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scroll top in react using ReactDOM
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import React from 'react' | |
import ReactDOM from 'react-dom' | |
import AroundIcons from './AroundIcons' | |
class ResumeComponent extends React.Component { | |
constructor(props) { | |
super(); | |
this.state = { | |
elementOffsetTop: 10000, // setting this to a large number as initial scroll offset | |
wScroll: 0, | |
wInnerHeight: '' | |
} | |
// bindings | |
this.handleScroll = this.handleScroll.bind(this) | |
} | |
componentDidMount() { | |
window.addEventListener('scroll' , this.handleScroll); | |
} | |
componentWillUnmount() { | |
window.removeEventListener('scroll' , this.handleScroll); | |
} | |
handleScroll(e) { | |
// getting elemtn distance from its position to top | |
// let elementOffsetTop = parseInt(ReactDOM.findDOMNode(this).getBoundingClientRect().top); // INSTEAD OF THIS USE BELOW | |
let elementOffsetTop = parseInt(ReactDOM.findDOMNode(this).offsetTop) //.getBoundingClientRect().top); | |
// getting value of how much we scrolled down | |
let wScroll = window.scrollY; | |
let wInnerHeight = window.innerHeight; | |
// setting the values to state of class | |
this.setState({ | |
elementOffsetTop: elementOffsetTop, | |
wScroll: wScroll, | |
wInnerHeight: wInnerHeight | |
}) | |
} | |
render() { | |
const { id, type , company , begin_to_work, end_of_work , decription } = this.props.data | |
const classname = `resume ${type.toLowerCase()}` | |
console.log( type + ' => ' + this.state.elementOffsetTop); | |
console.log( '*****WSCROLL*****' + ' => ' + this.state.wScroll); | |
const { elementOffsetTop , wScroll , wInnerHeight } = this.state | |
// const coloredClass = wScroll > elementOffsetTop * 3.5 ? '-enabled' : ''; // INSTEAD OF THIS USE BELOW | |
const enabled = wScroll > elementOffsetTop - (wInnerHeight / 4)*3 ? '-enabled' : ''; | |
return( | |
<div className={classname}> | |
<div className='header'><span>{company}</span></div> | |
<p>{decription}</p> | |
<div className='duration'><span>{`${begin_to_work} - ${end_of_work}`}</span></div> | |
<AroundIcons type={type} classname={enabled} /> | |
</div> | |
) | |
} | |
} | |
export default ResumeComponent; |
also check this one too https://stackoverflow.com/questions/29725828/update-style-of-a-component-onscroll-in-react-js
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check this answer for more https://stackoverflow.com/questions/32667847/get-divs-offsettop-positions-in-react