feat: improve CacheMap impl (#161)

vagusX · 伊北 · web-flow · commit 83e4ffc11780 · 2021-10-21T19:40:57.000+08:00
* feat: improve `CacheMap` impl

* fix: lint error

Co-authored-by: 伊北 &lt;taian.lta@antgroup.com&gt;
diff --git a/src/hooks/useMobileTouchMove.ts b/src/hooks/useMobileTouchMove.ts
@@ -16,6 +16,7 @@ export default function useMobileTouchMove(
   // Smooth scroll
   const intervalRef = useRef(null);
 
+  /* eslint-disable prefer-const */
   let cleanUpEvents: () => void;
 
   const onTouchMove = (e: TouchEvent) => {
diff --git a/src/utils/CacheMap.ts b/src/utils/CacheMap.ts
@@ -5,8 +5,7 @@ class CacheMap {
   maps: Record<string, number>;
 
   constructor() {
-    this.maps = {};
-    this.maps.prototype = null;
+    this.maps = Object.create(null);
   }
 
   set(key: React.ReactText, value: number) {

Original file line number	Diff line number	Diff line change
`@@ -5,8 +5,7 @@ class CacheMap {`
`5`	`5`	`maps: Record<string, number>;`
`6`	`6`
`7`	`7`	`constructor() {`
`8`		`- this.maps = {};`
`9`		`- this.maps.prototype = null;`
	`8`	`+ this.maps = Object.create(null);`
`10`	`9`	`}`
`11`	`10`
`12`	`11`	`set(key: React.ReactText, value: number) {`