I’m trying to toggle between two classes dark mode and normal mode. THis is the vanilla js eventlistener This is the button that when clicked on, switches between the two modes. how can I achieve this with react Answer In this case you could use useRef:
Tag: reactjs
Pass triggering button’s name as props to child modal in React
I am a beginner in React so please be patient with me )) I have a parent component with two different buttons that trigger a child component which is a Modal that must show different data inside it depending on which button has triggered the Modal. Both components are functional components. The child Modal is supposed to receive the triggering
How to update state of array element during listener in React?
I’m working on a web app that reads sensor data to gauge objects via socket.io. The function addNewGauge() adds an element to the component’s array of gauges, but I also want to install a socket.io listener for that element. The addNewGauge() function works, and the listener is picking up the event, which I know because the error below occurs for
React JSX Dynamically changing the state of a component. Best practice and why
I am pretty new at React and am following a video on youtube and working along + adding some more on top of it. I have a button which when clicked, it decreases the value of object. In the video, the teacher copies the state to a new array, finds the index of the item, does the manipulation needed, and
Can’t set state in js react-native
Getting error while trying to setState in React Native. Code Error TypeError: undefined is not an object (evaluating ‘_this.setState’) Answer useState Hook Functional components don’t have access to setState method but useState hook. useState hook works by defining the name of value, e.g. foo followed by it’s setter. It’s a convention to name the setter with the same name as
Configure i18next to use warning logs instead of default info level
Currently I have many logs by i18next that make difficult to use the console: I need i18next to use warning level instead of default info level, in order to be able to filter them. Im checking docs but I dont see any option. My current configuration is: Answer You can disable debug: false, which will disable the default console.log stuff.
Using external script (in JavaScript) in Gatsby JS
I am trying to load a JavaScript code on my gatsby app. Inside my static folder on my root folder I created a code called script.js. Here’s the snippet inside: Then on my Layout component, I tried to use helmet to include this: But this returns this error: I am not sure if I should place my script inside an
Conditional display of component based on Route matching
I am looking to conditionally render a component based on the route (using React Router), and the component should return null if it matches any path pre-defined in an array or some sort of similar data structure, where I do not have to be reliant on a <Switch>/<Route> setup. Currently here is what I have but it is clearly inefficient
Toggle style by clicking on button using styled-component
After onClick, it starts function onToggleLiked in app.js which toggle like property and return(or not) like to item.js. After that, AppListItem check if like has appeared, and use styles from const theme if the result is true, else – from defaultProps. How to do that? I’ve tried to create a function, but failed. Answer You can simply spread the desired
Updating useState without inserting another object
This is the full code of the component, I am so tired that I can’t think much on how to solve this problem These are results of localStorage value, the problem is instead of changing the value of inCart of the specific object, it’s creating a new object with property “inCart”. Any suggestions will be appreciated. Thank you ! EDIT: