useSpread

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JavaScript (and super languages)

Summary

Diagnostic Category: lint/nursery/useSpread
This rule has an unsafe fix.
The default severity of this rule is information.
Sources:
- Same as prefer-spread

How to configure

1
{
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  "linter": {
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    "rules": {
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      "nursery": {
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        "useSpread": "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/nursery/useSpread  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ℹ apply() is used to call a function with arguments provided as an array.
  
  > 1 │ foo.apply(null, args);
      │ ^^^^^^^^^^^^^^^^^^^^^
    2 │ 
  
  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/nursery/useSpread  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ℹ apply() is used to call a function with arguments provided as an array.
  
  > 1 │ foo.apply(null, [1, 2, 3]);
      │ ^^^^^^^^^^^^^^^^^^^^^^^^^^
    2 │ 
  
  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/nursery/useSpread  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ℹ apply() is used to call a function with arguments provided as an array.
  
  > 1 │ foo.apply(undefined, args);
      │ ^^^^^^^^^^^^^^^^^^^^^^^^^^
    2 │ 
  
  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/nursery/useSpread  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ℹ apply() is used to call a function with arguments provided as an array.
  
  > 1 │ obj.foo.apply(obj, args);
      │ ^^^^^^^^^^^^^^^^^^^^^^^^
    2 │ 
  
  ℹ Unsafe fix: Use the spread operator.
  
    1   │ - obj.foo.apply(obj,·args);
      1 │ + obj.foo(...args);
    2 2 │

Valid

1
foo(...args);
2

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

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