在try catch运行之前解决异步问题

const fs = require('fs');

fs.readFile('file.txt', 'utf8', (err, data) => {
  if (err) {
    console.error('Error reading file:', err);
  } else {
    console.log('File content:', data);
  }
});

fetch('https://api.example.com/data')
  .then(response => response.json())
  .then(data => console.log('Data:', data))
  .catch(error => console.error('Error:', error));

const fs = require('fs').promises;

async function readFile() {
  try {
    const data = await fs.readFile('file.txt', 'utf8');
    console.log('File content:', data);
  } catch (err) {
    console.error('Error reading file:', err);
  }
}

readFile();