change value of input field react - html

Question

I have an input field in which I am pre populating the value of, with the value from the DB. it is a record that already exists, in which I would like to edit. The input field however, is not letting me edit the field. Please find it below:
import React, { useState, useEffect } from "react";
import axios from "axios";
import { useHistory } from "react-router-dom";
const EditServicesPage = () => {
const history = useHistory()
const [myData, setMyData] = useState({});
const [isLoading, setIsLoading] = useState(false);
const [showEditButton, setShowEditButton] = useState(false);
const [fields, setFields] = useState({
updatedByCNUM: "",
content: "",
site: ""
})
var idFromListServicesPage = history.location.state.id
console.log("22: " + idFromListServicesPage)
useEffect(() => {
axios
.post('/getDocToEdit', {id : idFromListServicesPage})
.then((res) => {
console.log("line 28 esp.js: " + res.data)
setMyData(res.data);
setIsLoading(true);
})
.catch((error) => {
// Handle the errors here
console.log(error);
})
.finally(() => {
setIsLoading(false);
});
}, []);
const deleteById = (id) => {
console.log(id);
axios
.post(`/deleteDoc`, { id: id })
.then(() => {
console.log(id, " worked");
window.location = "/admin/content";
})
.catch((error) => {
// Handle the errors here
console.log(error);
});
};
const handleInputChange = e => setFields(f => ({...f, [e.target.name]: e.target.value}))
const editById = (id, site, content, updatedByCNUM) => {
console.log(id, site, content, updatedByCNUM);
axios
.post(
'/editDoc',
({
id: id,
location: site,
content: content,
updatedByCNUM: updatedByCNUM
})
)
.then(() => {
console.log(id, " worked");
window.location = "/admin/content";
})
.catch((error) => {
console.log(error);
});
};
const onClickEdit = (e, _id) => {
e.preventDefault();
var site = document.getElementById("site").value;
var content = document.getElementById("content").value;
var updatedByCNUM = document.getElementById("updatedByCNUM").value;
console.log(site, content, updatedByCNUM)
editById(_id, site, content, updatedByCNUM);
};
const onTyping = (value) => {
if (value.length > 0) {
setShowEditButton(true);
} else {
setShowEditButton(false);
}
};
return (
<table id="customers">
<h1>Edit Services Page</h1>
<tr>
<th>site</th>
<th>content</th>
<th>updatedByCNUM</th>
<th>Actions</th>
</tr>
<tr>
<td>
<input
// ref={site.ref}
type="text"
value={myData.site}
onInput={(e) => onTyping(e.target.value)}
onChange={handleInputChange}
placeholder={myData.site}
name="site"
id="site"
/>{" "}
{/* <input
type="text"
placeholder={site}
onChange={(e) => onTyping(e.target.value)}
name="site"
id="site"
/> */}
</td>
<td>
<input
// ref={content.ref}
type="text"
value={myData.content}
onInput={(e) => onTyping(e.target.value)}
onChange={handleInputChange}
placeholder={myData.content}
name="content"
id="content"
/>
</td>
<td>
<input
type="text"
placeholder={myData.updatedByCNUM}
name="updatedByupdatedByCNUMhide"
id="updatedByupdatedByCNUMhide"
readOnly
/>{" "}
</td>
<td>
{/* <input type="hidden" placeholder={myData.updatedByCNUM} name="updatedByCNUM" id="updatedByCNUM" value={updatedByCNUM}/>{" "} */}
</td>
<td>
<button
onClick={(e) => {
e.preventDefault();
deleteById(idFromListServicesPage);
}}
disabled={isLoading}
>
Delete
</button>
<button
onClick={(e) => {
e.preventDefault();
editById(idFromListServicesPage);
}}
>
Edit
</button>
{showEditButton && (
<button onClick={(e) => onClickEdit(e, idFromListServicesPage)}>Submit Edit</button>
)}
</td>
</tr>
</table>
);
};
export default EditServicesPage;
showButton:
const onTyping = (value) => {
if (value.length > 0) {
setShowEditButton(true);
} else {
setShowEditButton(false);
}
};
when I try to type into the input field, it doesn't allow me to type, but keeps the pre existing value there already. how can I fix this?

Answer 1

You need a state which has the initial values from the DB
const [data, setData] = useState({
site: newData.site || "",
content: newData.content || "",
});
const handleInputChange = (e) => {
const { name, value } = e.target;
setData((currentData) => ({ ...currentData, [name]: value }));
};
return (
// .....
<input
// ref={site.ref}
type="text"
value={data.site} // use data.site here instead of the newData
onChange={handleInputChange}
placeholder={myData.site}
name="site"
id="site"
/>
// .....
);

Answer 2

Just add setMyData like this:
const onTyping = (name, value) => {
setMyData({ ...myData, [name]: value });
if (value.length > 0) {
setShowEditButton(true);
} else {
setShowEditButton(false);
}
};
And
onInput={(e) => onTyping(e.target.name, e.target.value)}