汉字所对应的拼音 省略字典（网上找或者联系作者）

   const PinYin = {
         a: '\u554a\u963f\u9515',
         ai:
     }

在字典中搜索

 function arraySearch(zh) {
     for (let name in PinYin) {
         if (PinYin[name].indexOf(zh) != -1) {
             return name
         }
     }
     return ''
 }

汉字转拼音

 function ConvertPinyin(str) {
     const reg = new RegExp(/[\u4e00-\u9fa5]/) //匹配汉字
     let ary = str.split('')
     let pinyin = ary.reduce((pre, item) => {
         if (reg.test(item)) {
             let name = arraySearch(item)
             pre += name
         } else {
             pre += item
         }
         return pre
     }, '')
     let letter = pinyin.slice(0, 1)
     return { pinyin, letter }
 }

排序

 const pySegSort = (arr, keyword) => {
     if (!String.prototype.localeCompare) return null
     let obj = {}
     arr.forEach(item => {
         if (keyword) {
             const { pinyin, letter } = ConvertPinyin(item[keyword])
             obj[letter]
                 ? obj[letter].push({ ...item, pinyin, letter })
                 : (obj[letter] = [{ ...item, pinyin, letter }])
         } else {
             const { pinyin, letter } = ConvertPinyin(item)
             obj[letter]
             ? obj[letter].push({ zh: item, pinyin, letter })
             : (obj[letter] = [{ zh: item, pinyin, letter }])
         }
     })
     let data=Object.keys(obj).sort((a,b)=>a.localeCompare(b)).map(item=>{
         let data =obj[item]
         data.sort((a,b)=>a.pinyin.localeCompare(b.pinyin))
         return {title:item,data}
     })
     return data
 }

测试

let a = ["保定","西安","澳门","台湾",'江苏',"承德","抚顺","海南",'西藏','天津',"宝鸡","上海","北京"]
pySegSort(a)

 [
     {   title: 'a', data: [{ zh: '澳门', pinyin: 'aomen', letter: 'a' }] },
     {
         title: 'b',
         data: [
             { zh: '保定', pinyin: 'baoding', letter: 'b' },
             { zh: '宝鸡', pinyin: 'baoji', letter: 'b' },
             { zh: '北京', pinyin: 'beijing', letter: 'b' },
         ],
     },
     { title: 'c', data: [{ zh: '承德', pinyin: 'chengde', letter: 'c' }] },
     { title: 'f', data: [{ zh: '抚顺', pinyin: 'fushun', letter: 'f' }] },
     { title: 'h', data: [{ zh: '海南', pinyin: 'hainan', letter: 'h' }] },
     { title: 'j', data: [{ zh: '江苏', pinyin: 'jiangsu', letter: 'j' }] },
     { title: 's', data: [{ zh: '上海', pinyin: 'shanghai', letter: 's' }] },
     {
         title: 't',
         data: [
             { zh: '台湾', pinyin: 'taiwan', letter: 't' },
             { zh: '天津', pinyin: 'tianjin', letter: 't' },
         ],
     },
     {
         title: 'x',
         data: [
             { zh: '西安', pinyin: 'xian', letter: 'x' },
             { zh: '西藏', pinyin: 'xicang', letter: 'x' },
         ],
     },
 ]