在实践中反应：用钩子改善形式
来源：dev.to
2025-02-17 10:13:00
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知识点掌握了，还需要不断练习才能熟练运用。下面golang学习网给大家带来一个文章开发实战，手把手教大家学习《在实践中反应：用钩子改善形式》，在实现功能的过程中也带大家重新温习相关知识点，温故而知新，回头看看说不定又有不一样的感悟！
使用表格
一个常见的情况是处理表格的逻辑，可以为自定义钩提取
// form.tsx
import { formeventhandler, usestate } from "react";
function forms() {
const [title, settitle] = usestate("");
const [price, setprice] = usestate("");
const [description, setdescription] = usestate("");
const [image, setimage] = usestate("");
const [category, setcategory] = usestate("");
const [data, setdata] = usestate<any>(null);
const [isloading, setisloading] = usestate(false);
const [error, seterror] = usestate<any>(null);
const handlesubmit: formeventhandler<htmlformelement> = async (e) => {
try {
setisloading(true);
e.preventdefault();
const response = await fetch("https://fakestoreapi.com/products", {
method: "post",
body: json.stringify({
title,
price,
description,
image,
category,
}),
});
const data = await response.json();
setdata(data);
} catch (e) {
seterror(e);
} finally {
setisloading(false);
}
};
return (
<form
style={{ display: "flex", flexflow: "column", gap: 10 }}
onsubmit={handlesubmit}
>
<label htmlfor="name">title:</label>
<input
type="text"
id="title"
name="title"
value={title}
onchange={({ target: { value } }) => settitle(value)}
/>
<label htmlfor="price">price:</label>
<input
type="number"
id="price"
name="price"
value={price}
onchange={({ target: { value } }) => setprice(value)}
/>
<label htmlfor="description">description:</label>
<textarea
id="description"
name="description"
value={description}
onchange={({ target: { value } }) => setdescription(value)}
/>
<label htmlfor="image">image:</label>
<input
type="url"
id="image"
name="image"
onchange={({ target: { value } }) => setimage(value)}
/>
<label htmlfor="category">category:</label>
<select
id="category"
name="category"
value={category}
onchange={({ target: { value } }) => setcategory(value)}
>
<option value="electronics">electronics</option>
<option value="jewelery">jewelery</option>
<option value="men's clothing">men's clothing</option>
<option value="women's clothing">women's clothing</option>
</select>
<button disabled={isloading} type="submit">
send
</button>
<div>error: {json.stringify(error)}</div>
<div>response: {json.stringify(data)}</div>
</form>
);
}
export default forms;
>在核心上，该组件涉及创建产品的想法，具有状态>
对于每个形式的字段和形式的状态
可以通过步骤完成此组件的重写。在处理请求的示例中，我们可以享受一部分我们所做的事情：
提取请求状态
// usemutate.tsx
import { usecallback, usestate } from "react";
export type usemutateparams<t, a> = {
mutation: (args: a) => promise<t>;
};
export function usemutate<t, a>({ mutation }: usemutateparams<t, a>) {
const [isloading, setisloading] = usestate(false);
const [error, seterror] = usestate<any>(null);
const [data, setdata] = usestate<t | null>(null);
const mutate = usecallback(
async (args: a) => {
try {
setisloading(true);
const data = await mutation(args);
setdata(data);
} catch (e) {
seterror(e);
} finally {
setisloading(false);
}
},
[mutation],
);
return {
isloading,
error,
data,
mutate,
};
}
// form.tsx
import { formeventhandler, usestate } from "react";
import { usemutate } from "../hooks/usemutate.tsx";
function forms() {
const [title, settitle] = usestate("");
const [price, setprice] = usestate("");
const [description, setdescription] = usestate("");
const [image, setimage] = usestate("");
const [category, setcategory] = usestate("");
const { mutate, data, isloading, error } = usemutate({
mutation: async (body) => {
const response = await fetch("https://fakestoreapi.com/products", {
method: "post",
body: json.stringify(body),
});
return response.json();
},
});
const handlesubmit: formeventhandler<htmlformelement> = async (e) => {
e.preventdefault();
await mutate(
json.stringify({
title,
price,
description,
category,
image,
}),
);
};
return (
<form
style={{ display: "flex", flexflow: "column", gap: 10 }}
onsubmit={handlesubmit}
>
<label htmlfor="name">title:</label>
<input
type="text"
id="title"
name="title"
value={title}
onchange={({ target: { value } }) => settitle(value)}
/>
<label htmlfor="price">price:</label>
<input
type="number"
id="price"
name="price"
value={price}
onchange={({ target: { value } }) => setprice(value)}
/>
<label htmlfor="description">description:</label>
<textarea
id="description"
name="description"
value={description}
onchange={({ target: { value } }) => setdescription(value)}
/>
<label htmlfor="image">image:</label>
<input
type="url"
id="image"
name="image"
onchange={({ target: { value } }) => setimage(value)}
/>
<label htmlfor="category">category:</label>
<select
id="category"
name="category"
value={category}
onchange={({ target: { value } }) => setcategory(value)}
>
<option value="electronics">electronics</option>
<option value="jewelery">jewelery</option>
<option value="men's clothing">men's clothing</option>
<option value="women's clothing">women's clothing</option>
</select>
<button disabled={isloading} type="submit">
send
</button>
<div>error: {json.stringify(error)}</div>
<div>response: {json.stringify(data)}</div>
</form>
);
}
export default forms;
驱动器表单字段
import { formeventhandler } from "react";
import { usemutate } from "../hooks/usemutate.tsx";
function forms() {
const { mutate, data, isloading, error } = usemutate({
mutation: async (body) => {
const response = await fetch("https://fakestoreapi.com/products", {
method: "post",
body: json.stringify(body),
});
return response.json();
},
});
const handlesubmit: formeventhandler<htmlformelement> = async (event) => {
event.preventdefault();
const form = event.target as htmlformelement;
const formdata = new formdata(form);
await mutate(
json.stringify({
title: formdata.get("title"),
price: formdata.get("price"),
description: formdata.get("description"),
category: formdata.get("category"),
image: formdata.get("image"),
}),
);
};
return (
<form
style={{ display: "flex", flexflow: "column", gap: 10 }}
onsubmit={handlesubmit}
>
<label htmlfor="name">title:</label>
<input type="text" id="title" name="title" />
<label htmlfor="price">price:</label>
<input type="number" id="price" name="price" />
<label htmlfor="description">description:</label>
<textarea id="description" name="description" />
<label htmlfor="image">image:</label>
<input type="url" id="image" name="image" />
<label htmlfor="category">category:</label>
<select id="category" name="category">
<option value="electronics">electronics</option>
<option value="jewelery">jewelery</option>
<option value="men's clothing">men's clothing</option>
<option value="women's clothing">women's clothing</option>
</select>
<button disabled={isloading} type="submit">
send
</button>
<div>error: {json.stringify(error)}</div>
<div>response: {json.stringify(data)}</div>
</form>
);
}
export default forms;
将请求移至您自己的钩子
// useproductcreate.tsx
import { usemutate } from "./usemutate.tsx";
async function fetchproductcreate(body) {
const response = await fetch("https://fakestoreapi.com/products", {
method: "post",
body: json.stringify(body),
});
return response.json();
}
export function useproductcreate() {
return usemutate({
mutation: (formdata: formdata) => {
const payload = {
title: formdata.get("title"),
price: formdata.get("price"),
description: formdata.get("description"),
category: formdata.get("category"),
image: formdata.get("image"),
};
return fetchproductcreate(payload);
},
});
}
// Form.tsx
import { FormEventHandler } from "react";
import { useProductCreate } from "../hooks/useProductCreate";
function Forms() {
const { data, mutate, isLoading, error } = useProductCreate();
const handleSubmit: FormEventHandler<HTMLFormElement> = async (event) => {
event.preventDefault();
const formData = new FormData(event.target as HTMLFormElement);
await mutate(formData);
};
return (
<form
style={{ display: "flex", flexFlow: "column", gap: 10 }}
onSubmit={handleSubmit}
>
<label htmlFor="name">Title:</label>
<input type="text" id="title" name="title" />
<label htmlFor="price">Price:</label>
<input type="number" id="price" name="price" />
<label htmlFor="description">Description:</label>
<textarea id="description" name="description" />
<label htmlFor="image">Image:</label>
<input type="url" id="image" name="image" />
<label htmlFor="category">Category:</label>
<select id="category" name="category">
<option value="electronics">electronics</option>
<option value="jewelery">jewelery</option>
<option value="men's clothing">men's clothing</option>
<option value="women's clothing">women's clothing</option>
</select>
<button disabled={isLoading} type="submit">
Send
</button>
<div>Error: {JSON.stringify(error)}</div>
<div>Response: {JSON.stringify(data)}</div>
</form>
);
}
export default Forms;
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