Tag: reactjs

How select part of text in a Textfield on onFocus event with material-UI in React?

javascript material-ui reactjs textfield

I have a modal form with material -UI TextField in react app, I have a default value, es. a file, and i would select only the name of the file no the extension when the element is load…. I did this code inside the tag TextField: but this will select all text inside the textField. How can I select only

How do i use/print the value inside a generic attribute in TestCafe

e2e-testing javascript reactjs testcafe testing

What I’m trying to do is print/use the value of the Polyline attribute. I’ve tried to get them with these methods: This is an util function This is inside the test script or And I include my selectors external But all I get is a promise as output in the console log Promise { } or ReExecutablePromise { _then: [],

Jest test: Cannot find module, in typescript component import

javascript jestjs next.js reactjs typescript

The path to my styled objects is correct, however not sure why I’m getting the following error: Cannot find module ‘../../shared/models’ from ‘Astronaut.tsx’ import { moonHoldings } from ‘../../shared/models’; My simple Jest test: The Astronaut component The Jest config section of my Package.json And my folder structure: Answer Ok I just fixed this by created an index file inside of

React suspense/lazy delay?

javascript reactjs

I am trying to use the new React Lazy and Suspense to create a fallback loading component. This works great, but the fallback is showing only a few ms. Is there a way to add an additional delay or minimum time, so I can show animations from this component before the next component is rendered? Lazy import now Waiting component:

Material-UI: Uncaught RangeError: Maximum call stack size exceeded

javascript material-ui reactjs

I’m using the Dialog and Select components from Material-UI and React. Just an example: After clicking on the select, i’m getting this error from Modal.js: “Uncaught RangeError: Maximum call stack size exceeded. at HTMLDocument.Modal._this.enforceFocus (Modal.js?86a5:197)” Any ideas? Answer Add the prop disableEnforceFocus to the Dialog component. Reference: issues/10341

How to call a parent function from a child – react-native

javascript react-native react-native-ios reactjs

I’m struggling to find a solution to my problem , but i cannot find it anywhere . So my question is how to call a parent function from a child . The function has to be passed in a onPress={()} inside the child Parent.js Child.js } Answer This is a common mis-understanding, so you’re in good hands. You’re going to

Is it okay to call onClick on an anchor tag in ReactJS

javascript reactjs

Folks, I have an anchor tag inside my component like so: I want to call an analytics function when user clicks on this tag like so: Notice that I’m not setting state or calling any of the react functions. Is it okay if I just call a function on the onClick event of the anchor tag? Something like this: with

react useEffect comparing objects

javascript react-hooks reactjs

I am using react useEffect hooks and checking if an object has changed and only then run the hook again. My code looks like this. Unfortunately it keeps running as the objects are not being recognised as being the same. I believe the following is an example of why. Perhaps running JSON.stringify(apiOptions) works? Answer Use apiOptions as state value I’m

The useState set method is not reflecting a change immediately

javascript react-hooks reactjs

I am trying to learn hooks and the useState method has made me confused. I am assigning an initial value to a state in the form of an array. The set method in useState is not working for me, both with and without the spread syntax. I have made an API on another PC that I am calling and fetching