ChatGPT解决这个技术问题 Extra ChatGPT

How to scroll to an element?

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>)
  }

B
Ben Carp

React 16.8 +, Functional component

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 StackBlits

React 16.3 +, Class component

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 component - Ref callback

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. 
}

Don't use String refs.

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]

resource1resource2

Optional: Smoothe scroll animation

/* css */
html {
    scroll-behavior: smooth;
}

Passing ref to a child

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} />
}

window.scrollTo(0, offsetTop) is a better option with better support among current browsers
Could make sure you are consistent in your exemple. We're starting from myRef, going with domRef, and ending with tesNode ?. That is quite confusing
Obvious after the fact, but it is important to mention that this only works for native DOM elements and not just any React component.
@jpunk11 I just updated my answer. The updated answer explains how to scroll to a dom element which is in a child class component.
@SimonFranzen Take a look at my updated answer - TLDR - class component case. When scrollToMyRef is called it will scroll to the child you attached the ref to. You can pass the method to a different child component, and trigger it from there.
l
lwdthe1

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>

where to put this
in lifecycle method or constructor
Works like a charm. None of the above doesn't work for me, this should be accepted answer!
Worked for me, just note that 'start' is the default value of the 'block' parameter.
This worked for me when @Ben Carp 's answer wouldn't.
R
Roman Maksimov

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>)
}

This is the better answer. Using ReactDOM.findDomNode() is better practice - since React re-renders components, a div that you simply get by its ID might not exist by the time you call the function
According to the official documentation you should try to avoid using findDOMNode. In most cases, you can attach a ref to the DOM node and avoid using findDOMNode at all.
Note that using this.refs by string mapping is deprecated, see: stackoverflow.com/questions/43873511/…
Note: I had to use this.myRef.current.scrollIntoView() instead of window.scrollTo(0, this.myRef).
J
Jose

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' } );
};

I needed to scroll from a click in component A to an element in component B. This worked perfectly!
Thanks. After testing other solutions only this works as i expected.
Simple and Straightforward solution and works perfectly. Good Job!
T
Tanapruk Tangphianphan

You can now use useRef from react hook API

https://reactjs.org/docs/hooks-reference.html#useref

declaration

let myRef = useRef()

component

<div ref={myRef}>My Component</div>

Use

window.scrollTo({ behavior: 'smooth', top: myRef.current.offsetTop })

I'm trying to use your code. I can see, through console.log that it's executing your window.scrollTo statement (adjusted for my case) but yet it doesn't scroll. Might this be related to the fact that I'm using a React Bootstrap Modal?
B
Ben Carp

Jul 2019 - Dedicated hook/function

A dedicated hook/function can hide implementation details, and provides a simple API to your components.

React 16.8 + Functional Component

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> 
}

full demo

React 16.3 + class Component

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> 
  }
} 

Full demo


For anyone using Typescript, you should declare the return type of useScroll as [() => void, RefObject<HTMLInputElement>] . Then you can call executeScroll() without issues
@kasztof, I a TS fan, but I heard a strong opinion that TS should not be used in JS SOF questions, as it can make it more difficult to understand to non TS developers. I know the issue you are facing. You can also cast the return as const. We can add TS defintions in a comment, or at the end of the answer.
A
Afaq Ahmed Khan

Using findDOMNode is going to be deprecated eventually.

The preferred method is to use callback refs.

github eslint


Please include the relevant part of the linked material so in case that gets removed your answer doesn't become useless.
r
robinvdvleuten

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.


This is way better. I was originally doing (ref) => window.scrollTo(0, ref.current.offsetTop) but then only getting a small offset from the top and not arriving at target. I believe this was because the ref's location was someone calculated in the beginning and then not updated. Your suggestion fixed my problem while the accepted answer didn't.
F
Farshad J

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>)
}

A
Afaq Ahmed Khan

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


p
p-a-o-l-o

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>
 )}

Good solution, although you probably want e.offsetTop rather than this.gate.offsetTop and then pass this.gate to the function.
u
user3349907

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>

R
Raviteja

You can use something like componentDidUpdate

componentDidUpdate() {
  var elem = testNode //your ref to the element say testNode in your case; 
  elem.scrollTop = elem.scrollHeight;
};

i think using element id is not preferred in react. It breaks the virtual dom concept
Using the life cycle method is the way to go as far as WHEN/WHERE to run the code. But probably want to use the other methodologies you see in this answer for the actual code
b
bello hargbola

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>
    )
  }
}

M
Mario Petrovic

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];
};

Your answer could probably benefit from a link, a definition for ScrollIntoViewOptions, and an example usage.
A
Azametzin

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>
    )
  }
}

This library react-scroll-to is quite useful when multiple components are present or ref passing is complex.
S
Suneth Thotagamuwa

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
});

Here I guess your page has fixed number of elements because you have hardcoded the value of 'offset'. How will you solve the scrolling if the elements in your page are dynamically rendered basis the dynamic response from say an API.
J
Jan Schultke

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" })

}

Neat! This works with scrolling to nested elements even when you are triggering the scroll from a parent.
S
Senthuran

In order to automatically scroll into the particular element, first need to select the element using document.getElementById and then we need to scroll using scrollIntoView(). Please refer the below code.

   scrollToElement= async ()=>{
      document.getElementById('id001').scrollIntoView();
    } 

The above approach worked for me.


B
Bruno Pintos

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>
      </>
   )
}

D
DINA TAKLIT

You can use useRef along with scrollIntoView.

use useReffor 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 elemnt

You 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>
...

Create a function that handle this sroll:

  const handleSeeCompleteList = () => {
    const tabs = tabsRef.current
    if (tabs) {
      tabs.scrollIntoView({
        behavior: 'smooth',
        block: 'start',
      })
    }
  }

Call this function on the element you want once you click to scroll to the target:

 <Typography
  variant="body2"
  sx={{
    color: "#007BFF",
    cursor: "pointer",
    fontWeight: 500,
  }}
  onClick={(e) => {
    handleChange(e, 2);
    handleSeeCompleteList(); // here we go
  }}
>
  Voir toute la liste
</Typography>;

https://i.stack.imgur.com/OrjAh.gif


R
Robert O'Toole
<div id="componentToScrollTo"><div>

<a href='#componentToScrollTo'>click me to scroll to this</a>

This is all you need.


A
Artur Barseghyan

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>
        )
    }
}

S
Steve

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.


U
User59

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!


H
Halil Şağan

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>

c
colining

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.


i
ibamboo
 <div onScrollCapture={() => this._onScrollEvent()}></div>

 _onScrollEvent = (e)=>{
     const top = e.nativeEvent.target.scrollTop;
     console.log(top); 
}

S
Scott Lexium

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>