The props on the ‘GameState’ component do not update correctly after changing their state from, they are always one iteration behind what the actual value of the state is as shown in the GIF and the sate is always one iteration behind when I try console.logging it too expected values: Code at the GameInfo component: Answer Set state is async,
Tag: react-state
Why .then() which is in useEffect is not updating my state
targetMovie is null when it comes to rednering. I couldn’t find any solutions. First time having unsolvable problem. Please help! Answer You need to represent 3 states: You’re currently waiting on getMovie to complete getMovie completed successfully getMovie completed and returned null/undefined You’re currently using the same condition (!targetMovie) to represent both 1. and 3. which is why you’re running
React native, the useEffect on a object state not working
Here is the code before the render So the state of HHDays stays null and the render shows an error on the frist {HHDays.allWeek.from} TypeError: null is not an object (evaluating ‘HHDays.allWeek’) Answer useEffect is called after the component was rendered. So when the code reaches that line the first time around, it tries to read null.from. Maybe you’d want
react – not able to update state in input value
I am learning react and I want to create a simple form where the input value changes and updates once the user types it in. I have this code where the input value updates the state when it is being typed, but when I press enter, the old state returns. I did lots of googling but can’t seem to make
Unable to set state after getting document data from Firestore
I am trying to do a User Profile page and after getting the data from Firestore, I’m unable to set the data into the userProfile state. I got this error: The console log shows that the userProfile state is undefined, however, I can retrieve the data from Firestore without any issues as shown in the console log. Answer Instead of
React state update not working with setState
Okay so it’s simple I have an array of answers inside an array of questions. the user has the option to select more than one answer. When an answer is selected, the text should change to selected and unselected if it isn’t selected. These are the steps i’ve tried to update my state step 1 using map step 2 using
More elegant way of checking all state values
Is there a more elegant way of checking all state variables in my react app ? I currently have 14 state variables within my app, I am checking the value of each and updating to an empty string if they do not pass validation (left empty) code is as: This does work, so its not the end of the world,
React JS – Change parent state on child click, map not iterable
I am new to React and dev in general, but I am struggling to figure out how to achieve what I am trying to do. I feel as though I may have missed something along the way. My goal is to have a list of items, that which on clicked individually, will toggle the visibility of their information. The problem
Conditional rendering in React based on current component state
I am struggling with figuring out how to implement conditional rendering in React. Basically, what I want to do is this: if there is a reviewResponse in the reviewResponses array, I no longer want to render the reviewResponseForm. I only want to render that ReviewResponse. In other words, each review can only have one response in this app. I am
Function variable value resetting after calling this.setState
I am relatively new to the JavaScript world, i am learning react and have encountered a weird issue see this code here i am concerned with the newPrice variable which is used update the state when more items are added, which works fine problem is after the this.setState return the newPrice gets retested to 0 again so i can’t use