quick-lint-js

Find bugs in JavaScript programs.

E0122: missing catch or finally clause for try statement

A try statement has a list of statements followed by an optional catch block followed by an optional finally block. It is a syntax error to omit both the catch block and the finally block:

async function readConfig(configFilePath) {
  try {
    let data = await fs.promises.readFile(
      configFilePath,
      "utf-8",
    );
    return parseConfig(data);
  }
}

let recursionDepth = 0;
function recursionExample() {
  if (recursionDepth > 100) {
    throw new Error("too much recursion!");
  }
  recursionDepth += 1;
  try {
    recursionExample();
  }
}

To fix this error, remove the try keyword:

async function readConfig(configFilePath) {
  let data = await fs.promises.readFile(
    configFilePath,
    "utf-8",
  );
  return parseConfig(data);
}

Alternatively, add a catch block after the try block:

async function readConfig(configFilePath) {
  try {
    let data = await fs.promises.readFile(
      configFilePath,
      "utf-8",
    );
    return parseConfig(data);
  } catch (error) {
    if (error.code === 'ENOENT') {
      return {};
    } else {
      throw error;
    }
  }
}

Alternatively, add a finally block after the try block:

let recursionDepth = 0;
function recursionExample() {
  if (recursionDepth > 100) {
    throw new Error("too much recursion!");
  }
  recursionDepth += 1;
  try {
    recursionExample();
  } finally {
    recursionDepth -= 1;
  }
}

Documentation for other errors