React Inline Transition Group

Helps to control transitions defined using inline styles. Build upon ReactTransitionGroup, the aim is to supply a component similar to ReactCSSTransitionGroup, but that instead of working with CSS classes work with inline styles. This approach bring some advantages like:

• You don't need to decouple your styles from the component.
• You don't need to supply timeout properties as in ReactCSSTransitionGroup because the component can infer them based on the style object you pass to it.
• You have callbacks to control the start and end of your transitions for each children.

Demo

Check out the demo.

How to install

npm install react-inline-transition-group

How to use

Import the component to your project and then wrap the nodes you want to control the transition with it. Example:

var React = require('react');
var Transition = require('react-inline-transition-group');

React.createClass({
  getInitialState: function () { return { count: 1 }; },

  handleAdd: function () {
    this.setState(function (previousState) {
      return { count: previousState.count + 1 };
    });
  },

  handleRemove: function () {
    this.setState(function (previousState) {
      return { count: Math.max(previousState.count - 1, 0) };
    });
  },

  leaveCallback: function (id) { console.log(id + ' left'); },

  render: function () {
    var styles = {
      base: {
        background: '#F00',
        width: '500px',
        height: '50px',
      },

      appear: {
        background: '#FF0',
        transition: 'all 500ms',
      },

      leave: {
        background: '#F00',
        transition: 'all 250ms',
      }
    };

    var elems = [];

    for (var i = 0; i < this.state.count; i++)
      elems.push(<div key={i} id={i}>{i}</div>);

    return (
      <div>
        <div>
          <button onClick={this.handleAdd}>Add</button>
          <button onClick={this.handleRemove}>Remove</button>
        </div>
        <Transition
          childrenBaseStyle={styles.before}
          childrenAppearStyle={styles.appear}
          childrenEnterStyle={styles.appear}
          childrenLeaveStyle={styles.leave}
          onChildLeft={this.leaveCallback}
        >
          {elems}
        </Transition>
      </div>
    );
  }
});

Properties

Observation: You can pass an id property to your children components and the callback will be called with it so you know exactly for which child the event is happening. This id is optional.

Observation 2: The start callbacks will be called sooner a node is being add or removed to the group. It doesn't matter if you have a delay or not. The end callbacks will be called when the longest transition time (delay + duration ) completes.

Observation 3: If you add a React component to the group make sure its root node is able to receive a style property.

LICENSE

BSD-3