Below code is taken from reactjs.org, my question is how to handle the empty value in the below code. Alert should trigger only when there is some input from the user, it should not trigger if the input is empty Answer you should use an if statement at your handleSubmit function this way if value is equal to …
Tag: reactjs
How to get onMouseOver to work on both elements
I’m building an image slider with arrow keys above the image. I want to hide the arrow icons upon leaving the arrow icons and entering the image. I have gotten it to work on the left arrow icon but once I hover over the right arrow it doesn’t render only the left arrow allows both icons to appear.…
Change localization directory base on local storage item
In a particular step in the React stepper component, I have to change the directory based on a steps language. Unfortunately in one of the steps, the text is hardcoded into the images which requires me to make this change. The app uses i18next for localization. Currently, all images for this step are rendered…
Combining CSS and custom CSS properties inline on a react component
I need to pass custom CSS properties inline to a React component (Google Model Viewer in this instance),combined with more run-of-the-mill styles (background width, height etc.). There’s quite a lot of questions on using custom properties inline with react, but I couldn’t see one for specifically …
Typescript access object key dynamically
I have Theme.ts file like below In my button component I import above theme file like this –> import argonTheme from “../constants/Theme”; In my button component I want to get access to that color dynamically like this This line gives me typescript error –> const colorStyle = col…
What is the correct way for getting data from this object in ReactJS?
I’ve got ReactJs who is getting response from backend server. console.log(content) is looking like this: Now in my react app I can easily access to data with {content.price} eg. and I will get 75.284. Now trouble I’ve got is when accessing content.data. I can access to data and console.log it, whe…
How to Set Leaflet Map’s Zoom to Show All Markers in React Leaflet?
I have a React Leaflet map that needs to change its center and zoom when given a set of markers. The zoom should be changed such that all the markers are visible. This change of view is currently being attempted using the function ChangeView. Using my code below, I am able to move the map view, but not able t…
Passing parameters to event handler from a functional component without using inline syntax
I have following code where I need to pass index value to the event handler which I am getting as a prop from another component. How can I achieve this without using the inline syntax, as inline syntax is not considered as a good approach since it may lead to the creation of new function each time the compone…
how to toggle between two css classes view types with react
I have a List and Grid type display. How do I toggle between them in React. I want to toggle between jsGridView and jsListView classes. This is the vanilla js of the toggling of classes ** this is my react file where I have the display items and buttons to toggle. how do I implement the toggle event listeners…
Succeeded in fetching data, but it gives TypeError: Cannot read property ‘0’ of null
I have another problem today. ComponentDidMount seems to work fine(it brings data from the server), but when I try to use the data I received, it’d throw TypeError: Cannot read property ‘0’ of null. What I’m trying to do is to play one of the videos I received from fetching data from t…