react-minscroll

Installation

yarn add @xailabs/react-minscroll

npm install --save @xailabs/react-minscroll

What is it?

A react wrapper component that only renders its children if the window is scrolled below a certain point.

That certain point may be one of these types:

• number - amount of pixels
• string - A css selector query that retrieves an Element
• Element - reference to a DOM node.
• function - A function that returns any of the previously mentioned types

You specify it using the minScroll prop. If minScroll resolves to an element, it's bottom position will be used (offsetTop + offsetHeight). If you have dynamic heights, maybe in responsive environments, use functions that measure and return the current values.

Example:

import React, {Component} from 'react';
import MinScroll from '@xailabs-minscroll';
export default class MyComponent {
    render() {
        return (
            <MinScroll minScroll={500}>
                I will only be visible when the window was scrolled 500 pixels!
            </MinScroll>
        );
    }
}

Other props

• offset - Will be added to minScroll
• offsetNegative - Will be subtracted from minScroll

Both these props take the same types as minScroll (described above).

You might wonder why have a offsetNegative if you can just use offset={-50}. The reason for this is that you can only specify a negative number if the value actually is a number.
Using offsetNegative you can specify a selector or use an Element reference and have its bottom subtracted from minScroll.

You can also combine the two, using offset for smaller corrections:

<MinScroll
    minScroll={'.AppHeader > div > .progress-container .ProgressBar'}
    offsetNegative={'.AppHeader .StickyHeader'}
    offset={-3}
    children={...}
/>