Released! At  #reactnative #ios #androiddev

  • Each screen has its own representative icon that is shown on the application’s header – the icon of the screen shown in the viewport is always centered, and depending on which screen you’re in, the icons of the remaining screens are shown on the left/right edges of the header.
  • Clicking on any of the left/right icons will cause a screen transition, also allowing for the icons themselves to animate while the transition is in progress.
  • The library takes care of the screen and header transitions, and leaves it up to the user to define animations that occur on the icons during the transitions.
  • At the moment in which this was developed, react-navigation did not provide screen transitions from left to right, and the header transitions were difficult to customise.
  • We have thereafter integrated this project into others that are using react-navigation with excellen results, given that this navigator behaves as any other screen in the app.

A tinder style navigator that allows you to navigate between three adjacent screens with smooth header transitions.
Continue reading “react-native-tinder-navigator”

Mapbox GL JS + React – Points of interest

Mapbox GL JS + React  #react #product #frontenddevelopment #redux #javascript #reactjs

  • What’s shown to the user when a component calls render() is conveniently managed internally allowing an implementor to work on higher level tasks like how an interface behaves.What can be confusing is connecting React with other libraries that manipulate the DOM and manage state (like Mapbox GL JS).
  • The wrapper permits customization like size or title, and the technical details that should always be the same (event handling of key bindings or accessibility) is tucked away in the lower level modal component.So it’s natural to look for a Mapbox / component within the React ecosystem (see react-map-gl or react-mapbox-gl as example).
  • The map is initialized within componentDidMount and its container value is set as the assignment of this.mapContainer which is React’s way of providing direct access to the DOM node.Let’s explore some more in-depth examples:Basic exampleSee full example on GitHubIn this example, React passes position data as state to the map.
  • This could also be prop data passed from a higher level component but in the interest of containing the entire app as one component I’ve used state.Reactive tooltip exampleSee full example on GitHubThe details to note are:Data found in vector tiles is collected under the mouse cursor using queryRenderedFeaturesA mapboxgl.Marker instance is used to display the collected data on the map (Mapbox GL JS controls its position on the map) but the contents of the marker is React powered using ReactDOM.render.Fetching map data like this isn’t exclusive to tiles directly from Mapbox.
  • To learn more how we use Redux in Mapbox Studio, check out, Redux for state management in large web apps by David Clark.I hope this helps as a primer on using Mapbox GL JS alongside React and provides some context for how we achieve a few different concepts here at Mapbox.

When we build web applications at Mapbox we often turn to React and Mapbox GL JS. The goals of each library work powerfully in combination and I’d like to share some techniques into how we approach…
Continue reading “Mapbox GL JS + React – Points of interest”

Why The Hipsters Recompose Everything – JavaScript Inside – Medium

Why the hipsters recompose everything:  #ReactJS

  • It’s important to note that these functions are catered towards function components but should work for class components none the less.
  • High order components are functions that expect a component and return a new component.
  • After creating the factory we return a new function which applies the mapping function with the passed in props.
  • mapProps expects a mapping function which returns a new function that itself awaits a component.
  • const enhance = mapProps(props => omit ([‘foo’] , props))

Building a Utility Library for React
Continue reading “Why The Hipsters Recompose Everything – JavaScript Inside – Medium”