React16 UI ScrollSpy

! A modified version of react ui scrollspy which is compatible with react 16 !

Make sure you ⭐️ this repository if you find it helpful or interesting :)

✨ Installation

React 18

npm install --save react-ui-scrollspy

OR

yarn add react-ui-scrollspy

React 17

npm install --save [email protected]

OR

yarn add [email protected]

React 16

npm install --save xlfpx/react16-ui-scrollspy#main

🎞 Demo

Try it your self here!

| Demo 1 | Demo 2 | | :-------------------------------------------- | :--------------------------------------------- | | | |

⚙️ Usage

1. In your navigation component

<div>
  <p data-to-scrollspy-id="first">Section 1</p>
  <p data-to-scrollspy-id="second">Section 2</p>
</div>

2. Wrap the elements you want to spy on in the <ScrollSpy> component.

import ScrollSpy from "react-ui-scrollspy";

<ScrollSpy>
  <div id="first">
    Lorem ipsum dolor sit amet consectetur adipisicing elit. Aut dolores
    veritatis doloremque fugit. Soluta aperiam atque inventore deleniti,
    voluptatibus non fuga eos magni natus vel, rerum excepturi expedita.
    Tempore, vero!
  </div>
  <div id="second">
    Lorem ipsum dolor sit amet consectetur adipisicing elit. Aut dolores
    veritatis doloremque fugit. Soluta aperiam atque inventore deleniti,
    voluptatibus non fuga eos magni natus vel, rerum excepturi expedita.
    Tempore, vero!
  </div>
</ScrollSpy>

3. Write styles for when the navigation element which is active in your index.css

.active-scroll-spy {
  background-color: yellowgreen;
  border-radius: 15px;
}

📝 Notes

Incase the ScrollSpy is not working the way you expected, you can try the following:

• Reduce the value of scrollThrottle.

• If your page contains a navbar a header consider adding the following CSS

html {
  scroll-padding-top: 120px; /* height of your navbar */
}

• Try using offsets.

• Go through the Props.

• See demo-app for example used here.

💡 Props

🔧 Children

| Attributes | Type | Description | Default | Required | | :--------- | :---------- | :------------------------------------------------- | :------ | :------- | | children | ReactNode | Each direct child Element should contain an id | - | yes |

🔧 Refs

| Attributes | Type | Description | Default | Required | | :------------------------- | :------------------------------------------------ | :------------------------------------------------------------------------------------------------------ | :------ | :------- | | navContainerRef | MutableRefObject<HTMLDivElement | null> | ref to your navigation container containing items with data-to-scrollspy-id attributes | - | no | | parentScrollContainerRef | MutableRefObject<HTMLDivElement | null> | If you want to spy only on a particular scrollable container (Element) then pass its ref to this prop | - | no |

🔧 Throttle

| Attributes | Type | Description | Default | Required | | :--------------- | :------- | :-------------------------------------------------------------------------------------------------------------------------- | :------ | :------- | | scrollThrottle | number | In milliseconds to throttle the onscroll event. Lower the number, better the response time, higher the performance cost | 300 | no |

🔧 Callback

| Attributes | Type | Description | Default | Required | | :----------------- | :--------------------- | :--------------------------------------------------------------------------------------------------------------------------------- | :------ | :------- | | onUpdateCallback | (id: string) => void | Executes this function whenever you scroll to a new ScrollSpy child Element, callback returns the id of that Element as well | - | no |

🔧 Offsets

| Attributes | Type | Description | Default | Required | | :------------- | :------- | :-------------------------------------------------------------------------------------------------------------- | :------ | :------- | | offsetTop | number | Spy will be fired when it has been scrolled offsetTop beyond 50% to the top of the containing element | 0 | no | | offsetBottom | number | Spy will be fired when it has been scrolled offsetBottom beyond 50% to the bottom of the containing element | 0 | no |

🔧 Customize Attributes

| Attributes | Type | Description | Default | Required | | :----------------- | :-------- | :-------------------------------------------------------------------------------------------------------- | :-------------------- | :------- | | useDataAttribute | string | To customize the string after data- | "to-scrollspy-id" | no | | activeClass | string | To customize the class added when the Element in view | "active-scroll-spy" | no | | useBoxMethod | boolean | Set to false if you want your spy to be active only if more than 50% of that div is in the viewport | true | no | | updateHistoryStack | boolean | Set to false to disable the URL getting automatically updated when scrolling | true | no

📝 Authors

• Hussain Pettiwala (@pettiboy)
• Lars Frölich (adaptation for React16)