我会从配置的角度来解决这个问题,因为它更具可扩展性。如果你想最终改用 Formik 或 React Form 之类的东西,它会让移动变得更容易一些。
有一个要转换为输入字段的对象数组。您的主组件应该保持状态是否 <Form />
组件正在显示,以及它是否在配置和任何相关处理程序中可见。
你的表单组件应该维护输入的状态,当你提交它时,将完成的状态传递给父级。
const { Component } = React;
class Example extends Component {
constructor(props) {
super();
// The only state in the main component
// is whether the form is visible or not
this.state = { visible: false };
}
addForm = () => {
this.setState({ visible: true });
}
removeForm = () => {
this.setState({ visible: false });
}
handleSubmit = (form) => {
console.log(form);
}
render() {
const { visible } = this.state;
const { config } = this.props;
return (
<div>
<button
type="button"
onClick={this.addForm}
>Add form
</button>
{visible && (
<Form
config={config}
handleSubmit={this.handleSubmit}
handleClose={this.removeForm}
/>
)}
</div>
);
}
};
class Form extends Component {
constructor(props) {
super();
this.state = props.config.reduce((acc, c) => {
return { ...acc, [c.name]: '' };
}, {});
}
handleChange = (e) => {
const { name, value } = e.target;
this.setState({ [name]: value });
}
handleSubmit = () => {
this.props.handleSubmit(this.state);
}
render() {
const { name, email, phone } = this.state;
const { handleClose, config } = this.props;
return (
<div onChange={this.handleChange}>
{config.map(input => {
const { id, name, type, required } = input;
return (
<div>
<label>{name}</label>
<input key={id} name={name} type={type} required={required} />
</div>
)
})}
<button type="button" onClick={this.handleSubmit}>Submit form</button>
<button type="button" onClick={handleClose}>Remove form</button>
</div>
);
}
}
const config = [
{ id: 1, name: 'name', type: 'text', required: true },
{ id: 2, name: 'email', type: 'email', required: true },
{ id: 3, name: 'phone', type: 'phone', required: true }
];
ReactDOM.render(
<Example config={config} />,
document.getElementById('react')
);
input { display: block; }
label { text-transform: capitalize; }
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/17.0.2/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/17.0.2/umd/react-dom.production.min.js"></script>
<div id="react"></div>
写下如何生成你想要的东西的每一个细节有点困难。因此,我发现为您准备一个
stackblitz
链接以查看它是如何做到的要容易得多,并且该链接已在下面准备好:generating a dynamic div adding and removing by handling inputs state value