I’m creating a simple class, but I get an error that I can’t understand. My class is very simple: But when I run in terminal with node script.js I always get an RangeError: Maximum call stack size exceeded error…. Where is the mistake? Thanks! Answer In ECMAScript (which defines JavaScript),…
Category: Questions
How to stop ReactJS countdown timer from re-rendering?
I’m currently using a simple Countdown Timer component. This is the code of the component: My issue is that everytime I refresh my page, the timer starts again. I understand this has something to do with react re-rendering the components and I need to move this to a higher level to save state, but IR…
IsNaN shows other results
console output My IsNaN says “12ab” is a number but at the first Non-Number argument its the first non-number, i used the isNaN function twice so idk why it doesnt work Answer You’re not comparing the same values here: the first check (saveNumbers) tests isNaN(parseInt(“12ab”)) w…
How to return a derived function that use fetched data from db based on value of another writable value in svelte/svelte kit?
I am trying to get my language table’s data from db in store.js and modify that data based on the language user selected. So the selected language is a writable variable and I need to get a derived function that returns the modified data. Here is my code in store.js Here is the code in my +page.svelte I…
Increasing a progress bar by clicking a button
The idea is that the progress bar should increase when you click the button, for example, if you click on the button play the happiness should increase. Answer There are many issues and typos in your code. Clean programming will solve them all. You want a bar for which HTML has a specific tag for: <progres…
how to create a dynamic div on a React JS, and second is how to give that div a dynamic ID, this code below is JS code?
How to rewrite this code with React.js? Full code: Answer You can actually do this in your components render function, it would look something like this Assume that div with id board is your board where you append created elements. Also I’m not sure what updateTile do, so if you would need some help wit…
Unable to select certain fields in MongoDB (Mongoose) result
I’ve ran into a bit of an odd issue with a mongoose result. I can select one value from the object, but not another. For example I’m calling I get a result and im console logging out the entire product. The result is: I can log out the storePrice field However if I try to log out the dropDate and
Date.getTime() in Next.js returns weird numbers
I am trying to make a page transition in Next.js. As the transition is slower than the page load, I need to calculate the missing time for the animation to finish. The transition should last at least 2 seconds, 1s for a fade in of the loading screen, 500ms so that the loading screen stays a little, and 500ms …
Can image load event be synchronous, or will it always be asynchronous?
Let’s say I have the following code: The question is – if the image in external_string is already in browser cache, or maybe is base64 encoded, or whatever – can it so happen that the load event is called immediately at the same line as src is being assigned? Note: I actually want it to be a…
React Testing with Jest and useParams-hook, tried with MemoryRouter
How do I test a component which needs the parameter from react-router to work? Carousel.js component Carousel.test.js The test works if I comment the line with useParams out and just declare const id = 1;. Then I’ve tried to use MemoryRouter. Carousel.test.js v2 And the test failed with this output It s…