So I have this:  let total = newDealersDeckTotal.reduce(function(a, b) {   return a + b; }, 0);  console.log(total, 'tittal'); //outputs correct total setTimeout(() => {   this.setState({dealersOverallTotal: total}); }, 10);  console.log...
I am very new to React JS (as in, just started today).  I don't quite understand how setState works.  I am combining React and Easel JS to draw a grid based on user input.  Here is my JS bin: http://jsbin.com/zatula/edit?js,output  Here is the co...
so I was programming an app with React and what happened is that I have a component with a fairly large list in its state. I am fetching a JSON file from network and then storing a filtered copy directly to component's state. Might be unoptimal s...
I'm still learning React and working on coding John Conway's Game of Life. I have created a game board for the game using a 2D array in state. I have this 2D array stored in state in my App.js. I also have two functional components, Gameboard...
I have this screen under a DrawerNavigator:  class myScreen extends Component {     state: Object;      constructor(props) {         super(props);          this.getBeers();          this.state = {             is_loading: true,             beers: null...
From React DOCS:  https://reactjs.org/docs/state-and-lifecycle.html     State Updates May Be Asynchronous      React may batch multiple setState() calls into a single update for performance.   This makes total sense. If you have something like the fu...
With this code, I am able to successfully use setState on a simple object – when I click on "Joey" the name changes to "Igor".      class Card extends React.Component {         myFunc = () => {this.props.change('Igor')};...
I'm new to ReactJS and I'm trying to understand state and setState(). Using setState() I wanted to change a name, but I am not sure where I should call the setState() method in my code:   Inside the constructor OR Inside the render method OR...
I have two <select> inputs. I want to set the attribute as "disable" one of them at a specific value option from the other <select>.  The first one is:  <select ref="selectOption">    <option selected value="1...
I can't get rid of this error. It's happening when i delete one item from my array and update the state.  After some debugging, i've discovered that if i reload the app, go directly to this screen and delete, the error doesn't show. B...

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