Reputation: 8155
I have a chat widget that pulls up an array of messages every time I scroll up. The problem I am facing now is the slider stays fixed at the top when messages load. I want it to focus on the last index element from the previous array. I figured out that I can make dynamic refs by passing index, but I would also need to know what kind of scroll function to use to achieve that
handleScrollToElement(event) {
const tesNode = ReactDOM.findDOMNode(this.refs.test)
if (some_logic){
//scroll to testNode
}
}
render() {
return (
<div>
<div ref="test"></div>
</div>)
}
Upvotes: 467
Views: 919487
Reputation: 1635
Just find the top position of the element you've already determined https://www.w3schools.com/Jsref/prop_element_offsettop.asp then scroll to this position via scrollTo
method https://www.w3schools.com/Jsref/met_win_scrollto.asp
Something like this should work:
handleScrollToElement(event) {
const tesNode = ReactDOM.findDOMNode(this.refs.test)
if (some_logic){
window.scrollTo(0, tesNode.offsetTop);
}
}
render() {
return (
<div>
<div ref="test"></div>
</div>)
}
UPDATE:
since React v16.3 the React.createRef()
is preferred
constructor(props) {
super(props);
this.myRef = React.createRef();
}
handleScrollToElement(event) {
if (<some_logic>){
window.scrollTo(0, this.myRef.current.offsetTop);
}
}
render() {
return (
<div>
<div ref={this.myRef}></div>
</div>
)
}
UPDATE 2:
since React v16.8 you can use the useRef()
hook
const MyComponent = () => {
const myRef = useRef(null);
handleScrollToElement = useCallback((event) => {
if (<some_logic>){
window.scrollTo(0, myRef.current.offsetTop);
}
}, []);
return (
<div>
<div ref={myRef}></div>
</div>
);
}
Alternative
Instead of window.scrollTo()
you can also use myRef.current.scrollIntoView()
(see scrollIntoView documentation)
Upvotes: 51
Reputation: 469
How to scroll to certain element in Reactjs during page render
import React, { useEffect, useRef } from 'react'
const YourComponent = () => {
const yourElementRef = useRef(null);
useEffect(() => {
if (yourElementRef.current) {
yourElementRef.current.scrollIntoView({ behavior: 'smooth' });
}
}, []);
return (
<div ref={yourElementRef}>Element to scroll to</div>
);
}
How to scroll to certain element in Reactjs when a state changes
import React, { useEffect, useRef, useState } from 'react'
const YourComponent = () => {
const [stateValue, setStateValue] = useState()
const yourElementRef = useRef(null);
useEffect(() => {
if (yourElementRef.current) {
yourElementRef.current.scrollIntoView({ behavior: 'smooth' });
}
}, [stateValue]);
return (
<div ref={yourElementRef}>Element to scroll to</div>
);
}
Upvotes: 7
Reputation: 26518
const ScrollDemo = () => {
const myRef = useRef(null)
const executeScroll = () => myRef.current.scrollIntoView()
// run this function from an event handler or an effect to execute scroll
return (
<>
<div ref={myRef}>Element to scroll to</div>
<button onClick={executeScroll}> Click to scroll </button>
</>
)
}
Click here for a full demo on StackBlitz
class ReadyToScroll extends Component {
constructor(props) {
super(props)
this.myRef = React.createRef()
}
render() {
return <div ref={this.myRef}>Element to scroll to</div>
}
executeScroll = () => this.myRef.current.scrollIntoView()
// run this method to execute scrolling.
}
class ReadyToScroll extends Component {
render() {
return <div ref={ (ref) => this.myRef=ref }>Element to scroll to</div>
}
executeScroll = () => this.myRef.scrollIntoView()
// run this method to execute scrolling.
}
String refs harm performance, aren't composable, and are on their way out (Aug 2018).
string refs have some issues, are considered legacy, and are likely to be removed in one of the future releases. [Official React documentation]
/* css */
html {
scroll-behavior: smooth;
}
We want the ref to be attached to a dom element, not to a react component. So when passing it to a child component we can't name the prop ref.
const MyComponent = () => {
const myRef = useRef(null)
return <ChildComp refProp={myRef}></ChildComp>
}
Then attach the ref prop to a dom element.
const ChildComp = (props) => {
return <div ref={props.refProp} />
}
Upvotes: 818
Reputation: 427
<div id="componentToScrollTo"><div>
<a href='#componentToScrollTo'>click me to scroll to this</a>
Upvotes: 11
Reputation: 2289
I had a simple scenario, When user clicks on the menu item in my Material UI Navbar I want to scroll them down to the section on the page. I could use refs and thread them through all the components but I hate threading props through multiple components because that makes code fragile.
I just used vanilla JS in my react component, turns out it works just fine. Placed an ID on the element I wanted to scroll to and in my header component I just did this.
const scroll = () => {
const section = document.querySelector( '#contact-us' );
section.scrollIntoView( { behavior: 'smooth', block: 'start' } );
};
Upvotes: 80
Reputation: 8388
You can use useRef
along with scrollIntoView
.
useRef
for the element you want to scroll to: here I want to sroll to the PieceTabs element that is why I wrap it with a Box(div) so I can get access to the dom elemntYou might be familiar with refs primarily as a way to access the DOM. If you pass a ref object to React with , React will set its .current property to the corresponding DOM node whenever that node changes. See the doc
...
const tabsRef = useRef()
...
<Box ref={tabsRef}>
<PieceTabs piece={piece} value={value} handleChange={handleChange} />
</Box>
...
const handleSeeCompleteList = () => {
const tabs = tabsRef.current
if (tabs) {
tabs.scrollIntoView({
behavior: 'smooth',
block: 'start',
})
}
}
<Typography
variant="body2"
sx={{
color: "#007BFF",
cursor: "pointer",
fontWeight: 500,
}}
onClick={(e) => {
handleChange(e, 2);
handleSeeCompleteList(); // here we go
}}
>
Voir toute la liste
</Typography>;
Upvotes: 5
Reputation: 11
Maybe someone meets situation like me
https://reactjs.org/docs/hooks-faq.html#how-can-i-measure-a-dom-node
How can I measure a DOM node? One rudimentary way to measure the position or size of a DOM node is to use a callback ref. React will call that callback whenever the ref gets attached to a different node. Here is a small demo:
function MeasureExample() {
const [height, setHeight] = useState(0);
const measuredRef = useCallback(node => {
if (node !== null) {
setHeight(node.getBoundingClientRect().height);// you can scroll in this line
}
}, []);
return (
<>
<h1 ref={measuredRef}>Hello, world</h1>
<h2>The above header is {Math.round(height)}px tall</h2>
</>
);
}
We didn’t choose useRef in this example because an object ref doesn’t notify us about changes to the current ref value. Using a callback ref ensures that even if a child component displays the measured node later (e.g. in response to a click), we still get notified about it in the parent component and can update the measurements.
Note that we pass [] as a dependency array to useCallback. This ensures that our ref callback doesn’t change between the re-renders, and so React won’t call it unnecessarily.
In this example, the callback ref will be called only when the component mounts and unmounts, since the rendered component stays present throughout any rerenders. If you want to be notified any time a component resizes, you may want to use ResizeObserver or a third-party Hook built on it.
Upvotes: 1
Reputation: 61
This is the easiest way I find working for me. Just use normal javascript syntax no need for much packages
const scrollTohowItWorks = () => window.scroll({
top: 2000,
left: 0,
behavior: 'smooth'
});
<NavLink onClick={scrollTohowItWorks} style={({ isActive }) => isActive? {color: '#e26702', fontWeight:'bold'}: { color: '#0651b3'}} to=''>Support</NavLink>
Upvotes: 0
Reputation: 860
If anyone is using Typescript, here is Ben Carp's answer for it:
import { RefObject, useRef } from 'react';
export const useScroll = <T extends HTMLElement>(
options?: boolean | ScrollIntoViewOptions
): [() => void, RefObject<T>] => {
const elRef = useRef<T>(null);
const executeScroll = (): void => {
if (elRef.current) {
elRef.current.scrollIntoView(options);
}
};
return [executeScroll, elRef];
};
Upvotes: 5
Reputation: 2209
this worked for me
this.anyRef.current.scrollIntoView({ behavior: 'smooth', block: 'start' })
EDIT: I wanted to expand on this based on the comments.
const scrollTo = (ref) => {
if (ref && ref.current /* + other conditions */) {
ref.current.scrollIntoView({ behavior: 'smooth', block: 'start' })
}
}
<div ref={scrollTo}>Item</div>
Upvotes: 150
Reputation: 357
This solution works for me in ReactJS
In header.js
function scrollToTestDiv(){
const divElement = document.getElementById('test');
divElement.scrollIntoView({ behavior: 'smooth' });
}
<a class="nav-link" onClick={scrollToTestDiv}> Click here! </a>
In index.html
<div id="test"></div>
Upvotes: 9
Reputation: 26518
A dedicated hook/function can hide implementation details, and provides a simple API to your components.
const useScroll = () => {
const elRef = useRef(null);
const executeScroll = () => elRef.current.scrollIntoView();
return [executeScroll, elRef];
};
Use it in any functional component.
const ScrollDemo = () => {
const [executeScroll, elRef] = useScroll()
useEffect(executeScroll, []) // Runs after component mounts
return <div ref={elRef}>Element to scroll to</div>
}
const utilizeScroll = () => {
const elRef = React.createRef();
const executeScroll = () => elRef.current.scrollIntoView();
return { executeScroll, elRef };
};
Use it in any class component.
class ScrollDemo extends Component {
constructor(props) {
super(props);
this.elScroll = utilizeScroll();
}
componentDidMount() {
this.elScroll.executeScroll();
}
render(){
return <div ref={this.elScroll.elRef}>Element to scroll to</div>
}
}
Upvotes: 21
Reputation: 61
After reading through manny forums found a really easy solution.
I use redux-form. Urgo mapped redux-from fieldToClass. Upon error I navigate to the first error on the list of syncErrors.
No refs and no third party modules. Just simple querySelector
& scrollIntoView
handleToScroll = (field) => {
const fieldToClass = {
'vehicleIdentifier': 'VehicleIdentifier',
'locationTags': 'LocationTags',
'photos': 'dropzoneContainer',
'description': 'DescriptionInput',
'clientId': 'clientId',
'driverLanguage': 'driverLanguage',
'deliveryName': 'deliveryName',
'deliveryPhone': 'deliveryPhone',
"deliveryEmail": 'deliveryEmail',
"pickupAndReturn": "PickupAndReturn",
"payInCash": "payInCash",
}
document?.querySelector(`.${fieldToClasses[field]}`)
.scrollIntoView({ behavior: "smooth" })
}
Upvotes: 4
Reputation: 139
Here is my solution:
I put an invisible div inside main div and made its position absolute. Then set the top value to -(header height) and set the ref on this div. Or you can just react that div with children method.
It's working great so far!
<div className="position-relative">
<div style={{position:"absolute", top:"-80px", opacity:0, pointerEvents:'none'}} ref={ref}></div>
Upvotes: 1
Reputation: 481
If you want to do it on page load you can use useLayoutEffect, and useRef.
import React, { useRef, useLayoutEffect } from 'react'
const ScrollDemo = () => {
const myRef = useRef(null)
useLayoutEffect(() => {
window.scrollTo({
behavior: "smooth",
top: myRef.current.offsetTop,
});
}, [myRef.current]);
return (
<>
<div ref={myRef}>I wanna be seen</div>
</>
)
}
Upvotes: 3
Reputation: 1514
The nicest way is to use element.scrollIntoView({ behavior: 'smooth' })
. This scrolls the element into view with a nice animation.
When you combine it with React's useRef()
, it can be done the following way.
import React, { useRef } from 'react'
const Article = () => {
const titleRef = useRef()
function handleBackClick() {
titleRef.current.scrollIntoView({ behavior: 'smooth' })
}
return (
<article>
<h1 ref={titleRef}>
A React article for Latin readers
</h1>
// Rest of the article's content...
<button onClick={handleBackClick}>
Back to the top
</button>
</article>
)
}
When you would like to scroll to a React component, you need to forward the ref to the rendered element. This article will dive deeper into the problem.
Upvotes: 11
Reputation: 81
I used this inside a onclick function to scroll smoothly to a div where its id is "step2Div".
let offset = 100;
window.scrollTo({
behavior: "smooth",
top:
document.getElementById("step2Div").getBoundingClientRect().top -
document.body.getBoundingClientRect().top -
offset
});
Upvotes: 4
Reputation: 517
To anyone else reading this who didn't have much luck with the above solutions or just wants a simple drop-in solution, this package worked for me: https://www.npmjs.com/package/react-anchor-link-smooth-scroll. Happy Hacking!
Upvotes: 2
Reputation: 474
Here is the Class Component code snippet you can use to solve this problem:
This approach used the ref and also scrolls smoothly to the target ref
import React, { Component } from 'react'
export default class Untitled extends Component {
constructor(props) {
super(props)
this.howItWorks = React.createRef()
}
scrollTohowItWorks = () => window.scroll({
top: this.howItWorks.current.offsetTop,
left: 0,
behavior: 'smooth'
});
render() {
return (
<div>
<button onClick={() => this.scrollTohowItWorks()}>How it works</button>
<hr/>
<div className="content" ref={this.howItWorks}>
Lorem ipsum dolor, sit amet consectetur adipisicing elit. Nesciunt placeat magnam accusantium aliquid tenetur aspernatur nobis molestias quam. Magnam libero expedita aspernatur commodi quam provident obcaecati ratione asperiores, exercitationem voluptatum!
</div>
</div>
)
}
}
Upvotes: 5
Reputation: 4975
Just a heads up, I couldn't get these solutions to work on Material UI components. Looks like they don't have the current
property.
I just added an empty div
amongst my components and set the ref prop on that.
Upvotes: 1
Reputation: 81
Follow these steps:
1) Install:
npm install react-scroll-to --save
2) Import the package:
import { ScrollTo } from "react-scroll-to";
3) Usage:
class doc extends Component {
render() {
return(
<ScrollTo>
{({ scroll }) => (
<a onClick={() => scroll({ x: 20, y: 500, , smooth: true })}>Scroll to Bottom</a>
)}
</ScrollTo>
)
}
}
Upvotes: 4
Reputation: 1577
<div onScrollCapture={() => this._onScrollEvent()}></div>
_onScrollEvent = (e)=>{
const top = e.nativeEvent.target.scrollTop;
console.log(top);
}
Upvotes: 0
Reputation: 803
You can now use useRef
from react hook API
https://reactjs.org/docs/hooks-reference.html#useref
let myRef = useRef()
<div ref={myRef}>My Component</div>
window.scrollTo({ behavior: 'smooth', top: myRef.current.offsetTop })
Upvotes: 18
Reputation: 173
I might be late to the party but I was trying to implement dynamic refs to my project the proper way and all the answer I have found until know aren't quiet satisfying to my liking, so I came up with a solution that I think is simple and uses the native and recommended way of react to create the ref.
sometimes you find that the way documentation is wrote assumes that you have a known amount of views and in most cases this number is unknown so you need a way to solve the problem in this case, create dynamic refs to the unknown number of views you need to show in the class
so the most simple solution i could think of and worked flawlessly was to do as follows
class YourClass extends component {
state={
foo:"bar",
dynamicViews:[],
myData:[] //get some data from the web
}
inputRef = React.createRef()
componentDidMount(){
this.createViews()
}
createViews = ()=>{
const trs=[]
for (let i = 1; i < this.state.myData.lenght; i++) {
let ref =`myrefRow ${i}`
this[ref]= React.createRef()
const row = (
<tr ref={this[ref]}>
<td>
`myRow ${i}`
</td>
</tr>
)
trs.push(row)
}
this.setState({dynamicViews:trs})
}
clickHandler = ()=>{
//const scrollToView = this.inputRef.current.value
//That to select the value of the inputbox bt for demostrate the //example
value=`myrefRow ${30}`
this[value].current.scrollIntoView({ behavior: "smooth", block: "start" });
}
render(){
return(
<div style={{display:"flex", flexDirection:"column"}}>
<Button onClick={this.clickHandler}> Search</Button>
<input ref={this.inputRef}/>
<table>
<tbody>
{this.state.dynamicViews}
<tbody>
<table>
</div>
)
}
}
export default YourClass
that way the scroll will go to whatever row you are looking for..
cheers and hope it helps others
Upvotes: 10
Reputation: 1332
Using findDOMNode is going to be deprecated eventually.
The preferred method is to use callback refs.
Upvotes: 14
Reputation: 14162
What worked for me:
class MyComponent extends Component {
constructor(props) {
super(props);
this.myRef = React.createRef(); // Create a ref
}
// Scroll to ref function
scrollToMyRef = () => {
window.scrollTo({
top:this.myRef.offsetTop,
// behavior: "smooth" // optional
});
};
// On component mount, scroll to ref
componentDidMount() {
this.scrollToMyRef();
}
// Render method. Note, that `div` element got `ref`.
render() {
return (
<div ref={this.myRef}>My component</div>
)
}
}
Upvotes: 2
Reputation: 3479
You can use something like componentDidUpdate
componentDidUpdate() {
var elem = testNode //your ref to the element say testNode in your case;
elem.scrollTop = elem.scrollHeight;
};
Upvotes: 5
Reputation: 121
You can also use scrollIntoView
method to scroll to a given element.
handleScrollToElement(event) {
const tesNode = ReactDOM.findDOMNode(this.refs.test)
if (some_logic){
tesNode.scrollIntoView();
}
}
render() {
return (
<div>
<div ref="test"></div>
</div>)
}
Upvotes: 11
Reputation: 163
You could try this way:
handleScrollToElement = e => {
const elementTop = this.gate.offsetTop;
window.scrollTo(0, elementTop);
};
render(){
return(
<h2 ref={elem => (this.gate = elem)}>Payment gate</h2>
)}
Upvotes: 7