eslint/docs/src/rules/no-new.md

   1 ---
   2 title: no-new
   3 rule_type: suggestion
   4 ---
   5
   6
   7 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:
   8
   9 ```js
  10 var person = new Person();
  11 ```
  12
  13 It's less common to use `new` and not store the result, such as:
  14
  15 ```js
  16 new Person();
  17 ```
  18
  19 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.
  20
  21 ## Rule Details
  22
  23 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.
  24
  25 Examples of **incorrect** code for this rule:
  26
  27 ::: incorrect
  28
  29 ```js
  30 /*eslint no-new: "error"*/
  31
  32 new Thing();
  33 ```
  34
  35 :::
  36
  37 Examples of **correct** code for this rule:
  38
  39 ::: correct
  40
  41 ```js
  42 /*eslint no-new: "error"*/
  43
  44 var thing = new Thing();
  45
  46 Foo();
  47 ```
  48
  49 :::