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(null);
const [isloading, setisloading] = usestate(false);
const [error, seterror] = usestate(null);
const handlesubmit: formeventhandler = 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 (
);
}
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 = {
mutation: (args: a) => promise;
};
export function usemutate({ mutation }: usemutateparams) {
const [isloading, setisloading] = usestate(false);
const [error, seterror] = usestate(null);
const [data, setdata] = usestate(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 = async (e) => {
e.preventdefault();
await mutate(
json.stringify({
title,
price,
description,
category,
image,
}),
);
};
return (
);
}
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 = 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 (
);
}
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 = async (event) => {
event.preventDefault();
const formData = new FormData(event.target as HTMLFormElement);
await mutate(formData);
};
return (
);
}
export default Forms;








