createPortal制作模态窗

[lewenweijia]

import React, { Component } from 'react';
import ReactDOM, { createPortal, unmountComponentAtNode } from 'react-dom';
import './dummy-modal.less';

interface DummyModalProps {
  // 左上角文案
  title?: string;
  // 中心内容
  content?: string | string[];

  // 不展示取消按钮
  noCancel?: boolean;
  // 点击确认按钮回调
  onConfirm?: () => void;
  // 点击取消按钮
  onCancel?: () => void;
  // 确认文本
  onText?: string;
}

class DummyModal extends Component<DummyModalProps> {
  // 傀儡容器
  static overlay: HTMLDivElement | null = null;

  static show(props: DummyModalProps) {
    const overlay = document.createElement('div');

    ReactDOM.render(<DummyModal {...props} />, overlay);

    DummyModal.overlay = overlay;
  }

  // 关闭
  static close() {
    DummyModal.overlay && unmountComponentAtNode(DummyModal.overlay);
  }

  // 弹窗关闭
  handleCancel = () => {
    const { onCancel } = this.props;
    onCancel && onCancel();
    DummyModal.close();
  };

  // 弹窗确认
  handleConfirm = () => {
    this.props.onConfirm && this.props.onConfirm();

    this.handleCancel();
  };

  render() {
    const { title, content, noCancel = false, onText } = this.props;

    const Content = (
      <div className="dummy-modal-wrapper">
        {/* 中心框框 */}
        <div className="dummy-modal-body">
          {/* 头部 */}
          <div className="dummy-modal-header">
            <div className="left-side">{title}</div>
            <div className="right-side close" onClick={this.handleCancel}>
              <i className="neibugongzuotai_iconfont icon-xiaochacha" />
            </div>
          </div>

          {/* 内容区 */}
          <div className="dummy-modal-content">
            {Array.isArray(content)
              ? content.map(i => <div key={i}>{i}</div>)
              : content}
          </div>

          {/* 底部按钮区 */}
          <div className="dummy-modal-btn-actions">
            {!noCancel && (
              <span className="btn btn-cancel" onClick={this.handleCancel}>
                取消
              </span>
            )}
            <span className="btn btn-confirm" onClick={this.handleConfirm}>
              {onText || '确认'}
            </span>
          </div>
        </div>
      </div>
    );

    return createPortal(Content, document.body);
  }
}

export default DummyModal;

[lewenweijia]

.dummy-modal-wrapper {
  position: absolute;
  height: 100%;
  width: 100%;
  top: 0;
  left: 0;
  background: rgba(255, 255, 255, 0.8);
  z-index: 2;
  display: flex;
  justify-content: center;
  align-items: center;
}

.dummy-modal-wrapper > .dummy-modal-body {
  box-shadow: 0px 6px 16px 0px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(230, 230, 230, 1);
  background: white;
  border-radius: 4px;
  min-width: 540px;
  font-size: 14px;

  // 头部
  .dummy-modal-header {
    display: flex;
    padding: 20px;
    .left-side {
      color: #4c4c4c;
    }

    .right-side.close {
      margin-left: auto;

      .icon-xiaochacha {
        cursor: pointer;
        font-size: 13px;
        color: #999;
        position: relative;
        top: 1px;
      }
    }
  }

  // 内容区
  .dummy-modal-content {
    margin-top: 40px;
    margin-bottom: 30px;
    padding: 0 55px;
    font-size: 16px;
    display: flex;
    flex-flow: column nowrap;
    align-items: center;
  }

  // 底部按钮区
  .dummy-modal-btn-actions {
    display: flex;
    margin: 0 95px 50px;
    justify-content: center;

    .btn {
      width: 160px;
      height: 40px;
      border-radius: 2px;
      display: flex;
      justify-content: center;
      align-items: center;
      cursor: pointer;

      &.btn-cancel {
        color: #1989fa;
        background: white;
        border: 1px solid #1989fa;
        margin-right: 30px;
        &:hover {
          background: rgba(25, 137, 250, 0.3);
        }
        &:active {
          color: white;
          background: #1989fa;
        }
      }

      &.btn-confirm {
        color: white;
        background: #1989fa;
        border: 1px solid #1989fa;
        &:hover {
          background: #1571ce;
        }
      }
    }
  }
}