I have a form in a page, when the user inputs the name of a new student and clicks submit, I want the content of that component (the form) to be completely replaced by the submitted name. How can I achieve this (Replace the form with the list onsubmit)? I have read that I can use conditional rendering to togg…
Tag: rendering
TextInput gets unfocused after typing each character
I’m using React to build a form and I’m trying to filter a list with the SearchInput (which works the same as TextInput) located in the child component Header. But everytime I type a character the SearchInput gets unfocused Answer Oh, I think I can see the problem now – it’s the way yo…
Uncaught TypeError: Cannot read properties of undefined (reading ‘toString’)
I am developing a React app and I don’t know how to solve this error. I’m pretty sure it’s from my useEffect function, but I can’t figure out what’s wrong. Any help would be much appreciated, thank you! Answer The problem isn’t in this part of the code. In error, you can se…
How to automatically generate and draw a smooth curve between two surfaces in JS?
I would like to be able to automatically generate smooth curves between two (flat) surfaces of DOM elements in JS, similar to the Curved Connector in Google Slides: In GS, you can add a Curved Connector and then plug each end into any other anchor point. If the target anchor point belongs to a surface, the co…
TypeError: Cannot read property ‘_id’ of undefined ReactJs?
I am trying to get the name of a user based on the user id, using a .map() method. The code that I wrote seems good to me, however, I get the error mentioned in the question title and the page won’t render. See the image below: Here’s an image of the error stack: And here’s the code I have:
Rendering Content Conditionally in React JS Based on the state
I have a page that renders questions that have been posted. I want to create a button that displays only answered questions based on the state = {isAnswered: true}. Is the state isAnswered is true then onClick will display answered questions only where isAnswered is set to true in the object. How can I used t…
D3 / Canvas: Axis not displayed
i have the following issue: I want to create a simple chart using the d3 library and the canvas rendering. I don’t see anything in my browser – but, if I inspect the element, the Axis is ‘compiled’ in the code and I can hover over every tick in the code while the position in the DOM is…
Three.js + OrbitControls – Uncaught TypeError: Cannot read property ‘addEventListener’ of undefined
I am tryint to use OrbitControls in THREE.js. If I removed the line let cameraControl = new OrbitControls(camera) from below, there will be no error. But now, I have “Uncaught TypeError: Cannot read property ‘addEventListener’ of undefined” I tried to change OrbitControls(camera) to TH…
Post Effects and Transparent background in three.js
Trying to use the transparent background with some post effect like the Unreal Bloom, SMAA and Tonemapping provided in the examples but it seems to break the transparency from my render. If I deactivate the bloom pass I get a correct transparent background but when activated, I obtain a black background. I lo…
fullcalendar event rendering performance issue
So, basically all my events(there’s min. 360 of them) have team1 vs. team2 or – vs. team2 or team1 vs. – placeholders. And on the initial render events change color depending on whether the event has one or two teams. Orange color for the one team , and green for the two teams. Also, the eve…