quick-lint-js

Find bugs in JavaScript programs.

E0087: while loop needs parentheses around condition

while loops have a condition after the while keyword. It is a syntax error to write a condition without ( and ):

let name = '';
while name === '' {
  name = prompt('What is your name?');
}

To fix this error, write ( before the condition and ) after the condition:

let name = '';
while (name === '') {
  name = prompt('What is your name?');
}

Documentation for other errors