Suppose I have two screens:   Screen A Screen B   I am initially landed on Screen A. When I click on a Button I navigate to Screen B. When I press Back Button, I am again navigated to Screen A.  I want to call an action creator when I am navigated to...
I have a Canvas component, which looks approximately like this:    class Canvas extends React.Component{      saveRef = node => {         this._canvas = node;     }          shouldComponentUpdate(){         /*I will never re-render this component*...
I'm new to this world and I need to understand some of the concepts of Backbone and Marionette. Here I'm trying to explain some of the concepts I'm learning. It would be great to having some feedback on them.  The render function defines...
What exactly componentWillReceiveProps and getDerivedStateFromProps are subtle question for me. Because, I just came across to an issue while using getDerivedStateFromProps:  // Component  state = {   myState: [] }  // Using this method works fine:...
I have my angular app set up with an ng-view directive in the index.html, with views configured with $routeProvider config and each view having its own controller. In one view controller, I have a $rootScope.$on listener that watches for events. I ex...
I am using recompose in my React project https://github.com/acdlite/recompose/  It's a great library. I'm using the compose utility as a container component that passes state down as props to the presentational component like so:  const enhan...
I'm looking for a way to check within pageLoad() if this method is raised during load event because of a postback/async postback or because of being loaded and access the first time.  This is similar to Page.IsPostback property within code behind...
Using React and Redux, imagine you have a component method that sends a request to an external API.  import React, { Component } from 'react'; import { connect } from 'react-redux';  class MyComp extends Component {    boolUpdate (val...
Cordova, Version 3.5.0-0.2.6  <body><script>       alert("documentready");      document.addEventListener("deviceready", function() {              alert("deviceready");           }, false);  </script></bod...
I have this code in my pure component:    componentDidUpdate(prevProps) {     const { scheduleSheet } = this.props;     const { scheduleSheet: prevScheduleSheet } = prevProps;      if (scheduleSheet !== prevScheduleSheet) {       this.setState({ boar...

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