check_brackets.js

const fs = require('fs');
const path = require('path');

function walk(dir, done) {
  let results = [];
  fs.readdir(dir, function(err, list) {
    if (err) return done(err);
    let pending = list.length;
    if (!pending) return done(null, results);
    list.forEach(function(file) {
      file = path.resolve(dir, file);
      fs.stat(file, function(err, stat) {
        if (stat && stat.isDirectory()) {
          walk(file, function(err, res) {
            results = results.concat(res);
            if (!--pending) done(null, results);
          });
        } else {
          results.push(file);
          if (!--pending) done(null, results);
        }
      });
    });
  });
}

walk('./components', (err, files1) => {
  walk('./app', (err, files2) => {
    const files = [...files1, ...files2].filter(f => f.endsWith('.tsx'));
    let hasError = false;
    for (const file of files) {
      const content = fs.readFileSync(file, 'utf8');
      const lines = content.split('\n');
      lines.forEach((line, i) => {
        const tokens = line.split(/[\s'"`]+/);
        for (const token of tokens) {
          if (token.includes('-[') || token.startsWith('[')) {
            let openCount = 0;
            let closedCount = 0;
            for (const char of token) {
              if (char === '[') openCount++;
              if (char === ']') closedCount++;
            }
            if (openCount !== closedCount) {
              if (!token.includes('{') || !token.includes('}')) { // skip string interpolation inside bracket
                console.error(`Unbalanced bracket in ${file}:${i+1} -> ${token}`);
                hasError = true;
              }
            }
          }
        }
      });
    }
    if (!hasError) console.log("All [ ] matched successfully in tokens.");
  })
})