js如何匹配特定字符串的大小写

Question

现在需要获取文件类型，给你相应的文件加上icon然后文件类型是文档的后缀，是这样取的然后判断，获取图片路径是这样最后一个是判断都不存在就用“未知.icon”，这么写感觉low了，求高端玩法

Answer 1

const format = (/\.(\S+)$/.exec(res) || [,''])[1].toLowerCase()

const iconMap = {

  _default: 'war_icon.png',

  doc: 'word.png',

  docx: 'word.png',

  pdf: 'pdf_icon.png',

  rar: 'rar_icon.png',

  tif: 'tif_icon.png',

  xls: 'xls_icon.png',

  xlsx: 'xls_icon.png',

  zip: 'rar_icon.png',

}

const cache = require(`../assets/inmages/FileTypeIcon/${iconMap[format] || iconMap._default}`)

Answer 2

var cache = ''

if (/^docx?$/i.test(format)) {

} else if (/^pdf$/i.test(format)) {

} else if (/^(zip|rar)$/i.test(format)) {

  

} else if (/^xlsx?$/i.test(format)) {

  

} else if (/^tif$/i.test(format)) {

  

} else {

  

}

Answer 3

var cache = require('../assets/inmages/FileTypeIcon/'+(

    ['doc','DOC','docx','DOCX'].includes(format)?"word"

    :['pdf','PDF'].includes(format)?"pdf_icon"

    :['zip','ZIP','rar'].includes(format)?"rar_icon"

    :['xls','XLS','xlsx','XLSX'].includes(format)?"xls_icon"

    :['tif','TIF'].includes(format)?"tif_icon":"war_icon"

)+'.png')

Answer 4

function docType(str){

    let cache = '';

    str = str.toLowerCase();

    switch(str){

        case 'doc':

        case 'docx:

            cache =  '../assets/images/filetypeIcon/word.png'

            break;

        case 'pdf':

            cache =  '../assets/images/filetypeIcon/pdf_icon.png'

            break;

          ....

          defalut:

          cache = '../assets/images/filetypeIcon/war_icon.png';

    };

    return cache;

}