@ima/plugin-select

The IMA plugin selects extra props from page state to your component.
It uses HOC at the background for Class component or hook for Function component.
It can be very useful for example some analytical data.

Installation

``bash
npm install @ima/plugin-select --save
`

`javascript
// /app/build.js

let vendors = {
common: [
'@ima/plugin-select'
]
};

/*
The select plugin is now available.

import select from '@ima/plugin-select';
*/
`

`javascript
// /app/config/bind.js
import { ComponentUtils, PageStateManager, Dispatcher } from '@ima/core';
import PageStateManager from 'ima/page/state/PageStateManager';
import Dispatcher from 'ima/event/Dispatcher';

export default (ns, oc, settings) => {
...
const componentUtils = oc.get(ComponentUtils);

ComponentUtils.register({
$PageStateManager: PageStateManager,
$Dispatcher: Dispatcher
});

}

/*
The select plugin use $PageStateManager for selecting extra props to your component.
*/
`

Usage

You can use select HOC or useSelect hook for Function component. Example below shows useSelect hook.

`javascript
import { useSelect } from '@ima/plugin-select';

const titleSelector = (state, context, props) => {
return {
title: state.title
};
}

// Only for example purpose. You can use more selectors.
const emptySelector = (state, context, props) => {
return {};
}

function Component(props) {
const [state] = useSelect(props, titleSelector, emptySelector);

return

{state.title}

;
}
`

You can use HOC select for Class component. Example below shows select HOC.

`javascript
// /app/component/Component.js
import select from '@ima/plugin-select';

// Your page state
//{
// title: 'My title',
// media: {
// width: 90,
// height: 60
// }
//}


class Component extends React.PureComponent {
render() {
return

{this.props.title}

;
}
}

const titleSelector = (state, context, props) => {
return {
title: state.title
};
}

// Only for example purpose. You can use more selectors.
const emptySelector = (state, context, props) => {
return {};
}

export default select(titleSelect, emptySelector)(Component);

`

API

You can use two global methods for overriding default behaviour of select plugin.

The first one is setCreatorOfStateSelector where you can redefine your own selector from module reselect like example.

The second one is setHoistStaticMethod where you can override hoist-non-react-statics module like example.

How to mock in tests

To test a component wrapped in select, mock context.$Utils.$PageStateManager.getState() and context.$Utils.$Dispatcher.listen().

Example:

`js

import { mount } from 'enzyme';
import { PageContext } from '@ima/react-page-renderer';

const context = {
$Utils: {
$PageStateManager: {
getState: jest.fn(),
},
$Dispatcher: {
listen: () => {}
},
},
};

//..

const wrapper = mount(
React.createElement(
PageContext.Provider,
{ value: context },
React.createElement(MyComponent, props)
)
);

context.$Utils.$PageStateManager.getState.mockReturnValue({foo: 'bar'})

``

IMA.js

The IMA.js is an application development stack for developing
isomorphic applications written in pure JavaScript.
You can find the IMA.js skeleton application at .