noInvalidNewBuiltin

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Diagnostic Category: lint/correctness/noInvalidNewBuiltin

JavaScript (and super languages)

Since: v1.3.0

Disallow new operators with global non-constructor functions.

Some global functions cannot be called using the new operator and will throw a TypeError if you attempt to do so. These functions are:

Examples

Invalid

let foo = new Symbol('foo');

code-block.js:1:11 lint/correctness/noInvalidNewBuiltin  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ⚠ Symbol cannot be called as a constructor.
  
  > 1 │ let foo = new Symbol(‘foo’);
      │           ^^^^^^^^^^^^^^^^^
    2 │ 
  
  ℹ Calling Symbol with the new operator throws a TypeError.
  
  ℹ Unsafe fix: Remove new.
  
    1 │ let·foo·=·new·Symbol(‘foo’);
      │           ----

let bar = new BigInt(9007199254740991);

code-block.js:1:11 lint/correctness/noInvalidNewBuiltin  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ⚠ BigInt cannot be called as a constructor.
  
  > 1 │ let bar = new BigInt(9007199254740991);
      │           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    2 │ 
  
  ℹ Calling BigInt with the new operator throws a TypeError.
  
  ℹ Unsafe fix: Remove new.
  
    1 │ let·bar·=·new·BigInt(9007199254740991);
      │           ----

Valid

let foo = Symbol('foo');

function baz(Symbol) {
    const qux = new Symbol("baz");
}

let bar = BigInt(9007199254740991);

function quux(BigInt) {
    const corge = new BigInt(9007199254740991);
}