react 自定义loading组件

一、组件

import React from 'react';
import ReactDOM from 'react-dom'
import stylus from './stylus.styl';
import classNames from "classnames/bind";

const ctx = classNames.bind(stylus);

const LoadingNode = (props) => {
    const {content} = props;
    return (
        <div className={ctx('loading-mask-box-npsp')}>
            <div className={ctx('loading-la-dl')}>
                <div className={ctx('loading-cir-la')}></div>
                <div className={ctx('loading-cir-la-content')}>{content ? content : '正在刷新'}</div>
            </div>

        </div>
    )
}

class Loading extends React.Component {
    constructor(props) {
        super(props);
        let element = document.createElement('div')
        element.id = 'other-root';
        this.state = {
            element,
        }
    }

    open = (data) => {
        const {element} = this.state;
        document.body.appendChild(element);
        ReactDOM.render(
            <LoadingNode
                content={data.content}
            />,
            element);
    }
    close = () => {
        const {element} = this.state;
        element.remove()
    }
}

const loading = new Loading();
export default loading;

二、css

.loading-mask-box-npsp
    display flex
    align-items center
    justify-content center
    position fixed
    top 0
    left 0
    width 100vw
    height 100vh
    background rgba(121, 128, 121, 0.71)
    & > .loading-la-dl
        display flex
        flex-direction column
        align-items center
        justify-content center
        & > .loading-cir-la
            width 4rem
            height 4rem
            border 3px solid #fff
            border-radius 50%
            border-top-color #b1111f
            animation roateloading .6s infinite linear
        & > .loading-cir-la-content
            font-size 2rem
            font-weight 400
            color #fff

@keyframes roateloading{
    from{
        transform rotate(0);
    }
    to{
        transform rotate(300deg);
    }
}

三、使用import loading from "../../components/loading";

loading.open({
            content:'loading'
        });
        setTimeout(function () {
            loading.close();
        },3000)