Function constructFrom

use the constructor of a class's instance to construct a new instance.
this is useful for avoiding pollution of code with new keyword along with some wonky placement of braces to make your code work.

Example

class K { constructor(value1, value2) { this.value = value1 + value2 } }
const a = new K(1, 1)
const b = constructFrom(a, 2, 2) // equivalent to `const b = new K(2, 2)`
const c = new (Object.getPrototypeOf(a).constructor)(3, 3) // vanilla way of constructing `const c = new K(3, 3)` using `a`

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