riot-opt-types-mixin

A direct port of React's PropTypes for usage in Riot tags.

This mixin will monitor the opts being passed to your tags. If your tag is passed opts it doesn't expect, this mixin will warn you via a console error.

Installation

npm install riot-opt-types-mixin --save-dev

Usage

Define this.optTypes = {} in your riotjs tag, then include riot-opt-types-mixin as a mixin like so:

Simple Example

index.js:

import riotOptTypesMixin from 'riot-opt-types-mixin';
riot.mixin(riotOptTypesMixin);  // apply mixin to all tags

app.tag:

import { optTypes } from 'riot-opt-types-mixin';
<app>
    <script>
        // define expected opts (attributes) for your tag
        this.optTypes = {
            name: optTypes.string.isRequired
        };
    </script>
    
    <h1>Hello, {opts.name}</h1>
</app>

Now, if you pass name incorrectly to <my-tag> you get a nice descriptive error in your browser's console

<my-tag name={100}/> = Invalid opt 'name' of type 'number' supplied to 'my-tag', expected 'string'.

Advanced Example

You can also nest opt validation which can be useful when combined state management tools such as Redux

this.optTypes = {
    state: optTypes.shape({
        data: optTypes.shape({
            name: optTypes.string.isRequired
        })
    }),
    dispatch: optTypes.func.isRequired
};

Please refer to React's PropTypes Documentation for more info on how to use these optTypes.

Supported optTypes

• optTypes.any
• optTypes.arrayOf
• optTypes.array
• optTypes.bool
• optTypes.func
• optTypes.instanceOf
• optTypes.number
• optTypes.objectOf
• optTypes.object
• optTypes.oneOf
• optTypes.oneOfType
• optTypes.shape
• optTypes.string

Please refer to React's PropTypes Documentation if you have any questions about how each of these function.

This mixin feature all the same optTypes listed in React's documentation except for element and node which validates React components. I plan on appending a "tag" checker soon for Riot.

Why?

I'm a big fan of this functionality in React and wanted to be able to utilize it in Riot apps.

This mixin isn't really benefitial to small projects, but it can help while developing larger applications because it forces your tags to strictly define what inputs they expect from their parent tags, or application state (redux, flux, etc).

Size

This mixin, when compressed, clocks in at about 5kb BUT, really it is only benefitial for local development, so you can (and probably should) trim it out for deployment builds.

If using webpack, strip-loader and NormalModuleReplacementPlugin are good places to start. (TODO: add more documentation about how to do this...)

Alternatives

Using Riot in conjunction with TypeScript allows for setting of expected prop types. RiotTS looks like a good option if you're interested in using TypeScript for your Riot app.

Contributing

PRs welcome! Please contact me if you have any questions, suggestions, or issues too!

Thanks

Most of the functionality is a direct port of React's PropTypes.