Some simple markdown to BBCode, in TextBuddy

Markdown to BBCode.js

function pre(text){
  
  // Headings
  const h1m = /^#\s(.*\b)\s?(#)?$/gm;
  const h1b = `[h1]$1[/h1]`;
  text = text.replace(h1m,h1b);
  
  const h2m = /^#{2}\s(.*\b)\s?(#{2})?$/gm;
  const h2b = `[h2]$1[/h2]`;
  text = text.replace(h2m,h2b);
  
  const h3m = /^#{3}\s(.*\b)\s?(#{3})?$/gm;
  const h3b = `[h3]$1[/h3]`;
  text = text.replace(h3m,h3b);
  
  // bold, italic, strikethrough
  
  //Do Bold first because I'm lazy.
  const boldStar  = /\*\*(.*?)\*\*/gm;
  const boldUnder = /_{2}(.*?)_{2}/gm;
  const boldReplace = `[b]$1[/b]`;
  text = text.replace(boldStar,boldReplace);
  text = text.replace(boldUnder,boldReplace);
  
  //do italics second because then bolds are all out of the game.
  const italicStar  = /\*{1}(.*?)\b\*{1}/gm;
  const italicUnder = /_(.*?)_/gm;
  const italicReplace = `[i]$1[/i]`;
  text = text.replace(italicStar,italicReplace);
  text = text.replace(italicUnder,italicReplace);
  
  const strike = /~~(.*?)~~/gm;
  const strikeReplace = `[s]$1[/s]`;
  text = text.replace(strike,strikeReplace);
  
  
  //Quote
  const quote = /^>(.*$)/gm;
  text = text.replace(quote,`[quote]$1[/quote]`);
  
  //link
  const link = /\[(.*)\]\((.*)\)/gm;
  const linkRep = `[url:$2|tab]$1[/url]`;
  text = text.replace(link,linkRep);
  
  
  //TODO: ordered lists and unordered lists. But I don't want to.
  
  return text;
}

Updated the link to open links in a new tab.