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Fine-tuning rootMargin prop

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Signed-off-by: Alex Andreev <alex.andreev.email@gmail.com>
This commit is contained in:
Alex Andreev 2021-03-11 10:43:12 +03:00
parent 85bcdcc2c7
commit c11b272cba
2 changed files with 10 additions and 2 deletions
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3
src/renderer/components/+preferences/preferences.tsx
View File

@ -30,9 +30,10 @@ export class Preferences extends React.Component {
render() {
const { preferences } = userStore;
const header = <h2>Preferences</h2>;
const rootMargin = "80px 0px -85%"; // Cut header size from the top and 85% from the bottom of viewport
return (
<ScrollSpy render={navigation => (
<ScrollSpy rootMargin={rootMargin} render={navigation => (
<PageLayout
showOnTop
navigation={navigation}

9
src/renderer/components/scroll-spy/scroll-spy.tsx
View File

@ -4,6 +4,7 @@ import { NavigationTree } from "../tree-view";
interface Props extends React.DOMAttributes<HTMLElement> {
render: (data: NavigationTree[]) => JSX.Element
rootMargin?: string // https://developer.mozilla.org/en-US/docs/Web/API/Intersection_Observer_API#creating_an_intersection_observer
}
export function ScrollSpy(props: Props) {
@ -66,7 +67,7 @@ export function ScrollSpy(props: Props) {
// Shrinking root area from the bottom
// Allows to fire observer event only if target scrolled up to top of the page)
// https://developer.mozilla.org/en-US/docs/Web/API/Intersection_Observer_API#creating_an_intersection_observer
rootMargin: "0px 0px -85%",
rootMargin: props.rootMargin,
};
sections.current.forEach((section) => {
@ -94,3 +95,9 @@ export function ScrollSpy(props: Props) {
</div>
);
}
ScrollSpy.defaultProps = {
// Shrinking root area from the bottom
// Allows to fire observer event only if target scrolled up to top of the page)
rootMargin: "0px 0px -85%"
};