Optimize null checking

Walson Low （刘维昇） · Walson Low （刘维昇） · commit f97a3dba3298 · 2026-02-20T14:53:24.000+08:00
diff --git a/src/util.ts b/src/util.ts
@@ -118,10 +118,10 @@ export const equal = (a: any, b: any, seen = []): boolean => {
   }
 
   // typeof null is 'object'. If either is null, check if they are equal.
-  if ((a === null || b === null) && a !== b) {
-    return false;
+  if (a === null || b === null) {
+    return a === b;
   }
-  
+
   // If this point has been reached, a and b are either arrays or objects.
 
   if (a instanceof Array) {

Original file line number	Diff line number	Diff line change
`@@ -118,10 +118,10 @@ export const equal = (a: any, b: any, seen = []): boolean => {`
`118`	`118`	`}`
`119`	`119`
`120`	`120`	`// typeof null is 'object'. If either is null, check if they are equal.`
`121`		`- if ((a === null \|\| b === null) && a !== b) {`
`122`		`- return false;`
	`121`	`+ if (a === null \|\| b === null) {`
	`122`	`+ return a === b;`
`123`	`123`	`}`
`124`		`-`
	`124`	`+`
`125`	`125`	`// If this point has been reached, a and b are either arrays or objects.`
`126`	`126`
`127`	`127`	`if (a instanceof Array) {`