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We want to hear from you! Take our 2020 Community Survey! React Docs Tutorial Blog Community v 17.0.2 Languages GitHub June 08, 2021 by Andrew Clark , Brian Vaughn , Christine Abernathy , Dan Abramov , Rachel Nabors , Rick Hanlon , Sebastian Markbåge , and Seth Webster The React team is excited to share a few updates: We’ve started work on the React 18 release, which will be our next major version. We’ve created a Working Group to prepare the community for gradual adoption of new features in React 18. We’ve published a React 18 Alpha so that library authors can try it and provide feedback. These updates are primarily aimed at maintainers of third-party libraries. If you’re learning, teaching, or using React to build user-facing applications, you can safely ignore this post. But you are welcome to follow the discussions in the React 18 Working Group if you’re curious! When ...

We want to hear from you! Take our 2020 Community Survey! React Docs Tutorial Blog Community v 17.0.1 Languages GitHub In most cases, we recommend using controlled components to implement forms. In a controlled component, form data is handled by a React component. The alternative is uncontrolled components, where form data is handled by the DOM itself. To write an uncontrolled component, instead of writing an event handler for every state update, you can use a ref to get form values from the DOM. For example, this code accepts a single name in an uncontrolled component: class NameForm extends React . Component { constructor ( props ) { super ( props ) ; this . handleSubmit = this . handleSubmit . bind ( this ) ; this . input = React . createRef ( ) ; } handleSubmit ( event ) { alert ( 'A name was submitted: ' + this . input . current . value ) ; event . preventDef...

We want to hear from you! Take our 2020 Community Survey! React Docs Tutorial Blog Community v 17.0.1 Languages GitHub December 21, 2020 by Dan Abramov , Lauren Tan , Joseph Savona , and Sebastian Markbåge 2020 has been a long year. As it comes to an end we wanted to share a special Holiday Update on our research into zero-bundle-size React Server Components . To introduce React Server Components, we have prepared a talk and a demo. If you want, you can check them out during the holidays, or later when work picks back up in the new year. React Server Components are still in research and development. We are sharing this work in the spirit of transparency and to get initial feedback from the React community. There will be plenty of time for that, so don’t feel like you have to catch up right now! If you want to check them out, we recommend to go in the following order: Watc...

React Docs Tutorial Blog Community v 16.8.6 Languages GitHub Handling events with React elements is very similar to handling events on DOM elements. There are some syntactic differences: React events are named using camelCase, rather than lowercase. With JSX you pass a function as the event handler, rather than a string. For example, the HTML: < button onclick = " activateLasers() " > Activate Lasers </ button > is slightly different in React: < button onClick = { activateLasers } > Activate Lasers </ button > Another difference is that you cannot return false to prevent default behavior in React. You must call preventDefault explicitly. For example, with plain HTML, to prevent the default link behavior of opening a new page, you can write: < a href = " # " onclick = " console.log( ' The link was clicked. ' ); return false " > Click me </ a > In React, this could instead...

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