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    resq

    1.10.0¬†‚Äʬ†Public¬†‚Äʬ†Published

    resq (React Element Selector Query) npm Build Status codecov

    Requirements

    • React v16 or higher
    • Node 8 or higher
    • React DevTools (optional)

    This library tries to implement something similar to querySelector and querySelectorAll, but through the React VirtualDOM. You can query for React composite elements or HTML elements. It provides two functions resq$ and resq$$ for selecting one or multiple components, respectively.

    Installation

    $ npm install --save resq
    
    $ yarn add resq
    

    Usage

    To get the most out of the library, we recommend you use React Dev Tools to verify the component names you want to select. Granted for basic usage you don't need this as long as you know the component name beforehand, but for Styled components and MaterialUI components it will be of great help.

    Type definition

     
    interface RESQNode {
        name: 'MyComponent',
        node: HTMLElement | null,
        isFragment: boolean,
        state: string | boolean | any[] | {},
        props: {},
        children: RESQNode[]
    }
     
    resq$(selector: string, element?: HTMLElement): RESQNode
    resq$$(selector: string, element?: HTMLElement): Array<RESQNode>
     

    Basic Usage

    Take this React App:

    // imports
     
    const MyComponent = () => (
        <div>My Component</div>
    )
     
    const App = () => (
        <div><MyComponent /></div>
    )
     
    ReactDOM.render(<App />, document.getElementById('root'))

    Selecting MyComponent:

    import { resq$ } from 'resq'
     
    const root = document.getElementById('root');
    resq$('MyComponent', root);
    /*
    {
        name: 'MyComponent',
        node: <div />,
        isFragment: false,
        state: {},
        props: {},
        children: []
    }
    */

    Wildcard selection

    You can select your components by partial name use a wildcard selectors:

    // imports
     
    const MyComponent = () => (
        <div>My Component</div>
    )
     
    const MyAnotherComponent = () => (
        <div>My Another Component</div>
    )
     
    const App = () => (
        <div>
            <MyComponent />
            <MyAnotherComponent />
        </div>
    )
     
    ReactDOM.render(<App />, document.getElementById('root'))

    Selecting both components by wildcard:

    import { resq$$ } from 'resq'
     
    const root = document.getElementById('root');
    resq$$('My*', root);
    /*
    [
        {
            name: 'MyComponent',
            node: <div />,
            isFragment: false,
            state: {},
            props: {},
            children: []
        },
        {
            name: 'MyAnotherComponent',
            node: <div />,
            isFragment: false,
            state: {},
            props: {},
            children: []
        },
    ]
    */

    Selecting MyAnotherComponent by wildcard:

    import { resq$ } from 'resq'
     
    const root = document.getElementById('root');
    resq$('My*Component', root);
    /*
    {
        name: 'MyAnotherComponent',
        node: <div />,
        isFragment: false,
        state: {},
        props: {},
        children: []
    }
    */

    Async selection

    Going by the same example as in basic usage, if you don't want to pass the root element to the function, you can do it this way:

    import { resq$, waitToLoadReact } from 'resq'
     
    async function getReactElement(name) {
        try {
            await waitToLoadReact(2000) // time in MS to wait before erroring
     
            return resq$(name)
        } catch (error) {
            console.warn('resq error', error)
        }
    }
     
    getReactElement('MyComponent')

    Filtering selection

    You can filter your selections byState or byProps. These are methods attached to the RESQNode return objects.

    Example app:

    // imports
     
    const MyComponent = ({ someBooleanProp }) => (
        <div>My Component {someBooleanProp ? 'show this' : ''} </div>
    )
     
    const App = () => (
        <div>
            <MyComponent />
            <MyComponent someBooleanProp={true} />
        </div>
    )
     
    ReactDOM.render(<App />, document.getElementById('root'))

    To select the first instance of MyComponent where someBooleanProp is true:

    import { resq$ } from 'resq'
     
    const root = document.getElementById('root')
    const myComponent = resq$('MyComponent', root)
    const filtered = myComponent.byProps({ someBooleanProp: true })
     
    console.log(filtered)
    /*
    {
        name: 'MyComponent',
        node: <div />,
        isFragment: false,
        state: {},
        props: {
            someBooleanProp: true,
        },
        children: []
    }
    */
     

    Deep Matching with exact flag

    If you are in need of filtering byProps or byState and require the filter to match exactly every property and value in the object (or nested objects), you can pass the exact flag to the function:

    import { resq$ } from 'resq'
     
    const root = document.getElementById('root')
    const myComponent = resq$('MyComponent', root)
    const filtered = myComponent.byProps({ someBooleanProp: true }, { exact: true })

    Install

    npm i resq

    DownloadsWeekly Downloads

    488,518

    Version

    1.10.0

    License

    MIT

    Unpacked Size

    22 kB

    Total Files

    6

    Last publish

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