useSpreadOverApply (JavaScript)

Language JavaScript (and super languages)

Summary

Rule available since: v2.3.6
Diagnostic Category: lint/style/useSpreadOverApply
This rule isn’t recommended, so you need to enable it.
This rule has an unsafe fix.
The default severity of this rule is information.
Sources:
- Same as prefer-spread
- Inspired from e18e/prefer-spread-syntax

How to configure

1
{
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  "linter": {
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    "rules": {
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      "style": {
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        "useSpreadOverApply": "error"
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      }
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    }
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  }
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}

Description

Enforce the use of the spread operator over .apply().

The apply() method is used to call a function with a given this value and arguments provided as an array. The spread operator ... can be used to achieve the same result, which is more concise and easier to read.

Examples

Invalid

1
foo.apply(null, args);

code-block.js:1:1 lint/style/useSpreadOverApply  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ℹ Use the spread operator instead of apply().
  
  > 1 │ foo.apply(null, args);
      │ ^^^^^^^^^^^^^^^^^^^^^
    2 │ 
  
  ℹ apply() calls a function with arguments provided as an array. The spread operator does the same and is easier to read.
  
  ℹ Unsafe fix: Use the spread operator.
  
    1   │ - foo.apply(null,·args);
      1 │ + foo(...args);
    2 2 │

1
foo.apply(null, [1, 2, 3]);

code-block.js:1:1 lint/style/useSpreadOverApply  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ℹ Use the spread operator instead of apply().
  
  > 1 │ foo.apply(null, [1, 2, 3]);
      │ ^^^^^^^^^^^^^^^^^^^^^^^^^^
    2 │ 
  
  ℹ apply() calls a function with arguments provided as an array. The spread operator does the same and is easier to read.
  
  ℹ Unsafe fix: Use the spread operator.
  
    1   │ - foo.apply(null,·[1,·2,·3]);
      1 │ + foo(...[1,·2,·3]);
    2 2 │

1
foo.apply(undefined, args);

code-block.js:1:1 lint/style/useSpreadOverApply  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ℹ Use the spread operator instead of apply().
  
  > 1 │ foo.apply(undefined, args);
      │ ^^^^^^^^^^^^^^^^^^^^^^^^^^
    2 │ 
  
  ℹ apply() calls a function with arguments provided as an array. The spread operator does the same and is easier to read.
  
  ℹ Unsafe fix: Use the spread operator.
  
    1   │ - foo.apply(undefined,·args);
      1 │ + foo(...args);
    2 2 │

1
obj.foo.apply(obj, args);

code-block.js:1:1 lint/style/useSpreadOverApply  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ℹ Use the spread operator instead of apply().
  
  > 1 │ obj.foo.apply(obj, args);
      │ ^^^^^^^^^^^^^^^^^^^^^^^^
    2 │ 
  
  ℹ apply() calls a function with arguments provided as an array. The spread operator does the same and is easier to read.
  
  ℹ Unsafe fix: Use the spread operator.
  
    1   │ - obj.foo.apply(obj,·args);
      1 │ + obj.foo(...args);
    2 2 │

Valid

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foo(...args);
2

3
obj.foo(...args);
4

5
foo.apply(obj, [1, 2, 3]);