[JavaScript知识库]React-View-UI组件库封装——Select选择器

选择器组件，文档如下：



组件封装代码如下：

import React, { FC, useMemo, createRef, useEffect, useState, useCallback, memo } from 'react';
import { DownOutlined, LoadingOutlined, CloseOutlined } from '@ant-design/icons';
import style from './index.module.less';

interface Options {
  label: String | number;
  value: String | number;
  disabled?: Boolean;
}
interface SelectProps {
  /**
   * @description 选择器数据
   * @default []
   */
  option: Array<Options>;
  /**
   * @description 宽度
   * @default 80px
   */
  width?: Number;
  /**
   * @description 提示
   * @default false
   */
  placeholder?: String;
  /**
   * @description 禁用状态
   * @default false
   */
  disabled?: Boolean;
  /**
   * @description 加载状态
   * @default false
   */
  loading?: Boolean;
  /**
   * @description 可输入状态
   * @default false
   */
  showSearch?: Boolean;
  /**
   * @description 可输入状态下清除
   * @default false
   */
  clearable?: Boolean;
  /**
   * @description 选择后的回调
   * @default {}
   */
  handleSelectCallback?: Function;
  /**
   * @description 输入后的回调
   * @default {}
   */
  handleTextChange?: Function;
}

const Select: FC<SelectProps> = (props) => {
  const {
    option,
    width,
    placeholder,
    disabled,
    loading,
    showSearch,
    clearable,
    handleSelectCallback,
    handleTextChange,
  } = props;
  const [selected, setSelected] = useState<string | number | any>('');
  const optionRef = createRef() as any;

  useEffect(() => {
    optionRef.current.style.height = `0px`;
  }, []);

  const ownsWidth = useMemo(() => {
    //传参宽度
    if (width) {
      return {
        width: `${width}px`,
      };
    }
    return {};
  }, [width]);
  const disabledStyle = useMemo(() => {
    //禁用状态
    if (disabled) {
      return {
        cursor: 'not-allowed',
        background: 'rgb(238, 238, 238)',
      };
    }
  }, [disabled]);

  const toggleOptions = (e: any) => {
    //切换下拉
    e.stopPropagation();
    if (disabled) return;
    if (optionRef.current.style.height === '0px') {
      if (showSearch) {
        optionRef.current.style.height = `${inputFilterOtpions.length * 100}%`;
      } else {
        optionRef.current.style.height = `${option.length * 100}%`;
      }
    } else {
      optionRef.current.style.height = '0px';
    }
  };
  const changeOptions = (v: Options, e: any) => {
    //选择选项
    e.stopPropagation();
    if (v.disabled) return;
    optionRef.current.style.height = '0px';
    setSelected(v.label);
    if (handleSelectCallback) {
      handleSelectCallback(v.value);
    }
  };
  const inputFilterOtpions = useMemo(() => {
    //输入状态options过滤
    return option.filter((item) => {
      return (item.label as string).includes(selected);
    });
  }, [option, selected]);
  const handleInputChange = useCallback(
    (e: any) => {
      //输入后的回调
      setSelected(e.target.value);
      optionRef.current.style.height =
        option.filter((item) => {
          return (item.label as string).includes(e.target.value);
        }).length *
          100 +
        '%';
      if (handleTextChange) {
        handleTextChange(e.target.value);
      }
    },
    [selected],
  );

  return showSearch ? (
    <>
      <div className={style.select} style={{ ...ownsWidth, ...disabledStyle }}>
        <div className={style.selected}>
          <input
            type="text"
            className={style.selected}
            value={selected}
            placeholder={placeholder as string}
            onClick={toggleOptions}
            onChange={(e) => handleInputChange(e)}
          />
          {clearable ? (
            <CloseOutlined onClick={() => setSelected('')} />
          ) : (
            <DownOutlined onClick={toggleOptions} />
          )}
        </div>
        <div className={style.selectOptions} style={ownsWidth} ref={optionRef}>
          {inputFilterOtpions.map((s) => {
            return (
              <div
                key={s.label as any}
                className={style.option}
                style={
                  s.disabled ? { cursor: 'not-allowed', background: 'rgb(238, 238, 238)' } : {}
                }
                onClick={(e) => changeOptions(s as Options, e)}
              >
                {s.label}
              </div>
            );
          })}
        </div>
      </div>
    </>
  ) : (
    <div className={style.select} style={{ ...ownsWidth, ...disabledStyle }}>
      <div className={style.selected} onClick={toggleOptions}>
        {selected ? (
          <div className={style.size}>{selected}</div>
        ) : (
          (placeholder && <div className={style.placeholder}>{placeholder}</div>) || <div />
        )}
        {loading ? <LoadingOutlined /> : <DownOutlined />}
      </div>
      <div className={style.selectOptions} style={ownsWidth} ref={optionRef}>
        {option.map((s) => {
          return (
            <div
              key={s.label as any}
              className={style.option}
              style={s.disabled ? { cursor: 'not-allowed', background: 'rgb(238, 238, 238)' } : {}}
              onClick={(e) => changeOptions(s as Options, e)}
            >
              {s.label}
            </div>
          );
        })}
      </div>
    </div>
  );
};
export default memo(Select);

组件库线上地址：https://fengxinhhh.github.io/React-View-UI-fs/#/common/select
接下来会记录每一个组件…并且更新线上文档

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