如何使用js正则表达式验证文件夹名是否符合规范

// 关键字
const KEYWORDS = ["script","style","imgs","docs","break","else","new","var","case","finally","return","void","catch","for","switch","while","continue","function","this","with","default","if","throw","delete","in","try","do","instranceof","typeof","abstract","enum","int","short","boolean","export","interface","static","byte","extends","long","super","char","final","native","synchronized","class","float","package","throws","const","goto","private ","transient","debugger","implements","protected ","volatile","double","import","public"]
 
// 正则：限定以小写字母开头，并且中间只包括小写字母和-，以小写字母结尾
let reg = /^[a-z]{1}[a-z-]*?[a-z]$/;
// /^[a-z]{1}[a-z-0-9]*?[a-z0-9]$/  (这个是限定以小写字母开头，中间小写or数字，结尾数字。两位数的情况下中间可以省略)
 
// 要判断的文件名
let fileName = `xxxxx`
 
if(KEYWORDS.indexOf(fileName) > -1){
// 文件名是关键字
}else if( reg.test(fileName) ){ // 判断：限定以小写字母开头，并且中间只包括小写字母和-，以小写字母结尾
// 符合要求
}else{
// 不符合要求
}

// 正则：限定以大写字母开头，并且中间只包括大写or小写字母，以小写字母结尾
let reg = /^[A-Z]{1}[a-zA-Z]*?[a-z]$/;
 
// 关键字
const KEYWORDS = ["script","style","imgs","docs","break","else","new","var","case","finally","return","void","catch","for","switch","while","continue","function","this","with","default","if","throw","delete","in","try","do","instranceof","typeof","abstract","enum","int","short","boolean","export","interface","static","byte","extends","long","super","char","final","native","synchronized","class","float","package","throws","const","goto","private ","transient","debugger","implements","protected ","volatile","double","import","public"]
 
// 大写首字母字母的关键字
let up_keywords = KEYWORDS.map(item=>{
    return item.charAt(0).toUpperCase() + item.slice(1); 
})
 
// 要判断的文件名
let fileName = `xxxxx`
 
if(up_keywords.indexOf(fileName) > -1){
    // 文件名是关键字
}else if( reg.test(fileName) ){ // 判断：限定以小写字母开头，并且中间只包括小写字母和-，以小写字母结尾
    // 符合要求
}else{
    // 不符合要求
}

// 正则：限定以大写字母开头，并且中间只包括大写or小写字母，以小写字母结尾
let reg = /^[a-z]{1}[a-zA-Z]*?[a-z]$/;
// 关键字
const KEYWORDS = ["script","style","imgs","docs","break","else","new","var","case","finally","return","void","catch","for","switch","while","continue","function","this","with","default","if","throw","delete","in","try","do","instranceof","typeof","abstract","enum","int","short","boolean","export","interface","static","byte","extends","long","super","char","final","native","synchronized","class","float","package","throws","const","goto","private ","transient","debugger","implements","protected ","volatile","double","import","public"]
// 要判断的文件名
let fileName = `xxxxx`
if(KEYWORDS .indexOf(fileName) > -1){
// 文件名是关键字
}else if( reg.test(fileName) ){ // 判断：限定以小写字母开头，并且中间只包括小写字母和-，以小写字母结尾
// 符合要求
}else{
// 不符合要求
}

//获取文件名，不带后缀
var file_name=file_path.replace(/(.*\/)*([^.]+).*/ig,"$2");

//获取文件后缀
1.var FileExt=file_path.replace(/.+\./,"");

2.var fileExtension = file_path.substring(file_path.lastIndexOf('.') + 1);

//截取文件后缀
var reg = /\.\w+$/;
var file_name = file_path.replace(reg,'');