组件介绍
Loading组件是日常开发用的很多的组件，这次封装主要包含两种状态的Loading，旋转、省略号，话不多说先看一下组件的文档页面吧：
Loading API能力
组件一共提供了如下的API能力，可以在使用时更灵活：
- type表示loading类型，默认是default，当用户需要使用省略样式，设置type=dot即可；
- mask配置蒙层，可在loading时遮挡覆盖内容为半透明状态，适用于内容未加载时的遮盖；
- loadingText配置加载文字，在图标下显示；
- icon配置自定义图标，可配置自己所需要的Icon或svg图标；
- width配置自定义宽度；
- height配置自定义高度；
- style配置loading整体自定义样式；
组件源码
index.tsx:
import React, { FC, useEffect, useRef, useState, Fragment, useMemo } from 'react';
import { LoadingProps } from './interface';
import './index.module.less';
const Loading: FC<LoadingProps> = (props) => {
const {
type = 'default',
mask = false,
loadingText,
icon,
width = '2em',
height = '2em',
style = {},
} = props;
const timer = useRef<any>(null);
const [activeDotIndex, setActiveDotIndex] = useState(0);
useEffect(() => {
timer.current = setInterval(() => {
setActiveDotIndex((old) => {
if (old === 2) {
old = 0;
} else {
old++;
}
return old;
});
}, 500);
return () => {
clearInterval(timer.current);
};
}, []);
const loadingStyle = useMemo(() => {
const returnStyle = style;
returnStyle.width = width;
returnStyle.height = height;
return returnStyle;
}, [width, height, style]);
return (
<Fragment>
{mask && <div className="dialog" />}
{type === 'default' ? (
<div className="loading" style={loadingStyle}>
<div className="loading-container">
{icon || (
<svg
fill="none"
stroke="currentColor"
stroke-width="4"
width={width}
height={height}
viewBox="0 0 48 48"
aria-hidden="true"
focusable="false"
>
<path d="M42 24c0 9.941-8.059 18-18 18S6 33.941 6 24 14.059 6 24 6"></path>
</svg>
)}
</div>
{loadingText && <div className="text">{loadingText}</div>}
</div>
) : (
<div className="dot-loading">
{new Array(3).fill('').map((item, index) => {
return <div className={activeDotIndex === index ? 'dot-active' : 'dot'}>{item}</div>;
})}
</div>
)}
</Fragment>
);
};
export default Loading;
组件测试源码
loading.test.tsx:
import React from 'react';
import Loading from '../../Loading/index';
import Enzyme from '../setup';
import mountTest from '../mountTest';
import ReactDOM from 'react-dom';
const { mount } = Enzyme;
let container: HTMLDivElement | null;
mountTest(Loading);
describe('loading', () => {
beforeEach(() => {
container = document.createElement('div');
document.body.appendChild(container);
});
afterEach(() => {
document.body.removeChild(container as HTMLDivElement);
container = null;
});
it('test loading show correctly', () => {
//测试基础加载
const loading = mount(<Loading />);
expect(loading.find('.loading .loading-container svg')).toHaveLength(1);
expect(loading.find('.loading .text')).toHaveLength(0);
});
it('test dot loading show correctly', () => {
//测试省略号加载
const loading = mount(<Loading type="dot" />);
expect(loading.find('.dot-loading')).toHaveLength(1);
});
it('test mask loading has dialog', () => {
//测试加载蒙层
const loading = mount(<Loading mask />);
expect(loading.find('.dialog')).toHaveLength(1);
});
it('test mask loading has dialog', () => {
//测试加载蒙层
const loading = mount(<Loading loadingText="test loading" />);
expect(loading.find('.loading .text').text()).toBe('test loading');
});
it('test diffenent size loading show correctly', () => {
//测试不同大小loading、loading自定义样式
const component = <Loading width="3em" height="3em" style={{ marginLeft: '100px' }} />;
ReactDOM.render(component, container);
const loadingDom = container?.querySelector('.loading');
expect(
loadingDom?.getAttribute('style')?.includes('margin-left: 100px; width: 3em; height: 3em;'),
);
const svgDom = loadingDom?.querySelector('svg');
expect(
svgDom?.getAttribute('width') === '3em' && svgDom?.getAttribute('height') === '3em',
).toBe(true);
});
});
组件库线上地址
React-View-UI组件库线上链接：http://react-view-ui.com:92/#
github：https://github.com/fengxinhhh/React-View-UI-fs
npm：https://www.npmjs.com/package/react-view-ui
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