unicorn/new-for-builtins Pedantic ​
What it does ​
Enforces the use of new for following builtins: Object, Array, ArrayBuffer, BigInt64Array, BigUint64Array, DataView, Date, Error, Float32Array, Float64Array, Function, Int8Array, Int16Array, Int32Array, Map, WeakMap, Set, WeakSet, Promise, RegExp, Uint8Array, Uint16Array, Uint32Array, Uint8ClampedArray, SharedArrayBuffer, Proxy, WeakRef, FinalizationRegistry.
Disallows the use of new for following builtins: String, Number, Boolean, Symbol, BigInt.
These should not use new as that would create object wrappers for the primitive values, which is not what you want. However, without new they can be useful for coercing a value to that type.
Why is this bad? ​
They work the same, but new should be preferred for consistency with other constructors.
Examples ​
Examples of incorrect code for this rule:
javascript
const foo = new String("hello world");
const bar = Array(1, 2, 3);Examples of correct code for this rule:
javascript
const foo = String("hello world");
const bar = new Array(1, 2, 3);