jsx-props-no-spreading.md

Disallow JSX prop spreading (inferno/jsx-props-no-spreading)

Enforces that there is no spreading for any JSX attribute. This enhances readability of code by being more explicit about what props are received by the component. It is also good for maintainability by avoiding passing unintentional extra props.

Rule Details

Examples of incorrect code for this rule:

<App {...props} />
<MyCustomComponent {...props} some_other_prop={some_other_prop} />
<img {...props} />

Examples of correct code for this rule:

const {src, alt} = props;
const {one_prop, two_prop} = otherProps;
<MyCustomComponent one_prop={one_prop} two_prop={two_prop} />
<img src={src} alt={alt} />

Rule Options

...
"inferno/jsx-props-no-spreading": [<enabled>, {
    "html": "ignore" | "enforce",
    "custom": "ignore" | "enforce",
    "explicitSpread": "ignore" | "enforce",
    "exceptions": [<string>]
}]
...

html

html set to ignore will ignore all html jsx tags like div, img etc. Default is set to enforce.

Examples of correct code for this rule, when html is set to ignore:

<img {...props} />

Examples of incorrect code for this rule, when html is set to ignore:

<MyCustomComponent {...props} />

custom

custom set to ignore will ignore all custom jsx tags like App, MyCustomComponent etc. Default is set to enforce.

Examples of correct code for this rule, when custom is set to ignore:

<MyCustomComponent {...props} />

Examples of incorrect code for this rule, when custom is set to ignore:

<img {...props} />

explicitSpread

explicitSpread set to ignore will ignore spread operators that are explicitly listing all object properties within that spread. Default is set to enforce.

Examples of correct code for this rule, when explicitSpread is set to ignore:

<img {...{ prop1, prop2, prop3 }} />

exceptions

An "exception" will always flip the resulting html or custom setting for that component - ie, html set to ignore, with an exception of div will enforce on an div; custom set to enforce with an exception of Foo will ignore Foo.

{ "exceptions": ["Image", "img"] }

Examples of correct code for this rule:

const {src, alt} = props;
<Image {...props} />
<img {...props} />

Examples of incorrect code for this rule:

<MyCustomComponent {...props} />

{ "html": "ignore", "exceptions": ["MyCustomComponent", "img"] }

Examples of correct code for this rule:

const {src, alt} = props;
const {one_prop, two_prop} = otherProps;
<img src={src} alt={alt} />
<MyCustomComponent {...otherProps} />

Examples of incorrect code for this rule:

<img {...props} />

When Not To Use It

If you are not using JSX or have lots of props to be passed or the props spreading is used inside HOC.