## E0135: expected variable name for 'catch'

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 write a string literal instead of a variable name between a `catch` clause's parentheses:

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

To fix this error, replace the string literal with a variable name:

    async function downloadURLWithRetries(url) {
      for (;;) {
        try {
          return await downloadURL(url);
        } catch (e) {
          if (e.code === 'ETIMEOUT') {
            // Loop and try again.
          } else {
            throw e;
          }
        }
      }
    }

Documentation for other errors