react bootstrap navbar fade out
render(){
const opacity = Math.min(100 / this.state.currentScrollHeight , 1)
return <div style={{opacity}} id='element-you-want-to-fade'> </div>
}componentDidMount () {
window.onscroll =()=>{
const newScrollHeight = Math.ceil(window.scrollY / 50) *50;
if (this.state.currentScrollHeight != newScrollHeight){
this.setState({currentScrollHeight: newScrollHeight})
}
}
}
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