bpk-react-utils

bpk-react-utils

Miscellaneous React based utilities for use in Backpack components.

Installation

npm install bpk-react-utils --save-dev

Portal.js

Render's children into a new component tree and appends it to document.body. Useful for Modals, Popovers, Tooltips etc where it's necessary in overcoming z-index issues when absolutely positioning elements.

Usage

import { Portal } from 'bpk-react-utils';
import BpkButton from 'bpk-component-button';
import { BpkCode } from 'bpk-component-code';
import React, { Component } from 'react';

class MyComponent extends Component {
  constructor() {
    super();

    this.state = {
      isOpen: false,
    };

  }

  onOpen = () => {
    this.setState({
      isOpen: true,
    });
  }

  onClose = () => {
    this.setState({
      isOpen: false,
    });
  }

  render() {
    return (
      <div>
        <BpkButton onClick={this.onOpen}>Open portal</BpkButton>
        <Portal
          isOpen={this.state.isOpen}
          onClose={this.onClose}
        >
          <div>I'm now appended to <BpkCode>document.body</BpkCode></div>
        </Portal>
      </div>
    );
  }
}

Props

Property	PropType	Required	Default Value
children	node	true	-
isOpen	bool	true	-
beforeClose	func	false	null
onClose	func	false	noop
onOpen	func	false	noop
onRender	func	false	noop
renderTarget	func	false	null
target	oneOf([function, node])	false	null
closeOnEscPressed	bool	false	true

cssModules.js

A helpful utility which permits backwards compatibility with hard coded classes and CSS modules.

Usage

import React from 'react';
import { cssModules } from 'bpk-react-utils';

import STYLES from './MyComponent.scss';

const getClassName = cssModules(STYLES);

const MyComponent = (props) => (
  <div className={getClassName('MyComponent')}>
    <div className={getClassName('MyComponent__inner')}>
      {props.children}
    </div>
  </div>
);

With CSS modules:

<div class="_35WloynrPDta8fhSfoHEgE">
  <div class="_1ghNYY7jOYzUneVCT4piQ9">
    Some text.
  </div>
</div>

Without CSS modules:

<div class="MyComponent">
  <div class="MyComponent__inner">
    Some text.
  </div>
</div>

The returned function accepts multiple class names and ignores values other than strings. e.g:

import { cssModules } from 'bpk-react-utils';

import STYLES from './MyComponent.scss';

const getClassNames = cssModules(STYLES);

const MyComponent = (props) => (
  <div className={getClassName('MyComponent', props.disabled && 'MyComponent--disabled')}>
   {props.children}
  </div>
);

Will result in MyComponent MyComponent--disabled if props.disabled is true or MyComponent otherwise.

TransitionInitialMount.js

A wrapper around react-transition-group which makes it easy to transition a components initial mount. All you need to provide is two class names and a timeout.

Usage

import React from 'react';
import { TransitionInitialMount } from 'bpk-react-utils';

const MyComponent = (props) => (
  <TransitionInitialMount
    appearClassName="my-transition-class--appear"
    appearActiveClassName="my-transition-class--appear-active"
    transitionTimeout={300}
  >
    <div>Some text.</div>
  </TransitionInitialMount>
);

@import '~bpk-mixins/index';

.my-transition-class {
  transition: opacity $bpk-duration-sm ease-in-out;
  opacity: 1;

  &--appear {
    opacity: 0;
  }

  &--appear-active {
    opacity: 1;
  }
}

Props

Property	PropType	Required	Default Value
children	node	true	-
appearClassName	string	true	-
appearActiveClassName	string	true	-
transitionTimeout	number	true	-

isRTL

Returns true if the browser is showing content right-to-left.

Usage

import React from 'react';
import { isRTL } from 'bpk-react-utils';

if (isRTL()) {
  // do RTL stuff
} else {
  // do LTR stuff
}