noUndeclaredVariables (since v0.10.0)

Prevents the usage of variables that haven’t been declared inside the document

Examples

Invalid

foobar;

correctness/noUndeclaredVariables.js:1:1 lint/correctness/noUndeclaredVariables ━━━━━━━━━━━━━━━━━━━━

  ⚠ The foobar variable is undeclared
  
  > 1 │ foobar;
      │ ^^^^^^
    2 │