Develop Reference

Save Form values in ReactJS using checkboxes

I created a form component using react hook forms. The component is composed from a group of checkboxes and a text input. The text input appears when user click on the last checkbox custom. The idea of this one is: when the user will click on it appears a text input and the user can add a custom answer/option. Ex: if user type test within the input then when the user will save the form, there should appear in an array test value, but custom text should't be in the array. In my application i don't have access to const onSubmit = (data) => console.log(data, "submit");, so i need to change the values within Component component. Now when i click on submit i get in the final array the custom value. Question: how to fix the issue described above?
const ITEMS = [
{ id: "one", value: 1 },
{ id: "two", value: 2 },
{ id: "Custom Value", value: "custom" }
];
export default function App() {
const name = "group";
const methods = useForm();
const onSubmit = (data) => console.log(data, "submit");
return (
<div className="App">
<FormProvider {...methods}>
<form onSubmit={methods.handleSubmit(onSubmit)}>
<Component ITEMS={ITEMS} name={name} />
<input type="submit" />
</form>
</FormProvider>
</div>
);
}
export const Component = ({ name, ITEMS }) => {
const { control, getValues } = useFormContext();
const [state, setState] = useState(false);
const handleCheck = (val) => {
const { [name]: ids } = getValues();
const response = ids?.includes(val)
? ids?.filter((id) => id !== val)
: [...(ids ?? []), val];
return response;
};
return (
<Controller
name={name}
control={control}
render={({ field, formState }) => {
return (
<>
{ITEMS.map((item, index) => {
return (
<>
<label>
{item.id}
<input
type="checkbox"
name={`${name}[${index}]`}
onChange={(e) => {
field.onChange(handleCheck(e.target.value));
if (index === ITEMS.length - 1) {
setState(e.target.checked);
}
}}
value={item.value}
/>
</label>
{state && index === ITEMS.length - 1 && (
<input
{...control.register(`${name}[${index}]`)}
type="text"
/>
)}
</>
);
})}
</>
);
}}
/>
);
};
demo: https://codesandbox.io/s/winter-brook-sml0ww?file=/src/Component.js:151-1600

Assuming that the goal is to keep all the selections in the same group field, which must be an array that logs the selected values in provided order, with the custom input value as the last item if specified, perhaps ideally it would be easier to calculate the values in onSubmit before submitting.
But since the preference is not to add logic in onSubmit, maybe an alternative option could be hosting a local state, run the needed calculations when it changes, and call setValue manually to sync the calculated value to the group field.
Forked demo with modification: codesandbox
import "./styles.css";
import { Controller, useFormContext } from "react-hook-form";
import React, { useState, useEffect } from "react";
export const Component = ({ name, ITEMS }) => {
const { control, setValue } = useFormContext();
const [state, setState] = useState({});
useEffect(() => {
const { custom, ...items } = state;
const newItems = Object.entries(items).filter((item) => !!item[1]);
newItems.sort((a, b) => a[0] - b[0]);
const newValues = newItems.map((item) => item[1]);
if (custom) {
setValue(name, [...newValues, custom]);
return;
}
setValue(name, [...newValues]);
}, [name, state, setValue]);
const handleCheck = (val, idx) => {
setState((prev) =>
prev[idx] ? { ...prev, [idx]: null } : { ...prev, [idx]: val }
);
};
const handleCheckCustom = (checked) =>
setState((prev) =>
checked ? { ...prev, custom: "" } : { ...prev, custom: null }
);
const handleInputChange = (e) => {
setState((prev) => ({ ...prev, custom: e.target.value }));
};
return (
<Controller
name={name}
control={control}
render={({ field, formState }) => {
return (
<>
{ITEMS.map((item, index) => {
const isCustomField = index === ITEMS.length - 1;
return (
<React.Fragment key={index}>
<label>
{item.id}
<input
type="checkbox"
name={name}
onChange={(e) =>
isCustomField
? handleCheckCustom(e.target.checked)
: handleCheck(e.target.value, index)
}
value={item.value}
/>
</label>
{typeof state["custom"] === "string" && isCustomField && (
<input onChange={handleInputChange} type="text" />
)}
</React.Fragment>
);
})}
</>
);
}}
/>
);
};

Ok, so after a while I got the solution. I forked your sandbox and did little changes, check it out here: Save Form values in ReactJS using checkboxes
Basically, you should have an internal checkbox state and also don't register the input in the form, because this would add the input value to the end of the array no matter if that value is "".
Here is the code:
import "./styles.css";
import { Controller, useFormContext } from "react-hook-form";
import { useEffect, useState } from "react";
export const Component = ({ name, ITEMS }) => {
const { control, setValue } = useFormContext();
const [state, setState] = useState(false);
const [checkboxes, setCheckboxes] = useState(
ITEMS.filter(
(item, index) => index !== ITEMS.length - 1
).map(({ value }, index) => ({ value, checked: false }))
);
useEffect(() => {
setValue(name, []); //To initialize the array as empty
}, []);
const [inputValue, setInputValue] = useState("");
const handleChangeField = (val) => {
const newCheckboxes = checkboxes.map(({ value, checked }) =>
value == val ? { value, checked: !checked } : { value, checked }
);
setCheckboxes(newCheckboxes);
const response = newCheckboxes
.filter(({ checked }) => checked)
.map(({ value }) => value);
return state && !!inputValue ? [...response, inputValue] : response;
};
const handleChangeInput = (newInputValue) => {
const response = checkboxes
.filter(({ checked }) => checked)
.map(({ value }) => value);
if (state) if (!!newInputValue) return [...response, newInputValue];
return response;
};
return (
<Controller
name={name}
control={control}
render={({ field, formState }) => {
return (
<>
{ITEMS.map((item, index) => {
return (
<>
<label>
{item.id}
<input
type="checkbox"
name={`${name}[${index}]`}
onChange={(e) => {
if (index === ITEMS.length - 1) {
setState(e.target.checked);
return;
}
field.onChange(handleChangeField(e.target.value));
}}
value={item.value}
/>
</label>
{state && index === ITEMS.length - 1 && (
<input
value={inputValue}
onChange={(e) => {
setInputValue(e.target.value);
field.onChange(handleChangeInput(e.target.value));
}}
type="text"
/>
)}
</>
);
})}
</>
);
}}
/>
);
};

How to filter items in a ResourceList

I am trying to filter ResourceItems in my ResourceList by their tag. For exmaple, if a user searches for the tag "Sports", all items with the this tag should be returned.
I have been utilising this example to produce this, but it doesn't actually have any functionality when the user enters a tag to filter by.
This is my code so far, in which I don't get any items back:
const GetProductList = () => {
// State setup
const [taggedWith, setTaggedWith] = useState(null);
const [queryValue, setQueryValue] = useState(null);
// Handled TaggedWith filter
const handleTaggedChange = useCallback(
(value) => setTaggedWith(value),
[],
);
const handleTaggedRemove = useCallback(() => setTaggedWith(null), []);
const handleQueryRemove = useCallback(() => setQueryValue(null), []);
const handleFilterClear = useCallback(() => {
handleTaggedRemove();
handleQueryRemove();
}, [handleQueryRemove, handleTaggedRemove]);
const filters = [
{
key:'taggedWith',
label:'Tagged With',
filter: (
<TextField
label="Tagged With"
value={taggedWith}
onChange={handleTaggedChange}
labelHidden
/>
),
shortcut: true,
}
];
const appliedFilters = !isEmpty(taggedWith)
? [
{
key: 'taggedWith',
label: disambiguateLabel('taggedWith', taggedWith),
onRemove: handleTaggedRemove,
},
]
: [];
const filterControl = (
<Filters
queryValue={queryValue}
filters={filters}
appliedFilters={appliedFilters}
onQueryChange={setQueryValue}
onQueryClear={handleQueryRemove}
onClearAll={handleFilterClear}
children={() => {
<div>Hello World</div>
}}
>
<div>
<Button onClick={() => console.log('New Filter Saved')}>Save</Button>
</div>
</Filters>
)
// Execute GET_PRODUCTS GQL Query
const { loading, error, data } = useQuery(GET_PRODUCTS);
if (loading) return "Loading products...";
if (error) return `Error = ${error}`;
// Return dropdown menu of all products
return (
<Frame>
<Page>
<Layout>
<Layout.Section>
<DisplayText size="large">WeBuy Valuation Tool</DisplayText>
</Layout.Section>
<Layout.Section>
<Card>
<Card.Section>
<div>
<Card>
<ResourceList
resourceName={{singular: 'product', plural: 'products'}}
items={data ? data.products.edges : ""}
renderItem={renderItem}
filterControl={filterControl}
>
</ResourceList>
</Card>
</div>
</Card.Section>
</Card>
</Layout.Section>
</Layout>
</Page>
</Frame>
)
function renderItem(item) {
const { id, title, images, tags } = item.node;
const media = (
<Thumbnail
source={ images.edges[0] ? images.edges[0].node.originalSrc : '' }
alt={ images.edges[0] ? images.edges[0].node.altText : '' }
/>
);
const resourceItem = (
<ResourceItem
id={id}
accessibilityLabel={`View details for ${title}`}
media={media}
>
<Stack>
<Stack.Item fill>
<h3><TextStyle variation="strong">{title}</TextStyle></h3>
<h2>{tags}</h2>
</Stack.Item>
<Stack.Item>
<AddMetafield id={id} />
<DeleteMetafield id={id} />
</Stack.Item>
</Stack>
</ResourceItem>
);
tags ? tags.forEach(tag => {
if (tag == "Sports") {
console.log("has tag")
return resourceItem
}
}) : console.log("Return")
}
function disambiguateLabel (key, value) {
switch(key) {
case 'taggedWith' :
return `Tagged with ${value}`;
default:
return value;
}
}
function isEmpty(value) {
if (Array.isArray(value)) {
return value.length === 0;
} else {
return value === '' || value == null;
}
}
}

I Couldn't find any documentation on how to implement this, and I expected it to be built-in, but I ended up doing something like this:
//add "filter.apply" function to the filter object
const filters = [{...apply:(c:Item)=>...},isApplied=...]
const appliedFilters = filters.filter(f=>f.isApplied);
let filteredItems = pageData.Items;
for (const filter of appliedFilters){
filteredItems = filteredItems.filter(filter.apply)
}
if(queryValue && queryValue.length > 0){
filteredItems = filteredItems.filter((c:FBComment)=>c.text.includes(queryValue))
}

How to re-render a callback function in ReactJS?

I'm making a filter function by checkbox. I made a reproduce like below. I changed values in array but checkbox checked status not change, what I missed? I think I must re-render list but it's also refill checked array to initial state. What should I do? Thanks!
import * as React from "react";
import "./styles.css";
import { Checkbox } from "antd";
const arr = [
{
name: "haha"
},
{
name: "haha2"
},
{
name: "hahaha"
}
];
const App = () => {
let [viewAll, setViewAll] = React.useState(true);
let checked = new Array(3).fill(true);
// render calendars checkbox
let list = arr.map((value, index) => {
return (
<Checkbox
style={{ color: "white" }}
checked={checked[index]}
onChange={() => handleFilter(value, index)}
className="check-box"
>
haha
</Checkbox>
);
});
const handleViewAll = () => {
setViewAll(!viewAll);
checked = checked.map(() => viewAll);
};
const handleFilter = (value, index) => {
setViewAll(false);
checked.map((_value, _index) => {
if (_index === index) {
return (checked[_index] = !checked[_index]);
} else {
return checked[_index];
}
});
console.log(checked);
};
return (
<div className="App">
<Checkbox checked={viewAll} onChange={() => handleViewAll()}>Check all</Checkbox>
{list}
</div>
);
};
export default App;
Here is codesanboxlink

You should create checked state. Check the code below.
let [viewAll, setViewAll] = React.useState(true);
let [checked, setChecked] = React.useState([true, true, true]);
// render calendars checkbox
let list = arr.map((value, index) => {
return (
<Checkbox
style={{ color: "black" }}
checked={checked[index]}
onChange={() => handleFilter(value, index)}
className="check-box"
>
{value.name}
</Checkbox>
);
});
const handleViewAll = () => {
setViewAll(!viewAll);
setChecked(() => checked.map(item => !viewAll));
};
const handleFilter = (value, index) => {
setViewAll(false);
setChecked(() =>
checked.map((_value, _index) => {
if (_index === index) return !checked[_index];
return checked[_index];
})
);
};
return (
<div className="App">
<Checkbox checked={viewAll} onChange={() => handleViewAll()}>
{checked}
</Checkbox>
{list}
</div>
);
codesandbox demo

You have to define checked array as a state value.
Right now your code is not firing render function because checked array is not props but also not state.

Filter on a list with headings and keep heading of filtered item(s)

I have a data set where each object has a heading and an items array with multiple values. I need to be able to filter on the items while maintaining their heading. The filter component below works without the headings. The data output I want is something like:
If I filter on 'ap...'
Output:
fruits
apple
const FilterList = () => {
const [searchTerm, setSearchTerm] = useState("")
const [searchResults, setSearchResults] = useState([])
const data = [
{
heading: 'fruits',
items: [
{ item: 'apple' },
{ item: 'orange' },
{ item: 'peach' }
]
},
{
heading: 'veggies'
items: [
{ item: 'carrot' },
{ item: 'broccoli' },
{ item: 'spinach' },
]
}
]
const handleChange = e => {
setSearchTerm(e.target.value)
}
useEffect(() => {
let results = []
if (data && Object.prototype.hasOwnProperty.call(data[0], "heading")) {
data.forEach(item => {
results = item.values.filter(value =>
value.value.toLowerCase().includes(searchTerm)
)
})
setSearchResults(results)
}
}, [searchTerm])
return (
<div>
<input
type="text"
placeholder={'placeholder}
value={searchTerm}
onChange={handleChange}
/>
<Typography>
<strong>{heading}</strong>
</Typography>
<List>
{searchResults.map((value, i) => (
<ListItem key={i}>
{value.value}
</ListItem>
))}
</List>
</div>
)
}

Modify the useEffect :
useEffect(() => {
console.log("changed");
const newSearchResults = data.map(value => ({
heading: value.heading,
items: value.items.filter(item => item.item.includes(searchTerm))
}));
setSearchResults(newSearchResults);
}, [searchTerm]);
Change your return to:
return (
<div>
<input
type="text"
placeholder={"placeholder"}
value={searchTerm}
onChange={handleChange}
/>
<div>
{searchResults.map(value => {
if (value.items.length !== 0) {
return (
<>
<Typography>
<strong>{value.heading}</strong>
</Typography>
<List>
{value.items.map((item, i) => (
<ListItem key={i}>{item.item}</ListItem>
))}
</List>
</>
);
}
})}
</div>
</div>

const data = [{heading:'fruits',items:[{item:'apple'},{item:'orange'},{item:'peach'}]},{heading:'veggies',items:[{item:'carrot'},{item:'broccoli'},{item:'spinach'},{item: 'peach'}]}]
const filterData = (data, val) => {
const result = []
data.forEach(obj => {
let r = obj.items.filter(item => item.item.includes(val))
if(r.length > 0) {
result.push({
...obj,
items: r
})
}
})
return result
}
console.log(filterData(data, "ap"))
console.log(filterData(data, "pe"))
Hope this helps.

Created a sandbox: https://codesandbox.io/s/strange-robinson-tvl7d?file=/src/App.js
Explanation
In essence, two changes are required:
need to restructure your searchResults to have the same structure as data, with heading and items. Instead of just pushing the items found, we specify the corresponding heading also, in the searchResults array
// new filtering function
useEffect(() => {
const results = [];
data.forEach(cate => {
const { heading, items } = cate;
// remains as is
const filterdItems = items.filter(item =>
item.item.toLowerCase().includes(searchTerm)
);
// only if filtered items are found
// add BOTH category & filtered items to results
if (filterdItems.length) {
results.push({
heading,
items: filterdItems
});
}
});
setSearchResults(results);
}, [searchTerm]);
And then, update the render block to loop through the categories array and then the items inside each category
// updated render
{
searchResults.map((resultCate, i) => {
return (
<div>
<strong>{resultCate.heading}</strong>
{resultCate.items.map((item, idx) => (
<div key={idx}>{item.item}</div>
))}
</div>
);
})}

update is not capturing and unable to update the input field

please find below code which contains name id and am rendering initially using map
am replacing id value to input type in UI
with the updated input type am trying to update the value onchange
update is not capturing and unable to update the input field
any suggestion?
please refer below snippet
import React, { useState } from "react";
const CstmInput = (props) => {
return (
<input
name={props.name}
type="text"
value={props.value}
onChange={(event) => props.onInputChange(event)}
/>
);
};
export default CstmInput;
import React, { useState } from "react";
import CstmInput from "./CstmInput";
const HierarcyTest = () => {
let rowData = [
{ name: "first", id: 10 },
{ name: "second", id: 20 },
];
const [data, setData] = useState(rowData);
const [name, setName] = useState({ fn: "test" });
const onInputChange = (e) => {
console.log("---event---", e.target.value);
setName({ ...name, fn: e.target.value });
};
let updateValue = () => {
let newData = data.map(
(item, index) =>
(item.id = (
<CstmInput name={item.name} value={item.id} onInputChange={(e) => onInputChange(e)} />
))
);
setData([...data, newData]);
};
return (
<div>
<div>Testing</div>
{data.map((val) => (
<h6>
{" "}
{val.name} {val.id}
</h6>
))}
<button onClick={updateValue}> Click </button>
</div>
);
};
export default HierarcyTest;

A few things why your code isn't working as intended:
1.
let updateValue = () => {
let newData = data.map((item, index) => {
if (item.id === 10) {
return [
(item.id = (
<CstmInput
value={item.id}
onInputChange={(e) => onInputChange(e)}
/>
)),
];
}
});
setData([...data, newData]);
};
In the above function inside the callback of map, you're only returning when a condition satisfies. Are you trying to filter the array instead? If not then return something when the if condition fails.
And why are you returning an array?
return [
(item.id = (
<CstmInput
value={item.id}
onInputChange={(e) => onInputChange(e)}
/>
)),
];
the above code seems logically wrong.
2.
const onInputChange = (e) => {
console.log("---event---", e.target.value);
setName({ ...name, fn: e.target.value });
};
If you want to update state which depends on the previous state then this is how you do it:
setName((prevState) => ({ ...prevState, fn: e.target.value }));
but since you're not actually relying on the properties of the previous state you can just use:
setName({fn: e.target.value });
Note that since your state only has one property and you want to update that single property you can completely overwrite the state, you don't need to spread the previous state.
update
change the updateValue function as the following:
let updateValue = () => {
setData(prevData => {
return prevData.map(el => {
return { ...el, id: <CstmInput value={el.id} onInputChange={(e) => onInputChange(e)} /> };
})
});
};
A stackblitz example I've created that implements what you're trying to do.