应用正则外部的逻辑短路匹配之一举多得
用多分支来排除，向if-else那样不必写出齐全的条件。
小而广的条件有时不仅能匹配到最终目标，而且还能精益求精(一举多得):
regexp = /str|regexp|lineannotaion|blockannotation|tampstring/g
let tmp='', str = ` ${tmp+'\`'+"${}"+ `${tmp}`+ /*A*/ (tmp={'a':/(?<!x`)/g}["a"]) //B}'c' \" <d> & // e /*f*/`, // greg = /(?<!\\)\/(?![^\/\*])[\s\S]+?(?<!\\)\//g;//*/ h str; reg = /c/g, str = ``/*/ j k //KK//*/str = "\"http://'xxxx'\/\"";str = `.replace(/&/g, '&').replace(/</g, '<').replace(/\u00a0/g, ' ')${`l`+str}`str = '\ \' //n"`\' /* // */匹配任意字符
/[\s\S]/g/[^]/g匹配单行正文
/\/\/.*/g匹配多行正文
/\/\*[^]*?\*\//g匹配字符串
/('|"|`)[^]*?(?<!\\)\1/g/''|``|""|('|"|`)[^]*?[^\\]\1/g/''|""|('|")[^]*?[^\\]\1|`(?:\\[\s\S]|\${(?:[^{}]|{(?:[^{}]|{[^}]*})*})+}|(?!\${)[^\\`])*`/g字符串模板${}外部可能还会呈现字符串模板和正则表达式内存在未本义的\`
书写简略的字符串模板时应用第二个正则表达式应该是没大问题的
匹配正则表达式
/\/.*?[^\\]\//g替换须要本义的字符
.replace(/&|<|\u00a0/g,m=> m =='&' ? "&" : m=='<' ? "<" : /\u00a0/.test(m) ? ' ' : m)根本实现
CODE_JAVASCRIPT.replace(/&|<|\u00a0/g,m=> // 匹配须要本义的HTML符号 m =='&' ? "&" : m=='<' ? "<" : /\u00a0/.test(m) ? ' ' : m).replace( // /\/\/.*|\/\*[^]*?\*\/|''|``|""|('|"|`)[^]*?[^\\]\1|\/.*?[^\\]\//g, // ${}外部不能再嵌套模板字符串，外部应用正则时要本义`，像这样 ${"helo".match(/\`/)[0]} /\/\/.*|\/\*[^]*?\*\/|\/.*?[^\\]\/|''|""|('|")[^]*?[^\\]\1|`(?:\\[\s\S]|\${(?:[^{}]|{(?:[^{}]|{[^}]*})*})+}|(?!\${)[^\\`])*`/g, (m,a,b,c,d,e,f,g)=>{ // return /\/\*|\/\//.test(m.slice(0, 2)) return m.slice(0,2) == "//" || m.slice(0,2) == "/*" // ? (!b || /\r|\n/.test(c[b-1]) ? "<span class=\"annotation\">"+m+"</span>" : "<span class=\"annotation-sub\">"+m+"</span>") ? "<span class=\"annotation\">"+m+"</span>" : m})测试版
<link rel="icon" href="data:base64"> <title>CL Testy</title> <script src="https://cdn.jsdelivr.net/npm/marked/marked.min.js"></script><body><textarea style="white-space:pre;width:100%;height:400px"></textarea><pre style="padding:0.5em;background:rgba(0,0,0,0.05);overflow:scroll;scrollbar-width:none"></pre><article></article><script>"use strict"; let PXHR=(e,t=!0)=>{return new Promise((n,s)=>{let a=new XMLHttpRequest;a.onreadystatechange=(()=>{4==a.readyState&&(200==a.status||304==a.status?n(a):s(a))}),a.open("GET",e,t),a.send()})}, $ = s => document.querySelector(s), _ = s => s.replace(/\/\/.*|\/\*[^]*?\*\/|\/.*?[^\\]\/|''|""|('|")[^]*?[^\\]\1|`(?:\\[\s\S]|\${(?:[^{}]|{(?:[^{}]|{[^}]*})*})+}|(?!\${)[^\\`])*`/g, (m,a,b,c)=>{ return /\/\*|\/\//.test(m.slice(0, 2)) ? ( !b || /\r|\n/.test(c[b-1]) ? "<span class=\"annotation\">"+m+"</span>" : "<span class=\"annotation-sub\">"+m+"</span>" ) :a={ '\'':"<span class=char>"+m+"</span>", '\"':"<span class=string>"+m+"</span>", '/' :"<span class='regexp'>"+m+"</span>", '\`':"<span class='blockstr'>"+m+"</span>" }[m[0]] || m }), __= s => s.replace(/&|<|\u00a0/g,m=> m=='&' ? "&" : m=='<' ? "<" : /\u00a0/.test(m) ? ' ' : m); PXHR(location.origin+"/testy.js").then( res =>{ document.querySelector("pre").innerHTML = $("textarea").value = _(__(res.responseText)) }) PXHR(location.origin+"/testy.md").then( res =>{ document.querySelector("article").innerHTML = marked(res.responseText); document.querySelector(".language-js").innerHTML = _(__(document.querySelector(".language-js").textContent)) })</script></body></html><style> .annotation{background:#62a562} .annotation-sub{background:#ccc} .char{background:skyblue} .string{background:rgb(172, 134, 172)} .blockstr{background:orange} .regexp{background:pink}</style>测试的js和md文件
let tmp='', str = ` ${tmp+'\`'+"${}"+ `${tmp}`+ /*A*/ (tmp={'a':/(?<!x`)/g}["a"]) //B}'c' \" <d> & // e /*f*/`, // greg = /(?<!\\)\/(?![^\/\*])[\s\S]+?(?<!\\)\//g;//*/ h str; reg = /c/g, str = ``/*/ j k //KK//*/str = "\"https://'crawly.top'\/\"";str = `.replace(/&/g, '&').replace(/</g, '<').replace(/\u00a0/g, ' ')${`l`+str}`str = '\ \' //n"`\' /* // */