我尝试在中创建折叠和展开侧菜单React (v 16.5)
符合以下标准 -
页面加载时,第一个项目(通告)将处于展开视图中。任何一个项目都可以一次展开,例如,如果用户单击第二个项目(规格),第一个项目将折叠。我还想要在折叠/展开事务期间使用一些 CSS 动画,例如平滑地向下/向上移动每个项目的主体部分并更改箭头图标。我的方法是在每个项目上添加/删除 CSS 类(sidebar-nav-menu-item
) 动态地,例如 -
sidebar-nav-menu-item item-active
因此,当一个项目处于展开视图中时,它应该像上面的类一样并删除item-active
当它处于折叠视图时。默认情况下,主体div
当项目处于折叠模式时,应通过 CSS 隐藏 s (sidebar-nav-menu-item-body)。
import React, { Component } from 'react';
className SidebarNavs extends React.Component{
constructor(props) {
super(props);
}
render() {
return(
<div className="sidebar-nav">
<div className="sidebar-nav-menu">
<div className="sidebar-nav-menu-item" data-id="circulars">
<div className="sidebar-nav-menu-item-head" onClick={this.handleExpandCollaps}>
<div className="sidebar-nav-menu-item-head-title">Circulars</div>
<div className="sidebar-nav-menu-item-head-help">
<button type="button" className="btn-help" onClick={this.moreInfoClick}>View more info</button>
</div>
<div className="sidebar-nav-menu-item-head-icon">
<i className="fa fa-caret-down" aria-hidden="true"></i>
</div>
</div>
<div className="sidebar-nav-menu-item-body">BODY CONTENT HERE</div>
</div>
<div className="sidebar-nav-menu-item" data-id="specifications">
<div className="sidebar-nav-menu-item-head" onClick={this.handleExpandCollaps}>
<div className="sidebar-nav-menu-item-head-title">Specifications</div>
<div className="sidebar-nav-menu-item-head-help">
<button type="button" className="btn-help" onClick={this.moreInfoClick}>View more info</button>
</div>
<div className="sidebar-nav-menu-item-head-icon">
<i className="fa fa-caret-down" aria-hidden="true"></i>
</div>
</div>
<div className="sidebar-nav-menu-item-body">BODY CONTENT HERE</div>
</div>
<div className="sidebar-nav-menu-item" data-id="wo">
<div className="sidebar-nav-menu-item-head" onClick={this.handleExpandCollaps}>
<div className="sidebar-nav-menu-item-head-title">Work Orders</div>
<div className="sidebar-nav-menu-item-head-help">
<button type="button" className="btn-help" onClick={this.moreInfoClick}>View more info</button>
</div>
<div className="sidebar-nav-menu-item-head-icon">
<i className="fa fa-caret-down" aria-hidden="true"></i>
</div>
</div>
<div className="sidebar-nav-menu-item-body">BODY CONTENT HERE</div>
</div>
</div>
</div>
)
}
}
export default SidebarNavs;
CSS:
.sidebar-nav-menu-item{
display:block;
}
.sidebar-nav-menu-item-body{
display:none;
}
.sidebar-nav-menu-item.item-active .sidebar-nav-menu-item-body{
display:block;
}
您应该使用状态变量来显示可折叠项目处于活动/非活动状态。
我稍微修改了您的代码以适应您的要求。
class App extends Component {
constructor() {
super();
this.state = {
activeCollapse: 'circulars'
};
}
handleExpandCollaps = (name) => {
if (this.state.activeCollapse === name) {
this.setState({ activeCollapse: '' })
} else {
this.setState({ activeCollapse: name })
}
}
moreInfoClick = (e) => {
e.stopPropagation();
console.log("clicked");
}
render() {
return (
<div>
<div className="sidebar-nav">
<div className="sidebar-nav-menu">
<div className={`sidebar-nav-menu-item ${this.state.activeCollapse === "circulars" ? 'item-active' : ''}`} onClick={() => this.handleExpandCollaps("circulars")} data-id="circulars" >
<div className="sidebar-nav-menu-item-head">
<span className="sidebar-nav-menu-item-head-title">Circulars</span>
<span className="sidebar-nav-menu-item-head-help">
<button type="button" className="btn-help" onClick={this.moreInfoClick}>View more info</button>
</span>
</div>
<div className="sidebar-nav-menu-item-body">BODY CONTENT HERE</div>
</div>
<div className={`sidebar-nav-menu-item ${this.state.activeCollapse === "specifications" ? 'item-active' : ''}`} onClick={() => this.handleExpandCollaps("specifications")} data-id="specifications">
<div className="sidebar-nav-menu-item-head">
<span className="sidebar-nav-menu-item-head-title">Specifications</span>
<span className="sidebar-nav-menu-item-head-help">
<button type="button" className="btn-help" onClick={this.moreInfoClick}>View more info</button>
</span>
</div>
<div className="sidebar-nav-menu-item-body">BODY CONTENT HERE</div>
</div>
<div className={`sidebar-nav-menu-item ${this.state.activeCollapse === "wo" ? 'item-active' : ''}`} onClick={() => this.handleExpandCollaps("wo")} data-id="wo">
<div className="sidebar-nav-menu-item-head">
<span className="sidebar-nav-menu-item-head-title">Work Orders</span>
<span className="sidebar-nav-menu-item-head-help">
<button type="button" className="btn-help" onClick={this.moreInfoClick}>View more info</button>
</span>
</div>
<div className="sidebar-nav-menu-item-body">BODY CONTENT HERE</div>
</div>
</div>
</div>
</div>
);
}
}
Note:我用过CSS
for font-awesome
图标。希望您已添加font-awesome
Demo https://stackblitz.com/edit/react-irrf9e
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