# react-hyperscript-helpers
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A library inspired by [hyperscript-helpers](https://github.com/ohanhi/hyperscript-helpers) and [react-hyperscript](https://github.com/mlmorg/react-hyperscript).

Allows for expressing UIs in the hyperscript-helpers style but with first class support for React.

## Why?

### Pros
* Consistent javascript syntax
* Mistyped components return errors
* No need to litter code with `null` values when a component doesn't have any props
* No need for a JSX syntax highlighter
* No need for a JSX linter
* JSX elements are just functions anyway

### Cons
* Most react documentation is written with JSX so it might be unfamiliar syntax
* A lot of library components use JSX, so unless the compiled version of the library is used
a JSX transform will be necessary

## API

For elements that have already been compiled by `hh`:

```js
tagName(selector)
tagName(props)
tagName(children)
tagName(props, children)
tagName(selector, children)
tagName(selector, props, children)
```

For custom components or tags not compiled by `hh`:

```js
import { h } from 'react-hyperscript-helpers';

h(component, selector)
h(component, props)
h(component, children)
h(component, props, children)
h(component, selector, children)
h(component, selector, props, children)
```

* `component` is an HTML element as a string or a react function/class custom element
* `selector` is a string, starting with "." or "#"
* `props` is an object of attributes (the props of the component)
* `children` is the innerHTML text (string|boolean|number), or an array of elements

## Usage

DOM components are really easy to use. Just import and go.

```javascript
import { div, h2 } from 'react-hyperscript-helpers';

export default () => div('.foo', [ h2('Hello, world') ]);
```

For custom components you can either create a factory function or use the `h` function, similar to react-hyperscript.

```javascript
//MyComponent
import { div, hh } from 'react-hyperscript-helpers';

export default hh(() => div('Nifty Component'));

//Container
import MyComponent        from './MyComponent';
import SomeOtherComponent from 'who-whats-its';
import { div, h }         from  'react-hyperscript-helpers';

export default () => div('.foo', [
  MyComponent(),
  h(SomeOtherComponent, { foo: 'bar' })
]);
```

A UMD build is also available

```html
<div id="app-root" />
<script src="https://unpkg.com/react@16.4.1/umd/react.production.min.js"></script>
<script src="https://unpkg.com/react-dom@16.4.1/umd/react-dom.production.min.js"></script>
<script src="https://unpkg.com/react-hyperscript-helpers@2.0.0/umd/react-hyperscript-helpers.min.js"></script>
<script>
  function Hello() {
    return rhh.div('hello world')
  }

  ReactDOM.render(rhh.h(Hello), document.getElementById('app-root'))
</script>
```

## isRendered

The `isRendered` property will determine whether or not a react component gets rendered.

```javascript
const Khaled = ({ display }) => (
  div({ isRendered: display }, [
    span('Another one'),
    span('Another one'),
    span('Another one'),
  ]);
);

h(Khaled, { display: false });
// -> null

h(Khaled, { display: true });
/* ->
  <div>
    <span>Another one</span>
    <span>Another one</span>
    <span>Another one</span>
  </div>
*/
```

## Alternatives

* https://github.com/uber/r-dom
* https://github.com/ohanhi/hyperscript-helpers
* https://github.com/mlmorg/react-hyperscript

## References

* https://facebook.github.io/react/docs/displaying-data.html#react-without-jsx
* https://github.com/ustun/react-without-jsx
* http://jamesknelson.com/learn-raw-react-no-jsx-flux-es6-webpack/