axios.get accepts a request config as the second parameter (not query string params). You can use the params config option to set query string params as follows: axios.get(‘/api’, { params: { foo: ‘bar’ } });
useState hooks function argument is being used only once and not everytime the prop changes. You must make use of useEffect hooks to implement what you would call the componentWillReceiveProps/getDerivedStateFromProps functionality import React,{useState , useEffect} from ‘react’; const Persons = (props) => { const [nameState , setNameState] = useState(props) useEffect(() => { setNameState(props); }, [props]) … Read more
I think onMouseEnter and onMouseLeave are the ways to go, but I don’t see the need for an additional wrapper component. Here is how I implemented it: var Link = React.createClass({ getInitialState: function(){ return {hover: false} }, toggleHover: function(){ this.setState({hover: !this.state.hover}) }, render: function() { var linkStyle; if (this.state.hover) { linkStyle = {backgroundColor: ‘red’} } … Read more
Edit July 2015: currently the most promising framework based on immutability is Redux! take a look! It does not use cursors like Om (neither Om Next does not use cursors). Cursors are not really scalable, despite using CQRS principles described below, it still creates too much boilerplate in components, that is hard to maintain, and … Read more
Three things to note here the variable should be prefixed with REACT_APP_ eg: REACT_APP_WEBSITE_NAME=hello You need to restart the server to reflect the changes. Make sure you have the .env file in your root folder(same place where you have your package.json) and NOT in your src folder. After that you can access the variable like … Read more
Quick note: You are importing a class, you can’t call properties on a class unless they are static properties. Read more about classes here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes There’s an easy way to do this, though. If you are making helper functions, you should instead make a file that exports functions like this: export function HelloChandu() { } … Read more
In order to determine how to do this, it is helpful to look at how the default styling is done within Input. :before is used for the default and hover styling and :after is used for the focused styling. Here is a working example of how to style it: import React from “react”; import ReactDOM … Read more
As per React docs (webarchive source): What Should Go in State? State should contain data that a component’s event handlers may change to trigger a UI update. In real apps this data tends to be very small and JSON-serializable. When building a stateful component, think about the minimal possible representation of its state, and only … Read more
As Dan Abramov, author of redux says in this issue Both approaches of passing props down to children or connecting them to the store are appropriate, however having nested connect() components is actually going to give you more performance. The downside is they’re slightly more coupled to the application and slightly harder to test, but … Read more
You can’t configure it out of the box. But, a common pattern is to use some isMounted flag like so: // Is Mounted const useFetchNotOnMount = () => { … const isMounted = useRef(false); useEffect(() => { if (isMounted.current) { console.log(‘fetching’); dispatch(fetchData(filters)); } else { isMounted.current = true; } }, [dispatch, filters]); }; // Same … Read more