feat: add startsWith, endsWith

src/endsWith.ts

@@ -0,0 +1,10 @@
+/**
+ * 检查 `str` 是否以 `needle` 结尾。
+ *
+ * @param str 要检查的字符串
+ * @param needle 要检索的字符串
+ * @returns 是（true）或否（false）
+ */
+export default function endsWith(str: string, needle: string): boolean {
+  return str.slice(-needle.length) === needle
+}

src/index.ts

@@ -7,6 +7,7 @@ export { default as castArray } from './castArray'
 export { default as clamp } from './clamp'
 export { default as cssTransform } from './cssTransform'
 export { default as Disposer } from './Disposer'
+export { default as endsWith } from './endsWith'
 export { default as fill } from './fill'
 export { default as formatCurrency } from './formatCurrency'
 export { default as formatDate } from './formatDate'
@@ -48,6 +49,7 @@ export { default as reduce } from './reduce'
 export { default as repeat } from './repeat'
 export { default as result } from './result'
 export { default as shuffle } from './shuffle'
+export { default as startsWith } from './startsWith'
 export { default as stopEventPropagation } from './stopEventPropagation'
 export { default as storage } from './storage'
 export { default as supportPassiveEventListener } from './supportPassiveEventListener'

src/startsWith.ts

@@ -0,0 +1,10 @@
+/**
+ * 检查 `str` 是否以 `needle` 开头。
+ *
+ * @param str 要检查的字符串
+ * @param needle 要检索的字符串
+ * @returns 是（true）或否（false）
+ */
+export default function startsWith(str: string, needle: string): boolean {
+  return str.indexOf(needle) === 0
+}

test/index.test.ts

@@ -955,6 +955,8 @@ describe('isChineseIDCardNumber', () => {
   })
   test('不是', () => {
     [
+      '2000',
+      '190101881101231',
       '110101881301231',
       '110101198811214398',
       '11010119881101331a',
@@ -982,3 +984,27 @@ describe('formatDate', () => {
     )
   })
 })
+
+describe('startsWith', () => {
+  test('是', () => {
+    expect(vtils.startsWith('hello', 'he')).toBeTruthy()
+    expect(vtils.startsWith('☺===', '☺')).toBeTruthy()
+    expect(vtils.startsWith('455', '455')).toBeTruthy()
+  })
+  test('否', () => {
+    expect(vtils.startsWith('hello', 'o')).toBeFalsy()
+    expect(vtils.startsWith('☺===', '☺-')).toBeFalsy()
+  })
+})
+
+describe('endsWith', () => {
+  test('是', () => {
+    expect(vtils.endsWith('hello', 'o')).toBeTruthy()
+    expect(vtils.endsWith('☺===', '===')).toBeTruthy()
+    expect(vtils.endsWith('455', '455')).toBeTruthy()
+  })
+  test('否', () => {
+    expect(vtils.endsWith('hello', 'll')).toBeFalsy()
+    expect(vtils.endsWith('☺===', '=.=')).toBeFalsy()
+  })
+})