feat(utils): 新增 toHalfWidthString

src/utils/index.ts

@@ -82,6 +82,7 @@ export * from './sampleIndex'
 export * from './selectDom'
 export * from './signal'
 export * from './swap'
+export * from './toHalfWidthString'
 export * from './traverse'
 export * from './TreeData'
 export * from './wait'

src/utils/toHalfWidthString.test.ts

@@ -0,0 +1,13 @@
+import { toHalfWidthString } from './toHalfWidthString'
+
+describe('toHalfWidthString', () => {
+  test('ok', () => {
+    expect(toHalfWidthString('　')).toBe(' ')
+    expect(toHalfWidthString('１２３４５６７８９０')).toBe('1234567890')
+    expect(
+      toHalfWidthString('ａｂｃｄｅｆｇｈｉｊｋｌｍｎｏｐｑｒｓｔｕｖｗｘｙｚ'),
+    ).toBe('abcdefghijklmnopqrstuvwxyz')
+    expect(toHalfWidthString('，＠！＃＆（）％｛｝')).toBe(',@!#&()%{}')
+    expect(toHalfWidthString('【】“”。￥×')).not.toBe('[]"".$*')
+  })
+})

src/utils/toHalfWidthString.ts

@@ -0,0 +1,20 @@
+/**
+ * 转换为半角字符串。
+ *
+ * @param value 要转换的字符串
+ * @returns 返回转换后的半角字符串
+ */
+export function toHalfWidthString(value: string): string {
+  let result = ''
+  for (let i = 0; i < value.length; i++) {
+    const charCode = value.charCodeAt(i)
+    if (charCode === 12288) {
+      result += String.fromCharCode(charCode - 12256)
+    } else if (charCode > 65280 && charCode < 65375) {
+      result += String.fromCharCode(charCode - 65248)
+    } else {
+      result += String.fromCharCode(charCode)
+    }
+  }
+  return result
+}