perf(type): 优化 isNull,isUndefined,isNil

vfiee · Apr 2, 2022 · a58d3db · a58d3db
1 parent c094e1f
commit a58d3db
Showing 1 changed file with 23 additions and 19 deletions.
diff --git a/packages/type/src/index.ts b/packages/type/src/index.ts
@@ -1,7 +1,7 @@
 /*
  * @Author: vyron
  * @Date: 2022-01-10 17:38:09
- * @LastEditTime: 2022-03-02 17:15:31
+ * @LastEditTime: 2022-04-01 14:44:04
  * @LastEditors: vyron
  * @Description: 判断数据类型
  * @FilePath: /v-utils/packages/type/src/index.ts
@@ -32,12 +32,11 @@ export const isSymbol = (value: unknown): value is symbol =>
   typeof value === 'symbol'
 
 // 是否为Null
-export const isNull = (value: unknown): value is null =>
-  toRawType(value) === 'Null'
+export const isNull = (value: unknown): value is null => value === null
 
 // 是否为Null
 export const isUndefined = (value: unknown): value is null =>
-  toRawType(value) === 'Undefined'
+  value === undefined
 
 // 是否为 Array
 export const isArray = Array.isArray
@@ -59,7 +58,8 @@ export const isDate = (value: unknown): value is Date =>
   toRawType(value) === 'Date'
 
 // 是否为 Arguments
-export const isArguments = (value: unknown): boolean => toRawType(value) === "Arguments"
+export const isArguments = (value: unknown): boolean =>
+  toRawType(value) === 'Arguments'
 
 // 是否为 Map
 export const isMap = (value: unknown): value is Map<any, any> =>
@@ -81,44 +81,48 @@ export const isWeakSet = (value: unknown): value is WeakSet<object> =>
 export const isNaN = (value: unknown): boolean => value !== value
 
 // 是否为null或undefined
-export const isNil = (value: unknown): boolean => {
-  const rawType = toRawType(value)
-  return rawType === 'Null' || rawType === 'Undefined'
-}
+export const isNil = (value: unknown): boolean =>
+  value === null || value === undefined
 
 // 判断是否为有效的数组长度
 const MAX_SAFE_INTEGER = 9007199254740991
-export const isLength = (value: unknown): boolean => isNumber(value) && value >= 0 && value <= MAX_SAFE_INTEGER
+export const isLength = (value: unknown): boolean =>
+  isNumber(value) && value >= 0 && value <= MAX_SAFE_INTEGER
 
 // 判断是否为类数组
-export const isArrayLike = (value: unknown): boolean => value != null && !isFunction(value) && isLength((value as Array<any>).length)
+export const isArrayLike = (value: unknown): boolean =>
+  value != null && !isFunction(value) && isLength((value as Array<any>).length)
 
 // 是否为原型
 export const isPrototype = (value: unknown): boolean => {
   const Constructor = value && (value as any).constructor
-  const proto = (typeof Constructor === 'function' && Constructor.prototype) || Object.prototype
+  const proto =
+    (typeof Constructor === 'function' && Constructor.prototype) ||
+    Object.prototype
   return value === proto
 }
 
 /**
  * 判断 value 是否为空对象,数组,map 或 set
- * @param value 
+ * @param value
  */
 export const isEmpty = (value: unknown): boolean => {
   if (value == null) return true
   const rawType = toRawType(value)
-  if (rawType === "Set" || rawType === "Map") {
-    return !(value as (Set<any> | Map<any, any>)).size
-  } else if (isArrayLike(value) && (isArray(value) || isArguments(value) || typeof value === "string")) {
-    return !(value as (string | Array<unknown>)).length
+  if (rawType === 'Set' || rawType === 'Map') {
+    return !(value as Set<any> | Map<any, any>).size
+  } else if (
+    isArrayLike(value) &&
+    (isArray(value) || isArguments(value) || typeof value === 'string')
+  ) {
+    return !(value as string | Array<unknown>).length
   } else if (isPrototype(value)) {
     return !Object.keys(value as object).length
   }
-  for (const key in (value as object)) {
+  for (const key in value as object) {
     if (!Object.prototype.hasOwnProperty.call(value, key)) {
       return false
     }
   }
   return true
 }
-