@patternfly/react-core
Version:
This library provides a set of common React components for use with the PatternFly reference implementation.
61 lines • 2.78 kB
JavaScript
import { __rest } from "tslib";
import { jsx as _jsx } from "react/jsx-runtime";
import { forwardRef, useEffect, useState } from 'react';
import styles from '@patternfly/react-styles/css/components/BackToTop/back-to-top.mjs';
import { css } from '@patternfly/react-styles';
import AngleUpIcon from '@patternfly/react-icons/dist/esm/icons/angle-up-icon';
import { canUseDOM } from '../../helpers/util';
import { Button } from '../Button';
const BackToTopBase = (_a) => {
var { className, title = 'Back to top', innerRef, scrollableSelector, isAlwaysVisible = false } = _a, props = __rest(_a, ["className", "title", "innerRef", "scrollableSelector", "isAlwaysVisible"]);
const [visible, setVisible] = useState(isAlwaysVisible);
useEffect(() => {
setVisible(isAlwaysVisible);
}, [isAlwaysVisible]);
const [scrollElement, setScrollElement] = useState(null);
const toggleVisible = () => {
if (scrollElement) {
const scrolled = scrollElement.scrollY ? scrollElement.scrollY : scrollElement.scrollTop;
if (!isAlwaysVisible) {
if (scrolled > 400) {
setVisible(true);
}
else {
setVisible(false);
}
}
}
};
useEffect(() => {
const hasScrollSpy = Boolean(scrollableSelector);
if (hasScrollSpy) {
const scrollEl = document.querySelector(scrollableSelector);
if (!canUseDOM || !(scrollEl instanceof HTMLElement)) {
return;
}
setScrollElement(scrollEl);
scrollEl.addEventListener('scroll', toggleVisible);
return () => {
scrollEl.removeEventListener('scroll', toggleVisible);
};
}
else {
if (!canUseDOM) {
return;
}
const scrollEl = window;
setScrollElement(scrollEl);
scrollEl.addEventListener('scroll', toggleVisible);
return () => {
scrollEl.removeEventListener('scroll', toggleVisible);
};
}
}, [scrollableSelector, toggleVisible]);
const handleClick = () => {
scrollElement.scrollTo({ top: 0, behavior: 'smooth' });
};
return (_jsx("div", Object.assign({ className: css(styles.backToTop, !visible && styles.modifiers.hidden, className), ref: innerRef, onClick: handleClick }, props, { children: _jsx(Button, { variant: "primary", icon: _jsx(AngleUpIcon, {}), iconPosition: "end", children: title }) })));
};
export const BackToTop = forwardRef((props, ref) => (_jsx(BackToTopBase, Object.assign({ innerRef: ref }, props))));
BackToTop.displayName = 'BackToTop';
//# sourceMappingURL=BackToTop.js.map