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ReactJS多级下拉菜单

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Mendes · 技术社区 · 7 年前

我正在尝试构建一个多级别的ReactJS下拉菜单。我使用以下文章/代码作为基础: the following post 和 this jsfiddle code 作为我的ReactJS组件的起点:

class DropdownMenu extends Component {
  static propTypes = {
    config: PropTypes.array.isRequired
  };

  getMenuItemTitle = (menuItem, index, depthLevel) => {
    return menuItem.title;
  };

  getMenuItem = (menuItem, depthLevel, index) => {
    let title = this.getMenuItemTitle(menuItem, index, depthLevel);

    if (menuItem.submenu && menuItem.submenu.length > 0) {
      return (
        <li>
          {title}
          <DropdownMenu config={menuItem.submenu} submenu={true} />
        </li>
      );
    } else {
      return <li>{title}</li>;
    }
  };

  render = () => {
    let { config } = this.props;

    let options = [];
    config.map((item, index) => {
      options.push(this.getMenuItem(item, 0, index));
    });

    if (this.props.submenu && this.props.submenu === true)
      return <ul>{options}</ul>;

    return <ul className="dropdown-menu">{options}</ul>;
  };
}

export default DropdownMenu;

CSS文件:

.dropdown-menu {
    height: 35px;
    list-style: none;
    margin: 0;
    padding: 0;
    float: left;
    text-align: center;
}

.dropdown-menu li {
    display: inline-block;
    position: relative;
    float: left;
}

.dropdown-menu li a {
    display: inline-block;
    width: 200px;
    line-height: 35px;
    text-decoration: none;
}

.dropdown-menu li li a {
    font-size: 12px;
}

.dropdown-menu li:hover {
    background: blue;
}

/*--- Sublist Styles ---*/
.dropdown-menu ul {
    position: absolute;
    display: none;
}

/*--- Hide Sub Sublists ---*/
.dropdown-menu li:hover ul ul {
    display: none;
}

/*--- Sublevel UL's display and position on hover ---*/
.dropdown-menu li:hover ul {
    display: block;
}
.dropdown-menu li li:hover ul {
    margin-left: 200px;
    margin-top: -35px;
    display: block;
}
nu-li {
    padding: 10px;
}

.dropdown-submenu {
    position: absolute;
    left: 0px;
    top: 0px;
}

最后是我的配置文件:

  "navItems": [
    {
      "title": "Option 1",
      "submenu": null
    },
    {
      "title": "Option 2",
      "submenu": [
        {
          "title": "Option 2.1",
          "submenu": [
            {
              "title": "Option 2.1.1",
              "submenu": null
            },
            {
              "title": "Option 2.1.2",
              "submenu": null
            }
          ]
        },
        {
          "title": "Option 2.2",
          "submenu": [
            {
              "title": "Option 2.2.1",
              "submenu": null
            },
            {
              "title": "Option 2.2.2",
              "submenu": null
            }
          ]
        }
      ]
    }
  ]

我得到了一份凌乱的菜单,上面有其他选项,我确信我遗漏了一些简单的东西。

如何在真正的多级别下拉菜单中打开组件?

1 回复 | 直到 6 年前

jonaslagoni 6 年前

jsfiddle to your question here

.dropdown-menu li {
    display: inline-block;
    position: relative;
    float: left;
}

.dropdown-menu li a {
    display: inline-block;
    width: 200px;
    line-height: 35px;
    text-decoration: none;
}

.dropdown-menu li {
    display: inline-block;
    position: relative;
    float: left;
    width: 200px;
    line-height: 35px;
    text-decoration: none;
}