How can we extract information from the brackets using a Regular Expression?

I am facing a situation where I have a string similar to [url.com](url). My objective is to extract the data from those brackets and convert it into a link format like

<a href="url.com">url</a>
. Can anyone offer assistance on how to solve this issue?

Answer №1

You can utilize the match function with the regex pattern /(?<=(\[|\())([^\])]+)/g

var matches = "[url.com](url)".match(/(?<=(\[|\())([^\])]+)/g) ; //["url.com", "url"]

Next, apply matches to create an anchor tag like so:

var aHTML = "";
if (matches && matches.length == 2)
{
   aHTML = '<a href="' + matches[0] + '">' + matches[0] + '</a>'
}

Update

If you have a string formatted in this way and need to replace it inline, use the following:

var getLink = (str) => {
  var matches = str.match(/(?<=(\[|\())([^\])]+)/g);

  var aHTML = "";
  if (matches && matches.length == 2) {
    aHTML = '<a href="' + matches[0] + '">' + matches[0] + '</a>'
  }
  return aHTML;
};

var replaceInline = (str) => {
   return str.replace( /\[[^\]]+\]\([^)]+\)/g, r => getLink(r) );
};

Example

var getLink = (str) => {
  var matches = str.match(/(?<=(\[|\())([^\])]+)/g);

  var aHTML = "";
  if (matches && matches.length == 2) {
    aHTML = '<a href="' + matches[0] + '">' + matches[0] + '</a>'
  }
  return aHTML;
};

var replaceInline = (str) => {
   return str.replace( /\[[^\]]+\]\([^)]+\)/g, r => getLink(r) );
};

var sample = "Here is a link [url.com](url) inline";
console.log( replaceInline(sample) );

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