ant-design/components/layout/Sider.tsx

import BarsOutlined from '@ant-design/icons/BarsOutlined';
import LeftOutlined from '@ant-design/icons/LeftOutlined';
import RightOutlined from '@ant-design/icons/RightOutlined';
import classNames from 'classnames';
import omit from 'rc-util/lib/omit';
import * as React from 'react';
import { useContext, useEffect, useRef, useState } from 'react';

import isNumeric from '../_util/isNumeric';
import { ConfigContext } from '../config-provider';
import { LayoutContext } from './layout';

const dimensionMaxMap = {
  xs: '479.98px',
  sm: '575.98px',
  md: '767.98px',
  lg: '991.98px',
  xl: '1199.98px',
  xxl: '1599.98px',
};

export interface SiderContextProps {
  siderCollapsed?: boolean;
}

export const SiderContext: React.Context<SiderContextProps> = React.createContext({});

export type CollapseType = 'clickTrigger' | 'responsive';

export type SiderTheme = 'light' | 'dark';

export interface SiderProps extends React.HTMLAttributes<HTMLDivElement> {
  prefixCls?: string;
  collapsible?: boolean;
  collapsed?: boolean;
  defaultCollapsed?: boolean;
  reverseArrow?: boolean;
  onCollapse?: (collapsed: boolean, type: CollapseType) => void;
  zeroWidthTriggerStyle?: React.CSSProperties;
  trigger?: React.ReactNode;
  width?: number | string;
  collapsedWidth?: number | string;
  breakpoint?: 'xs' | 'sm' | 'md' | 'lg' | 'xl' | 'xxl';
  theme?: SiderTheme;
  onBreakpoint?: (broken: boolean) => void;
}

export interface SiderState {
  collapsed?: boolean;
  below: boolean;
}

const generateId = (() => {
  let i = 0;
  return (prefix: string = '') => {
    i += 1;
    return `${prefix}${i}`;
  };
})();

const Sider = React.forwardRef<HTMLDivElement, SiderProps>((props, ref) => {
  const {
    prefixCls: customizePrefixCls,
    className,
    trigger,
    children,
    defaultCollapsed = false,
    theme = 'dark',
    style = {},
    collapsible = false,
    reverseArrow = false,
    width = 200,
    collapsedWidth = 80,
    zeroWidthTriggerStyle,
    breakpoint,
    onCollapse,
    onBreakpoint,
    ...otherProps
  } = props;
  const { siderHook } = useContext(LayoutContext);

  const [collapsed, setCollapsed] = useState(
    'collapsed' in props ? props.collapsed : defaultCollapsed,
  );
  const [below, setBelow] = useState(false);

  useEffect(() => {
    if ('collapsed' in props) {
      setCollapsed(props.collapsed);
    }
  }, [props.collapsed]);

  const handleSetCollapsed = (value: boolean, type: CollapseType) => {
    if (!('collapsed' in props)) {
      setCollapsed(value);
    }
    onCollapse?.(value, type);
  };

  // ========================= Responsive =========================
  const responsiveHandlerRef = useRef<(mql: MediaQueryListEvent | MediaQueryList) => void>();
  responsiveHandlerRef.current = (mql: MediaQueryListEvent | MediaQueryList) => {
    setBelow(mql.matches);
    onBreakpoint?.(mql.matches);

    if (collapsed !== mql.matches) {
      handleSetCollapsed(mql.matches, 'responsive');
    }
  };

  useEffect(() => {
    function responsiveHandler(mql: MediaQueryListEvent | MediaQueryList) {
      return responsiveHandlerRef.current!(mql);
    }