quick-lint-js

Find bugs in JavaScript programs.

E0114: unexpected token in variable declaration; expected variable name

Variables can be declared using a keyword such as const, let, or var. It is a syntax error write anything except a variable name or a destructuring pattern in a const, let, or var declaration:

let sawFizzBuzz,
100..toRange().forEach(i => {
  if (i % 15) {
    console.log(i);
  } else {
    console.log("FizzBuzz");
    sawFizzBuzz = true;
  }
});

let while (!done) {
  doMoreWork();
}

To fix this error, replace , with ;:

let sawFizzBuzz;
100..toRange().forEach(i => {
  if (i % 15) {
    console.log(i);
  } else {
    console.log("FizzBuzz");
    sawFizzBuzz = true;
  }
});

Alternatively, remove the extra const, let, or var keyword:

while (!done) {
  doMoreWork();
}

Documentation for other errors