als-remove-js-comments/remove-comments.js

A utility for removing JavaScript comments, supporting both single-line and multi-line comments with proper handling of string literals.

function removeComments(text) {
   const quotes = { '"': true, "'": true, '`': true };
   let newText = '', quote = null;
   for (let i = 0; i < text.length; i++) {
      const char = text[i];
      if (quotes[char] && text[i - 1] !== '\\') {
         quote = quote === char && text[i - 1] !== '\\' ? null : char;
         newText += text[i];
      } else if (!quote && char === '/' && text[i + 1] === '/') {
         while(i < text.length && text[i] !== '\n') i++;
         if(text[i] === '\n') newText += text[i]
      } else if (!quote && char === '{' && text[i + 1] === '/' && text[i + 2] === '*') {
         while (i < text.length && !(text[i] === '*' && text[i + 1] === '/' && text[i + 2] === '}')) i++;
         i = i+2
      } else if (!quote && char ==='/' && text[i + 1] === '*') {
         while(i < text.length && !(text[i] === '*' && text[i + 1] === '/')) i++; 
         i++
      } else newText += text[i]
   }

   return newText
}

try { module.exports = removeComments } catch (error) { }