feat(utils): 新增 cloneDeepFast 深克隆

src/utils/cloneDeepFast.test.ts

@@ -0,0 +1,10 @@
+import { cloneDeepFast } from './cloneDeepFast'
+
+describe('cloneDeepFast', () => {
+  test('表现正常', () => {
+    const value = { x: [1] }
+    expect(cloneDeepFast(value)).not.toBe(value)
+    expect(cloneDeepFast(value).x).not.toBe(value.x)
+    expect(cloneDeepFast(value)).toEqual(value)
+  })
+})

src/utils/cloneDeepFast.ts

@@ -0,0 +1,51 @@
+// @ts-nocheck
+// Copyright 2019 "David Mark Clements <david.mark.clements@gmail.com>"
+// MIT Licensed
+// https://github.com/davidmarkclements/rfdc
+// Modified by Jay Fong
+/**
+ * 深克隆快速版。
+ *
+ * @param value 要克隆的值
+ * @returns 返回克隆后的值
+ * @example
+ * ```typescript
+ * cloneDeepFast({ x: [1] })
+ * // => { x: [1] }
+ * ```
+ */
+export function cloneDeepFast<T>(value: T): T {
+  if (typeof value !== 'object' || value === null) return value
+  if (value instanceof Date) return new Date(value)
+  if (Array.isArray(value)) return cloneArray(value)
+  const o2 = {}
+  for (const k in value) {
+    if (Object.hasOwnProperty.call(value, k) === false) continue
+    const cur = value[k]
+    if (typeof cur !== 'object' || cur === null) {
+      o2[k] = cur
+    } else if (cur instanceof Date) {
+      o2[k] = new Date(cur)
+    } else {
+      o2[k] = cloneDeepFast(cur)
+    }
+  }
+  return o2
+}
+
+function cloneArray(a) {
+  const keys = Object.keys(a)
+  const a2 = new Array(keys.length)
+  for (let i = 0; i < keys.length; i++) {
+    const k = keys[i]
+    const cur = a[k]
+    if (typeof cur !== 'object' || cur === null) {
+      a2[k] = cur
+    } else if (cur instanceof Date) {
+      a2[k] = new Date(cur)
+    } else {
+      a2[k] = cloneDeepFast(cur)
+    }
+  }
+  return a2
+}

src/utils/index.ts

@@ -12,6 +12,7 @@ export * from 'lodash-uni'
 export * from './base64'
 export * from './bindEvent'
 export * from './chooseFile'
+export * from './cloneDeepFast'
 export * from './constantCase'
 export * from './copyTextToClipboard'
 export * from './createSubmit'