React onClick and preventDefault() link refresh/redirect?

A full version of the solution will be wrapping the method upvotes inside onClick, passing e and use native e.preventDefault();

upvotes = (e, arg1, arg2, arg3 ) => { e.preventDefault(); //do something... } render(){ return (<a type="simpleQuery" onClick={ e => this.upvotes(e, arg1, arg2, arg3) }> upvote </a>); { 

try bind(this) so your code looks like below --

 <a className="upvotes" onClick={this.upvote.bind(this)}>upvote</a> 

or if you are writing in es6 react component in constructor you could do this

constructor(props){ super(props); this.upvote = this.upvote.bind(this); } upvote(e){ // function upvote e.preventDefault(); return false } 

In a context like this

function ActionLink() { function handleClick(e) { e.preventDefault(); console.log('The link was clicked.'); } return ( <a href="#" onClick={handleClick}> Click me </a> ); } 

As you can see, you have to call preventDefault() explicitly. I think that this docs, could be helpful.

render: -> <a className="upvotes" onClick={(e) => {this.upvote(e); }}>upvote</a>

A nice and simple option that worked for me was:

<a href="javascript: false" onClick={this.handlerName}>Click Me</a> 

The Gist I found and works for me:

const DummyLink = ({onClick, children, props}) => ( <a href="#" onClick={evt => { evt.preventDefault(); onClick && onClick(); }} {...props}> {children} </a> ); 

Credit for srph https://gist.github.com/srph/020b5c02dd489f30bfc59138b7c39b53

I didn't find any of the mentioned options to be correct or work for me when I came to this page. They did give me ideas to test things out and I found that this worked for me.

dontGoToLink(e) { e.preventDefault(); } render() { return (<a href="test.com" onClick={this.dontGoToLink} />}); } 

This is because those handlers do not preserve scope. From react documentation: react documentation

Check the "no autobinding" section. You should write the handler like: onClick = () => {}

<button className="upvotes" onClick={this.upvote}>upvote</button> 

HTML Button should be used if you want to execute Javascript script without navigating to a new page.

If using a href without a proper address, eslint would throw:

The href attribute requires a valid value to be accessible. Provide a valid, navigable address as the href value. If you cannot provide a valid href, but still need the element to resemble a link, use a button and change it with appropriate styles.

jsx-a11y/anchor-is-valid suggests:

<a href="javascript:void(0)" onClick={foo}>Perform action</a> <a href="#" onClick={foo}>Perform action</a> <a onClick={foo}>Perform action</a> 

All these anchor implementations indicate that the element is only used to execute JavaScript code. All the above should be replaced with:

<button onClick={foo}>Perform action</button> 

Related:

• When should I use a button (<button>) or a link (<a>) in HTML?
• Links vs. Buttons in Modern Web Applications

If you are using React Router, I'd suggest looking into the react-router-bootstrap library which has a handy component LinkContainer. This component prevents default page reload so you don't have to deal with the event.

In your case it could look something like:

import { LinkContainer } from 'react-router-bootstrap'; <LinkContainer to={givePathHere}> <span className="upvotes" onClick={this.upvote}>upvote</span> </LinkContainer> 

I've had some troubles with anchor tags and preventDefault in the past and I always forget what I'm doing wrong, so here's what I figured out.

The problem I often have is that I try to access the component's attributes by destructuring them directly as with other React components. This will not work, the page will reload, even with e.preventDefault():

function (e, { href }) { e.preventDefault(); // Do something with href } ... <a href="/foobar" onClick={clickHndl}>Go to Foobar</a> 

It seems the destructuring causes an error (Cannot read property 'href' of undefined) that is not displayed to the console, probably due to the page complete reload. Since the function is in error, the preventDefault doesn't get called. If the href is #, the error is displayed properly since there's no actual reload.

I understand now that I can only access attributes as a second handler argument on custom React components, not on native HTML tags. So of course, to access an HTML tag attribute in an event, this would be the way:

function (e) { e.preventDefault(); const { href } = e.target; // Do something with href } ... <a href="/foobar" onClick={clickHndl}>Go to Foobar</a> 

I hope this helps other people like me puzzled by not shown errors!

just like pure js do preventdefault : in class you should like this create a handler method :

handler(event) { event.preventDefault(); console.log(event); } 

function ActionLink() { const handleClick = (e) => { e.preventDefault(); console.log('The link was clicked.'); } return ( <a href="#" onClick={handleClick}> Click me </a> ); } 

Call e.preventDefault() + make sure the callback function is arrow function.

If you use checkbox

<input type='checkbox' onChange={this.checkboxHandler} /> 

stopPropagation and stopImmediatePropagation won't be working.

Because you must using onClick={this.checkboxHandler}

You should pass the event object when you call the method. e.g

const handleOnSubmit = (e) => { console.log("in submit"); e.preventDefault(); }; 

you should call this like

<form onSubmit={(e) => handleOnSubmit(e)}> 

where you should pass e as the event object