eslint/docs/rules/no-new.md

   1 # Disallow new For Side Effects (no-new)
   2
   3 The goal of using `new` with a constructor is typically to create an object of a particular type and store that object in a variable, such as:
   4
   5 ```js
   6 var person = new Person();
   7 ```
   8
   9 It's less common to use `new` and not store the result, such as:
  10
  11 ```js
  12 new Person();
  13 ```
  14
  15 In this case, the created object is thrown away because its reference isn't stored anywhere, and in many cases, this means that the constructor should be replaced with a function that doesn't require `new` to be used.
  16
  17 ## Rule Details
  18
  19 This rule is aimed at maintaining consistency and convention by disallowing constructor calls using the `new` keyword that do not assign the resulting object to a variable.
  20
  21 Examples of **incorrect** code for this rule:
  22
  23 ```js
  24 /*eslint no-new: "error"*/
  25
  26 new Thing();
  27 ```
  28
  29 Examples of **correct** code for this rule:
  30
  31 ```js
  32 /*eslint no-new: "error"*/
  33
  34 var thing = new Thing();
  35
  36 Thing();
  37 ```