When fetching data I’m getting: Can’t perform a React state update on an unmounted component. The app still works, but react is suggesting I might be causing a memory leak. This is a no-op, but it indicates a memory leak in your application. To fix, cancel all subscriptions and asynchronous tasks …
Tag: javascript
Why my canvas filter is not working even after rendering as canvas?
I am trying to develop a image filter using canvas.My image is converting to canvas as soon as it is loaded but the filter effect is not affecting the image at all,i.e., image is unchanged in canvas. Now i updated my javascript,it is working if the image is taken from other sites but if i am taking image from…
JavaScript vs Node.js
I have simple “to-do” application written in JavaScript and HTML. I don’t even have CSS file, just have bit of in-line style in index.html file where I have linked my JavaScript file. No database or any other stuff needed. Simple app using vanilla JavaScript and HTML. I have AWS free tier ac…
Async task manager with maximum number of concurrent “running” tasks
I am trying to implement two classes that can deal with asynchronous tasks in JavaScript: Class Task: mimics the execution of a task with setTimeout. Once the timer expires, the task is considered completed. Class TaskManager: has a capacity parameter to limit the numbers of tasks that can be executing in par…
Unable to upgrade laravel framework from 5.5 to 5.6 or 5.7 on an existing project
I am trying to upgrade my laravel project framework to 5.7 from 5.5 but unable to do it .. when i change composerjson requres as laravel upgrading documentation and hit composer update on project terminal its output me these: and this is my composer.json tried many ways available on internet but still hanging…
THREE.js raycasting very slow against single > 500k poly (faces) object, line intersection with globe
in my project I have a player walk around a globe. The globe is not just a sphere, it has mountains and valleys, so I need the players z position to change. For this I’m raycasting a single ray from player’s position against a single object (the globe) and I get the point they intersect and change…
Set unique ID to SVG graph path
How to set unique ID to SVG graph path elements. The graph is created using leaflet.js Path elements are dynamically generated and I need to style them individually, so I thought of giving them unique ID. Please help. Answer As I’ve commented you don’t need an id for styling. You can use nth-of-ty…
What is the difference between class fields and properties in Javascript
I’m reading class fields proposal for JavaScript. I don’t understand why the authors call it ‘fields’ and not properties. MDN docs in class article speak about instance properties declared inside constructor and in next section about field declarations declared using new syntax. What i…
Saving a files in React-Native using react-native-fs library
After saving a file using react-native-fs where does that file go? It’s not explained in the documentation or I couldn’t find and it’s hard to figure. Answer When you create a file you have to specify a directory where to store the file. In the example below the path variable shows where the…
How to escape HTML string on Moment.js formatter inside Vue template?
Let’s say I have a current date filtered to February 22nd 2019. I want the nd sign to be inside the <sup class=”small”></sup> tag. The problem is, I’m using Vue and Moment.js at the same time. In PHP, I could just do: {!! CarbonCarbon::today()->format(‘F d<sup c…