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 know that React may perform state updates asynchronously and in batch for performance optimization. Therefore you can never trust the state to be updated after having called setState. But can you trust React to update the state in the same order...
In my react component im trying to implement a simple spinner while an ajax request is in progress - im using state to store the loading status.   For some reason this piece of code below in my React component throws this error      Can only update a...
I have a todo list and want to set the state of that item in the array to "complete" if the user clicks on "complete".  Here is my action:   export function completeTodo(id) {     return {         type: "COMPLETE_TASK",...
I'm still fairly new at React, but I've been grinding along slowly and I've encountered something I'm stuck on.   I am trying to build a "timer" component in React, and to be honest I don't know if I'm doing this right...
Regarding iPad events, how to determine if/when the iPad is changing from an awake state to a standby state?  What I would like to do is put my Mobile-Safari web app in a locked state whenever the iPad becomes inactive/standby and ask for a PIN when...
I'm writing a module that takes article data from json and shows a large image over the article text, a hero module as they say.  I've got the data and have set it up so if there is an image, it will show that image and if there is no image i...
Let me preface this by saying I am a novice to ReactJS. I am trying to learn by making a simple site that populates data using React. I have a JSON file that contains link data that will be looped through with map.   I have tried setting it as the co...
I want to load a different image(fake avatar) while the final avatar image is loading. The idea is to detect when the prop image is loaded and change a state. Is it possible? Some ideas? Thank you!  class ImageUser extends React.Component {  construc...
I am creating a simple chat app where I make an api call to my database via axios which returns an array of message objects. I am able to get the data when I make an axios call in componentWillMount. Then I am trying to setState to display the conver...

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