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    babel-plugin-transform-react-handled-props

    2.1.0 • Public • Published

    babel-plugin-transform-react-handled-props

    Generates handledProps from defaultProps and propTypes during the build ✨

    Build Status Gemnasium npm

    Installation

    $ yarn add --dev babel-plugin-transform-react-handled-props

    This plugin is for Babel 7. If you need to support Babel 6 use the babel6 branch.

    Story

    This plugin was originally created for Semantic UI React package. It implements useful pattern with handled props by component, using it you can let down unhandled props to child component.

    Motivation

    Let's take an example from real life. There are cases when you need to pass some of the props to the child component. The simplest way is to use the destruction of the object.

    const Foo = (props) => {
      const { className, ...rest } = props
      const classes = classNames(className, 'foo')
     
      return <div {...rest} className={classes} />
    }

    The solution is simple and straightforward, but what if the props that will need to be handled is not used in the method? We still need to specify it explicitly.

    class Foo extends React.Component {
      handleClick = (e) => this.props.onClick(e)
     
      render() {
        const { className, onClick, ...rest } = this.props
        const classes = classNames(className, 'foo')
     
        return <div {...rest} className={classes} onClick={this.handleClick} />
      }
    }

    And what if there are a lot of components? Yes, we will come to another solution, it's to rely on the React's propTypes. It's a good and logical solution.

    class Foo extends React.Component {
      static propTypes = {
        className: PropTypes.string,
        onClick: PropTypes.func,
      }
     
      handleClick = (e) => this.props.onClick(e)
     
      render() {
        const { className } = this.props
        const classes = classNames(className, 'foo')
        const rest = _.omit(this.props, _.keys(Foo.propTypes))
     
        return <div {...rest} className={classes} onClick={this.handleClick} />
      }
    }

    Looks pretty good? But, there is only one problem, we don't need propTypes in the production build. We can take the plugin to remove them, but then our solution will be broken? It's possible that you already use this approach, but you can't get rid of propTypes in the your bundle. This plugin solves the described problem, so you can rely on propTypes and at the same time remove them from the production build.

    class Foo extends React.Component {
      static propTypes = {
        className: PropTypes.string,
        onClick: PropTypes.func,
      }
     
      handleClick = (e) => this.props.onClick(e)
     
      render() {
        const { className } = this.props
        const classes = classNames(className, 'foo')
        const rest = _.omit(this.props, Foo.handledProps)
     
        return <div {...rest} className={classes} onClick={this.handleClick} />
      }
    }

    Example transform

    In

    const Baz = (props) => (
      <div {...props} />
    )
     
    Baz.propTypes = {
      children: PropTypes.node,
      className: PropTypes.string,
    }

    Out

    const Baz = (props) => (
      <div {...props} />
    )
     
    Baz.handledProps = ['className', 'children'];
     
    Baz.propTypes = {
      children: PropTypes.node,
      className: PropTypes.string,
    }

    Usage

    Via .babelrc (Recommended)

    .babelrc

    {
      "plugins": ["transform-react-handled-props"]
    }

    Via CLI

    $ babel --plugins transform-react-handled-props script.js

    Via Node API

    require("babel-core").transform("code", {
      plugins: ["transform-react-handled-props"]
    });

    Options

    ignoredProps

    This options allows to ignore some props, this will allow to not add them to handledProps.

    {
      "plugins": ["transform-react-handled-props", { "ignoredProps": ["children"] }]
    }

    In

    const Baz = (props) => (
      <div {...props} />
    )
     
    Baz.propTypes = {
      children: PropTypes.node,
      className: PropTypes.string,
    }

    Out

    const Baz = (props) => (
      <div {...props} />
    )
     
    Baz.handledProps = ['className'];
     
    Baz.propTypes = {
      children: PropTypes.node,
      className: PropTypes.string,
    }

    Is it safe?

    Absolutely 😎 You can also use in production with babel-plugin-transform-react-remove-prop-types and it will work perfectly.

    const Baz = (props) => {
      const rest = _.omit(props, Baz.handledProps)
     
      return (
        <div {...props}>
          <Foo {...rest} />
        </div>
      )
    }

    License

    MIT

    Install

    npm i babel-plugin-transform-react-handled-props

    DownloadsWeekly Downloads

    973

    Version

    2.1.0

    License

    MIT

    Unpacked Size

    61.4 kB

    Total Files

    47

    Last publish

    Collaborators

    • layershifter