mirror of
https://github.com/ant-design/ant-design.git
synced 2024-12-15 17:19:11 +08:00
8501adbd84
* fix: add displayName * rerun ci * rerun ci
90 lines
2.9 KiB
TypeScript
90 lines
2.9 KiB
TypeScript
import VerticalAlignTopOutlined from '@ant-design/icons/VerticalAlignTopOutlined';
|
|
import classNames from 'classnames';
|
|
import CSSMotion from 'rc-motion';
|
|
import React, { memo, useContext, useEffect, useRef, useState } from 'react';
|
|
import FloatButton, { floatButtonPrefixCls } from './FloatButton';
|
|
import type { ConfigConsumerProps } from '../config-provider';
|
|
import { ConfigContext } from '../config-provider';
|
|
import getScroll from '../_util/getScroll';
|
|
import scrollTo from '../_util/scrollTo';
|
|
import throttleByAnimationFrame from '../_util/throttleByAnimationFrame';
|
|
import FloatButtonGroupContext from './context';
|
|
import type { BackTopProps, FloatButtonProps, FloatButtonShape } from './interface';
|
|
import useStyle from './style';
|
|
|
|
const BackTop: React.FC<BackTopProps> = (props) => {
|
|
const {
|
|
prefixCls: customizePrefixCls,
|
|
className = '',
|
|
type = 'default',
|
|
shape = 'circle',
|
|
visibilityHeight = 400,
|
|
icon = <VerticalAlignTopOutlined />,
|
|
target,
|
|
onClick,
|
|
duration = 450,
|
|
...restProps
|
|
} = props;
|
|
|
|
const [visible, setVisible] = useState<boolean>(visibilityHeight === 0);
|
|
|
|
const ref = useRef<HTMLAnchorElement | HTMLButtonElement>(null);
|
|
|
|
const getDefaultTarget = (): HTMLElement | Document | Window =>
|
|
ref.current && ref.current.ownerDocument ? ref.current.ownerDocument : window;
|
|
|
|
const handleScroll = throttleByAnimationFrame(
|
|
(e: React.UIEvent<HTMLElement, UIEvent> | { target: any }) => {
|
|
const scrollTop = getScroll(e.target, true);
|
|
setVisible(scrollTop >= visibilityHeight);
|
|
},
|
|
);
|
|
|
|
useEffect(() => {
|
|
const getTarget = target || getDefaultTarget;
|
|
const container = getTarget();
|
|
handleScroll({ target: container });
|
|
container?.addEventListener('scroll', handleScroll);
|
|
return () => {
|
|
handleScroll.cancel();
|
|
container?.removeEventListener('scroll', handleScroll);
|
|
};
|
|
}, [target]);
|
|
|
|
const scrollToTop: React.MouseEventHandler<HTMLDivElement> = (e) => {
|
|
scrollTo(0, { getContainer: target || getDefaultTarget, duration });
|
|
onClick?.(e);
|
|
};
|
|
|
|
const { getPrefixCls } = useContext<ConfigConsumerProps>(ConfigContext);
|
|
|
|
const prefixCls = getPrefixCls(floatButtonPrefixCls, customizePrefixCls);
|
|
const rootPrefixCls = getPrefixCls();
|
|
const [wrapSSR] = useStyle(prefixCls);
|
|
|
|
const groupShape = useContext<FloatButtonShape | undefined>(FloatButtonGroupContext);
|
|
|
|
const mergeShape = groupShape || shape;
|
|
|
|
const contentProps: FloatButtonProps = { prefixCls, icon, type, shape: mergeShape, ...restProps };
|
|
|
|
return wrapSSR(
|
|
<CSSMotion visible={visible} motionName={`${rootPrefixCls}-fade`}>
|
|
{({ className: motionClassName }) => (
|
|
<FloatButton
|
|
ref={ref}
|
|
{...contentProps}
|
|
onClick={scrollToTop}
|
|
className={classNames(className, motionClassName)}
|
|
/>
|
|
)}
|
|
</CSSMotion>,
|
|
);
|
|
};
|
|
|
|
if (process.env.NODE_ENV !== 'production') {
|
|
BackTop.displayName = 'BackTop';
|
|
}
|
|
|
|
export default memo(BackTop);
|