Comments (10)
@Frazer The overhead of creating a function during render is rarely a performance problem. We do it all the time to add event handlers, map arrays, etc. The new hooks API also makes heavy use of this pattern for hooks like useEffect
and useMemo
(which require creating a function every render, even if it's not called every render).
When it can be a problem is when it breaks memoization and causes a performance sensitive subtree of your application to re-render when it would otherwise not have re-rendered. This is something the DevTools Profiler UI can help you identify and fix though.
from reactjs.org.
will work on this
from reactjs.org.
This issue is all yours! 😄
I've added an "in-progress" label so that others will know not to start work on the issue. If you change your mind about the issue, no worries! Just let me know so that I can remove the label and free it up for someone else to claim.
Cheers!
from reactjs.org.
This topic was also been suggested for the FAQ in #29, so I included some comments in PR #43 (diff).
It might be a good idea to merge the docs on this subject, or link from one to the other.
from reactjs.org.
I think @hedgerh suggestion should also be included.
<button name='23' onClick={this.deleteRow}>Delete Row</button>
deleteRow (e) {
// do some action to (e.target.name)
}
from reactjs.org.
@Frazer added to the FAQ version of this topic: b2ef5ff
from reactjs.org.
Closed by #81 I think
from reactjs.org.
@StokeMasterJack @bvaughn There is also a third way through currying (see How to pass variables to a function reference?, thx @esthercuan) 👍
deleteRow = id => event => {
event.preventDefault();
console.log('row ${id} deleted');
}
<button onClick={this.deleteRow(23)}>Delete Row</button>
from reactjs.org.
from reactjs.org.
how many times do we need to have this debate in react.
from reactjs.org.
Related Issues (20)
- Adding description to types HOT 2
- broken Link ! HOT 2
- 1. You might have mismatching versions of React and the renderer (such as React DOM) 2. You might be breaking the Rules of Hooks 3. You might have more than one copy of React in the same app See https://react.dev/link/invalid-hook-call for tips about how to debug and fix this problem., js engine: hermes
- Resetting state docs improvement HOT 3
- Social Icons not Vertically centered in Footer Section HOT 1
- Resetting state docs improvement 02 HOT 1
- Incorrect href in React learning documentation HOT 2
- Needed documentations for error boundary in react.dev
- Unnecessary Horizontal Scrollbar in Learn Section - Reacting to Input with State subsection - First city quiz - index.js
- [Suggestion]: Adding an Explanation Text to Optimizing Re-renders in useContext Section
- [Typo]: Inconsistency in the <form> element docs HOT 1
- Not found(ko.react.dev) HOT 1
- [Bug]: the scrollbar on the sidebar - not being clickable with the mouse HOT 2
- [Bug]: The "react.dev" survey asks about "beta.reactjs.org" documentation HOT 1
- Inavlid hook call HOT 3
- [Bug]: all new sandboxes (with ShowRenderedHTML) break HOT 2
- ReactDOM.render render to body without warning HOT 1
- [Typo]: `crossOrigin` and `as` values content HOT 1
- Broken link
- Left-Scroll-Bar[Bug]: HOT 3
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from reactjs.org.