prettier/blob/6fe21780115cf5f74f83876d64b03a727fbab220/src/cli/utils.js#L6-L27
- * @template Obj
- * @template Key
- * @param {Array<Obj>} array
- * @param {(value: Obj) => Key} iteratee
- * @returns {{[p in Key]: T}}
- */
-export function groupBy(array, iteratee) {
-  const result = Object.create(null);
-
-  for (const value of array) {
-    const key = iteratee(value);
-
-    if (Array.isArray(result[key])) {
-      result[key].push(value);
-    } else {
-      result[key] = [value];
-    }
-  }
-
-  return result;
-}