After putting off testing for a while now due to Cypress not allowing visiting chrome:// urls, I decided to finally understand how to unit/integration test my extension – TabMerger. This comes after the many times that I had to manually test the ever growing functionality and in some cases forgot to che…
Tag: reactjs
Updating react state when receiving an array of object
I am using an axios.get to make a call to my MongoDB. My response from the DB is an array of objects containing all the data from the database. I am only trying to save the username of each user to state. I am trying to set the response (res.data.username) to my state however when i log my state I
Uncaught ReferenceError: regeneratorRuntime is not defined in react 17, webpack 5 while making api calls through actions
Having this error Uncaught ReferenceError: regeneratorRuntime is not defined when trying to make a api call using superagent. Currently i am using react 17, webpack 5 along with css modules and all latest packages. package.json babel.config.js webpack.config.js Answer For Babel 7, install these two dependenci…
Optimizing React App’s Size In Production with Amcharts
I’m using amcharts (amcharts4) with React app(generated using cra). I was able to successfully exclude few dependencies(cpexcel, canvg, pdfmake) using webpack Externals in webpack.config file (node_modules/react-scripts/config/webpack.config.js) like this: I also want to exclude the xlsx dependency, but…
material-ui tabs with nextjs?
I have a project in material-ui, nextjs and typescript. I’m trying to get my navbar to work with nextjs: But it causes the build to fail. Is there something I’m missing? Answer In this case, I believe you want to wrap the <Tab /> elements with the <Link /> ones.
useState not working with Array of Objects
So I am working with React Hooks and with an array of names which will have buttons. On clicking those buttons the corresponding name would disappear. But the array is not updating at all. Please advise what can be done, I’m a newbie in React. Thank you! Answer You are using your data variable which nev…
Why my props action doesn’t work in an “if” statement in “onClick”, but it works outside the “if” statement?
This code works: This code doesn’t work: I’m new to reactjs Does any body know why it doesn’t work in the second way? Answer Just a tip; Make a function and then call the funciton onClick instead. The code gets simpler to read!
use tailwind classes into styled-components
Can I use tailwind classes ( like colors ) into the styled-components ? I want to use some classes instead of CSS styles to style my components this is the way add class in styled-components: so unlike styles, attrs className is only one single string, and I want to add classes for size, color, display and et…
Recharts — Is there a way to add a padding between the chart and labels for RadarChart?
I’m looking at the simple RadarChart example from their website and I would like to add some padding between the labels and the chart itself but there doesn’t seem to be a simple way to do this. Can this be done somehow or can someone suggest another chart library I could use? Answer You can do it…
Can’t perform a React state update on an unmounted component with fetch POST method
I get this warning when i use my fetch post method how can I cancel all subscriptions and asynchronous tasks in a useEffect cleanup function.With my Post methods. Warning: Can’t perform a React state update on an unmounted component. This is a no-op, but it indicates a memory leak in your application. T…