我想通过下拉菜单完成以下操作。
I'd like to accomplish the following with my drop down menu.
1 - 点击后显示
1 - Show it upon click
2 - 在第二次点击时隐藏它
2 -Hide it on second click
3 - 点击它之外的任何地方时隐藏它。
3 - Hide it when clicking anywhere outside of it.
4 - 用幻灯片效果完成所有这些
4 - Do all that with a slide effect
我已经有1-3个被覆盖。我在4上被阻止。
如何创建幻灯片效果以及下面发生的点击事件?
我使用jQuery的slideToggle(未在此处显示)得到了一个可靠的概念证明......但是,我想学习如何以反应的方式做到这一点。
I've got a working proof of concept using jQuery's slideToggle (not shown here)... however, I'd like to learn how to do it in the react way.
如果您想查看完整的代码: 做出反应下拉导航栏
in case you'd like to see the full the code: react drop-down nav bar
// CASE 1 Show Hide on click, no slide effect yet class ServicesDropdown extends Component { constructor() { super(); this.state = { dropdown: false }; } handleClick = () => { if (!this.state.dropdown) { // attach/remove event handler document.addEventListener('click', this.handleOutsideClick, false); } else { document.removeEventListener('click', this.handleOutsideClick, false); } this.setState(prevState => ({ dropdown: !prevState.dropdown, })); } handleOutsideClick = (e) => { // ignore clicks on the component itself if (this.node.contains(e.target)) { return; } this.handleClick(); } render() { return ( <li ref={node => { this.node = node; }}> <a href="#!" onClick={this.handleClick}>Services +</a> {this.state.dropdown && ( <ul className="nav-dropdown" ref={node => { this.node = node; }}> <li><a href="#!">Web Design</a></li> <li><a href="#!">Web Development</a></li> <li><a href="#!">Graphic Design</a></li> </ul> )} </li> ) } }推荐答案
前段时间我想出了如何将一个向下滑动的效果应用于React组件,它不是完全相同的行为,但你可能会发现我的代码和描述有用。请在此处查看我对其他相关问题的回答: stackoverflow/a/48743317/1216245
A while ago I figured out how to apply a slide-down effect to a React component, it's not exactly the same behavior but you might find my code & description useful. See my answer to a different, related question here: stackoverflow/a/48743317/1216245
博客文章在这里: blog.lunarlogic.io/2018/slidedown-menu-in-react / 即可。随意窃取代码的任何部分。
The blog post is here: blog.lunarlogic.io/2018/slidedown-menu-in-react/. Feel free to steal any part of the code.
以下是对最重要部分的简短描述解决方案。
对于React / JSX部分,将包装要在CSSTransitionGroup中滑动的组件。 (您可以在此处详细了解此React插件: https:/ /reactjs/docs/animation.html#high-level-api-reactcsstransitiongroup 和这里: reactcommunity/react-transition-group/ 。)
As for the React/JSX part, you wrap the component that you'd like to slide in a CSSTransitionGroup. (You can read more about this React Add-on here: reactjs/docs/animation.html#high-level-api-reactcsstransitiongroup and here: reactcommunity/react-transition-group/.)
<div className="component-container"> <CSSTransitionGroup transitionName="slide" transitionEnterTimeout={300} transitionLeaveTimeout={300} > { this.state.showComponent && <Component /> } </CSSTransitionGroup> </div>请注意,它全部包装在一个容器中,动画像你一样工作所需我喜欢它。
Note that it's all wrapped in a container, which you'll need for the animation to work like you'd like it to.
这是我用于幻灯片动画效果的CSS:
And here is the CSS I used for the slide animation effect:
/* Slide animation styles. You may need to add vendor prefixes for transform depending on your desired browser support. */ .slide-enter { transform: translateY(-100%); transition: .3s cubic-bezier(0, 1, 0.5, 1); &.slide-enter-active { transform: translateY(0%); } } .slide-leave { transform: translateY(0%); transition: .3s ease-in-out; &.slide-leave-active { transform: translateY(-100%); } } /* CSS for the submenu container needed to adjust the behavior to our needs. Try commenting out this part to see how the animation looks without the container involved. */ ponent-container { height: $component-height; // set to the width of your component or a higher approximation if it's not fixed min-width: $component-width; // set to the width of your component or a higher approximation if it's not fixed }完整的例子&演示请查看 blog.lunarlogic.io/2018/slidedown-菜单中的反应/ 。
For the full example & demo check out blog.lunarlogic.io/2018/slidedown-menu-in-react/.
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