我非常喜欢React中的内联CSS模式,并决定使用它。
但是,你不能使用:hover和类似的选择器。那么,在使用内联CSS样式时实现高亮悬停的最佳方法是什么呢?
#reactjs的一个建议是有一个Clickable组件,并像这样使用它:
<Clickable>
<Link />
</Clickable>
Clickable有一个悬停状态,并将其作为道具传递给链接。然而,Clickable(我实现它的方式)将链接包装在一个div中,以便它可以设置onMouseEnter和onMouseLeave。这让事情变得有点复杂(例如,在div中包装的span与span的行为不同)。
有没有更简单的方法?
我不能100%确定这是否是答案,但这是我用来模拟CSS的技巧:带有颜色和图像的悬停效果。
`This works best with an image`
class TestHover extends React.PureComponent {
render() {
const landingImage = {
"backgroundImage": "url(https://i.dailymail.co.uk/i/pix/2015/09/01/18/2BE1E88B00000578-3218613-image-m-5_1441127035222.jpg)",
"BackgroundColor": "Red", `this can be any color`
"minHeight": "100%",
"backgroundAttachment": "fixed",
"backgroundPosition": "center",
"backgroundRepeat": "no-repeat",
"backgroundSize": "cover",
"opacity": "0.8", `the hove trick is here in the opcaity slightly see through gives the effect when the background color changes`
}
return (
<aside className="menu">
<div className="menu-item">
<div style={landingImage}>SOME TEXT</div>
</div>
</aside>
);
}
}
ReactDOM.render(
<TestHover />,
document.getElementById("root")
);
CSS:
.menu {
top: 2.70em;
bottom: 0px;
width: 100%;
position: absolute;
}
.menu-item {
cursor: pointer;
height: 100%;
font-size: 2em;
line-height: 1.3em;
color: #000;
font-family: "Poppins";
font-style: italic;
font-weight: 800;
text-align: center;
display: flex;
flex-direction: column;
justify-content: center;
}
前徘徊
.menu-item:nth-child(1) {
color: white;
background-color: #001b37;
}
在徘徊
.menu-item:nth-child(1):hover {
color: green;
background-color: white;
}
例如:https://codepen.io/roryfn/pen/dxyYqj?editors=0011
onMouseEnter={(e) => {
e.target.style.backgroundColor = '#e13570';
e.target.style.border = '2px solid rgb(31, 0, 69)';
e.target.style.boxShadow = '-2px 0px 7px 2px #e13570';
}}
onMouseLeave={(e) => {
e.target.style.backgroundColor = 'rgb(31, 0, 69)';
e.target.style.border = '2px solid #593676';
e.target.style.boxShadow = '-2px 0px 7px 2px #e13570';
}}
在样式或类中设置默认属性,然后调用onMouseLeave()和onMouseEnter()来创建悬停功能。
补充乔纳森的回答,这里是事件覆盖的焦点和活跃状态,使用onMouseOver而不是onMouseEnter,因为后者不会冒泡,如果你有任何子元素的目标事件被应用到。
var Link = React.createClass({
getInitialState: function(){
return {hover: false, active: false, focus: false}
},
toggleHover: function(){
this.setState({hover: !this.state.hover})
},
toggleActive: function(){
this.setState({active: !this.state.active})
},
toggleFocus: function(){
this.setState({focus: !this.state.focus})
},
render: function() {
var linkStyle;
if (this.state.hover) {
linkStyle = {backgroundColor: 'red'}
} else if (this.state.active) {
linkStyle = {backgroundColor: 'blue'}
} else if (this.state.focus) {
linkStyle = {backgroundColor: 'purple'}
}
return(
<div>
<a style={linkStyle}
onMouseOver={this.toggleHover}
onMouseOut={this.toggleHover}
onMouseUp={this.toggleActive}
onMouseDown={this.toggleActive}
onFocus={this.toggleFocus}>
Link
</a>
</div>
)
}