看了一下,上一篇文章还是 1.1 号写的,一恍二十多天过来了。轻易写一点 react 无关的货色吧,这一篇文章次要参考了 https://www.cnblogs.com/demod…。
第一步:先写动态模版
src/component/Modal.tsx
import React from 'react';
import PropTypes from 'prop-types';
import './Modal.css'
interface ModalProps {onOk: (event: React.MouseEvent<HTMLButtonElement, MouseEvent>) => void;
onCancel: (event: React.MouseEvent<HTMLButtonElement, MouseEvent>) => void;
title: string;
children: PropTypes.ReactElementLike;
}
export default class Modal extends React.Component<ModalProps> {render() {
return (
<div className="modal-container">
<div className="modal-instance">
<div className="modal-title">
{this.props.title}
</div>
<div className="modal-content">
{this.props.children}
</div>
<div className="modal-footer">
<button onClick={this.props.onOk} className="button cancel-button"> 勾销 </button>
<button onClick={this.props.onCancel} className="submit submit-button"> 确认 </button>
</div>
</div>
</div>
)
}
}
款式轻易写写:
.modal-container {
position: fixed;
top: 0;
left: 0;
height: 100%;
width: 100%;
background-color:rgba(4,4,4, 0.45);
}
.modal-instance {
position: absolute;
top: 50%;
left: 50%;
background-color: #ffffff;
transform: translate(-50%, -50%);
border-radius: 3px;
border-style: 1px solid #353535;
}
.modal-title {
height: 20px;
width: 100%;
min-width: 500px;
font-size: 16px;
font-weight: 500;
display: flex;
align-items: center;
}
.modal-content {padding: 5px;}
.modal-footer {
height: 30px;
font-size: 14px;
display: flex;
align-items: center;
}
当初开始调用 modal:
class Game extends React.Component<Props, TestState> {constructor(props: Props) {super(props);
this.state = {isShowModal: false}
}
openModal = () => {
this.setState({isShowModal: true})
}
render() {
const ModalProps = {onOk: (event: React.MouseEvent<HTMLButtonElement, MouseEvent>) => {},
onCancel:(event: React.MouseEvent<HTMLButtonElement, MouseEvent>) => {},
title: '测试 modal',
}
const {isShowModal} = this.state;
return (<>
{isShowModal && <Modal {...ModalProps}>
<div>
{'modal content'}
</div>
</Modal>}
<button onClick={this.openModal}> 弹出 modal 框 </button>
</>
);
当初为止咱们实现了一个简略的动态的 modal 弹框。当初咱们心愿提供更多的调用形式,比方我心愿应用 ModalService.open(template, {onOk: () => {}, onCancel: () => {}}) 这种 api 进行调用。那咱们就须要进行封装:
export class ModalService {static open(props: ModalProps) {const modalContainer = document.createElement('div');
document.body.appendChild(modalContainer);
function onOk() {props.onOk();
ReactDOM.unmountComponentAtNode(modalContainer);
}
function onCancel() {props.onCancel();
ReactDOM.unmountComponentAtNode(modalContainer);
}
ReactDOM.render(<Modal {...props} onOk={onOk} onCancel={onCancel} />, modalContainer);
}
}
当初咱们来测试一下 ModalService.open 的调用弹框形式
openModalService = () => {const inputNameChange = (event: React.ChangeEvent<HTMLInputElement>) => {
this.setState({inputName: event.target.value});
}
ModalService.open({onOk: () => {console.log(this.state.inputName);
console.log('modal submit ???? by service, and close')
},
onCancel: () => {
this.setState({inputName: ''})
console.log('modal cancel ❌ by service, and close')
},
title: '这是 service 关上的',
children: (<input type="text" value={this.state.inputName} onChange={inputNameChange} />)
})
}
这里其实有个 bug,这里的 input 弹框绑定了 value={this.state.inputName} 来绑定,然而其实这个 element 并没有真正的实现数据绑定,因为他只是创立了一次,并没有和 render 函数关联所以会呈现,任何对 input 文本框的输出,都看不到的状况。所以在有输出模版为 form 的状况下,更好的形式是应用组件调用,在 render 中应用组件调用的形式。
{isShowModal && <Modal {...ModalProps}>
<div>
{'modal content'}
<input type="text" value={this.state.inputNameStash} onChange={this.inputNameChange} />
</div>
</Modal>}
相似这样写。或者 modalservice.open 的形式关上一个 render 办法中定义的 ref。然而这样如同不太合乎 react 哲学(so?
最初封装一个链式调用的 api 吧。
1. 先革新 modalservice 使他返回一个 promise
export class ModalService {static open(props: ModalProps) {const modalContainer = document.createElement('div');
document.body.appendChild(modalContainer);
return new Promise<void>((resolve, reject) => {function onOk() {props.onOk && props.onOk();
ReactDOM.unmountComponentAtNode(modalContainer);
resolve();}
function onCancel() {props.onCancel && props.onCancel();
ReactDOM.unmountComponentAtNode(modalContainer);
reject();}
ReactDOM.render(<Modal {...props} onOk={onOk} onCancel={onCancel} />, modalContainer);
})
}
}
调用形式改为:
openModalServicePromise = async () => {
ModalService.open({
title: '期待返回 promise 进行链式调用',
children: '这是期待的 promise 返回的格局,这样更好用感觉'
}).then(() => {console.log('modal 点击了确定✅, and close')
}).catch(() => {console.log('modal 点击了勾销????️, and close')
})
}
几乎 perfect!