quick-lint-js

Find bugs in JavaScript programs.

E0130: missing catch variable name between parentheses

A try statement can have a catch clause. The catch clause can define a variable for the caught exception. It is a syntax error to omit the variable name between a catch clause's parentheses:

async function downloadURLWithRetries(url) {
  for (;;) {
    try {
      return await downloadURL(url);
    } catch () {
      // Loop and try again.
    }
  }
}

To fix this error, remove the parentheses:

async function downloadURLWithRetries(url) {
  for (;;) {
    try {
      return await downloadURL(url);
    } catch {
      // Loop and try again.
    }
  }
}

Alternatively, write a variable name between the parentheses:

async function downloadURLWithRetries(url) {
  for (;;) {
    try {
      return await downloadURL(url);
    } catch (e) {
      console.log(`retrying: ${e}`);
    }
  }
}

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