max-attributes-per-line.md

enforce the maximum number of attributes per line (vue/max-attributes-per-line)

• ⚙️ This rule is included in "plugin:vue/strongly-recommended" and "plugin:vue/recommended".

Limits the maximum number of attributes/properties per line to improve readability.

📖 Rule Details

This rule aims to enforce a number of attributes per line in templates. It checks all the elements in a template and verifies that the number of attributes per line does not exceed the defined maximum. An attribute is considered to be in a new line when there is a line break between two attributes.

There is a configurable number of attributes that are acceptable in one-line case (default 1), as well as how many attributes are acceptable per line in multi-line case (default 1).

👎 Examples of incorrect code for this rule:

<MyComponent lorem="1" ipsum="2"/>

<MyComponent
  lorem="1" ipsum="2"
/>

<MyComponent
  lorem="1" ipsum="2"
  dolor="3"
/>

👍 Examples of correct code for this rule:

<MyComponent lorem="1"/>

<MyComponent
  lorem="1"
  ipsum="2"
/>

<MyComponent
  lorem="1"
  ipsum="2"
  dolor="3"
/>

🔧 Options

{
  "vue/max-attributes-per-line": [2, {
    "singleline": 1,
    "multiline": {
      "max": 1,
      "allowFirstLine": false
    }
  }]
}

allowFirstLine

For multi-line declarations, defines if allows attributes to be put in the first line. (Default false)

👎 Example of incorrect code for this setting:

<!-- [{ "multiline": { "allowFirstLine": false }}] -->
<MyComponent foo="John"
  bar="Smith"
/>

👍 Example of correct code for this setting:

<!-- [{ "multiline": { "allowFirstLine": false }}] -->
<MyComponent
  foo="John"
  bar="Smith"
/>

singleline

Number of maximum attributes per line when the opening tag is in a single line. (Default is 1)

👎 Example of incorrect code for this setting:

<!-- [{"singleline": 1}] -->
<MyComponent foo="John" bar="Smith"/>

👍 Example of correct code for this setting:

<!-- [{"singleline": 1}] -->
<MyComponent foo="John"/>

multiline

Number of maximum attributes per line when a tag is in multiple lines. (Default is 1)

👎 Example of incorrect code for this setting:

<!-- [{"multiline": 1}] -->
<MyComponent
  foo="John" bar="Smith"
/>

👍 Example of correct code for this setting:

<!-- [{"multiline": 1}] -->
<MyComponent
  foo="John"
  bar="Smith"
/>

When Not To Use It

If you do not want to check the number of attributes declared per line you can disable this rule.