Weird coverage highlighting with istanbul-instrumenter-loader and Webpack
Hello all,
I may not be the only one to have wasted hours trying to figure out why the coverage report looked like this:
The reason was subtle:
Archive for April, 2017
Detect scroll direction on React
Hello all,
A quick snippet that can prove to be useful:
<div onWheel={ event => {
if (event.nativeEvent.wheelDelta > 0) {
console.log('scroll up');
} else {
console.log('scroll down');
}
}}
>
scroll on me!
</div>
onWheel synthetic event returns an event object having an attribute named nativeEvent containing the original event information. wheelDelta is used to detect the direction even if there is no effective scroll (overflow:hidden).
