Created
October 14, 2016 09:10
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On a Blind Date with React: Animating the instructions
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| componentDidMount() { | |
| this._tl = new TimelineLite({ paused: true }); | |
| // Fade out the content and set it to `visibility: hidden` | |
| // See: http://greensock.com/docs/#/HTML5/GSAP/Plugins/CSSPlugin/ | |
| this._tl.to(this._contentEl, 0.5, { autoAlpha: 0 }); | |
| // Shrink it down to zero width | |
| this._tl.to([el, this._contentEl], 0.5, { width: 0, padding: 0 }); | |
| // Hide it completely so it's not considered in the flexbox | |
| // layout algorithm anymore | |
| this._tl.set(this._contentEl, { display: 'none' }); | |
| if (!this.props.visible) { | |
| // If we need to hide at the start, we'll start playback | |
| // from the end of the timeline, essentially moving directly | |
| // to its end state | |
| this._tl.play(this._tl.endTime()); | |
| } | |
| }, | |
| componentDidUpdate(prevProps) { | |
| if (!prevProps.visible && this.props.visible) { | |
| // Reverse the timeline if we become visible | |
| this._tl.reverse(); | |
| } | |
| if (prevProps.visible && !this.props.visible) { | |
| this._tl.play(); | |
| } | |
| }, |
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