我想显示我的父组件中的这三张图片,我试图删除 Summary breadcrumb 之后的行。
trying to remove last line 这是我的父级根类,并试图只显示三张图片而不是该行。
这是 BCrumb.css 文件
.root {
color: #fff;
font-size: 12px;
display: flex;
padding: 1px;
justify-content: initial;
margin-left: 1%;
}
This is BCrumb.tsx class
import * as React from "react";
import classes from "./BCrumb.css";
interface IBCrumbProps {
children?: any;
}
class BCrumb extends React.Component<IBCrumbProps, {}> {
render() {
console.log("Children>>>>"+React.Children.count(this.props.children));
return <div className={classes.root}>
{React.Children.map(this.props.children, (child , i) => {
// here i am trying to hide the line after summary but i //dont know how to implement it here
if (i == 3) return
return child
})}
</div>;
}
}
export default BCrumb;
BCItems.css 文件
.root {
color: #297848;
font-size: 12px;
text-align: center;
margin-left: 13%;
display: flex;
justify-content: space-evenly;
}
.step-title {
color: #297848;
font-size: 12px;
text-align: center;
}
.step-icon.active {
height: 28px;
margin-bottom: 3px;
}
div.disabled {
height: 28px;
opacity: 0.5;
pointer-events: none;
}
.stepconnector {
position: fixed;
height: 1.7px;
width: 3.6%;
margin-top: 2%;
background-color: #ccc;
margin-left: 3.6%;
display: block;
}
BCItems.tsx 类
import * as React from "react";
import classes from "./BCItem.css";
import classnames from "classnames";
interface IBCItemProps{
children?: any;
active?: boolean;
inactiveSrc?: boolean;
activeSrc?: boolean;
}
class BCItems extends React.Component<IBCItemProps, {}> {
render() {
const { children, active, activeSrc, inactiveSrc, label } = this.props;
const className = classnames({
[classes.root]: true,
[classes.disabled]: !active
});
//var i = ;
return (
<div className={className}>
<div>
{active ? (
<img className={classes.img1} src={activeSrc} />
) : (
<img className={classes.img1} src={inactiveSrc} />
)}
<p className={classes.labelText}>{label}</p>
</div>
<div className={classes.stepconnector}></div>
</div>
);
}
}
export default BCItems;
这是显示 BCrumb 元素的类
import * as React from "react";
import BCItems from "../../components/BCrumb/BCItems";
import BCrumb from "../../components/BCrumb/BCrumb";
import Step1_1 from "../../../assets/step-1-active.png";
import Step1_0 from "../../../assets/step-1.png";
import step2_1 from "../../../assets/step-2-active.png";
import step2_0 from "../../../assets/step-2.png";
import step3_1 from "../../../assets/step-3-active.png";
import step3_0 from "../../../assets/step-3.png";
import classes from "./HomePage.css";
class HomePage extends React.Component {
constructor(props) {
super(props);
this.state = { setAct1: true, setAct2: false };
}
render() {
const styles = {
containerStyle: {
paddingLeft: 37
}
};
const { containerStyle } = styles;
return (
<div>
<BCrumb>
<BCItems
active={true}
activeSrc={Step1_1}
inactiveSrc={Step1_0}
label="Profile"
/>
<BCItems
active={true}
activeSrc={Step2_1}
inactiveSrc={Step2_0}
label="DashBoard"
/>
<BCItems
active={true}
activeSrc={Step3_1}
inactiveSrc={Step3_0}
label="Summary"
/>
</BCrumb>
</div>
);
}
}
export default HomePage;
我不知道如何使用 React.Children.map 从父类中隐藏 css 元素(行)的最后一项
最佳答案
使用 last-child
,一个 CSS 选择器:
.root:last-child .stepconnector {
display: none !important;
}
关于javascript - 在 ReactJs 中修改子最后一个组件和 css 属性,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/51684122/