let codeBlock = false let blockBuf = "" function parseLine(str){ if(str.search(/^```/)!=-1){ if(!codeBlock){ let clss = str.replace("```","") codeBuf="

"
            codeBlock = !codeBlock
            return ""
        }else{
            codeBuf+="

" codeBlock = !codeBlock return codeBuf } } if(!codeBlock){ const regH1 = new RegExp("^\\s*#[^#]+") const regH2 = new RegExp("^\\s*##[^#]+") const regH3 = new RegExp("^\\s*###[^#]+") let index; if ((index=str.search(regH1))!=-1){ str=str.replace(new RegExp("#"),"

") str=str+"

" return str }else if ((index=str.search(regH2))!=-1){ str=str.replace(new RegExp("##"),"

") str=str+"

" return str }else if ((index=str.search(regH3))!=-1){ str=str.replace(new RegExp("###"),"

") str=str+"

" return str } //check for images const regImg = new RegExp("!\\[[^\$\$]*\\]\$[^\\[\\]]+\$") if ((index=str.search(regImg))!=-1){ const url = str.match(new RegExp("(?<=!\\[.*\\]\$)[^\\[\\]]+(?=\$)")) const alt = str.match(new RegExp("(?<=!\\[)[^\$\$]*(?=\\]\$.+\$)")) str = str.replace(regImg, ` ${alt}

`) } //check for links const regA = new RegExp("\\[.*\\]\$.+\$") if ((index=str.search(regA))!=-1){ const url = str.match(new RegExp("(?<=\$).+(?=\$)")) const text = str.match(new RegExp("(?<=\\[).*(?=\\])")) str = str.replace(regA, `${text}`) } //check if paragraph const regP = new RegExp("^\\s*[^#-]") if ((index=str.search(regP))!=-1){ str = "

"+str+"

" } //check for list item const regLi = new RegExp("^\\s*-.+") if ((index=str.search(regLi))!=-1){ str = str.replace(new RegExp("^\\s*-"), "

") str = str+"

" } if(str.search(new RegExp("^\\s*$"))!=-1){ str="
" } }else{ codeBuf += str+"
" str="" } return str } onload=()=>{ convert() } function convert(){ let text = document.querySelector("#md").value.split("\n") text=text.map((line)=>{return parseLine(line)}) document.querySelector("#marked").innerHTML=` ${text.join("")}` }

Markdown_Parser.js - RegExp