I want to console.log() multiple values from five different dropdowns on a button click. I have done this for one dropdown, but I don't know how to do it for more. I'm still a beginner.
Here's my code:
export default function Suma() {
const typedemande = [
{ value: "first", label: "first" },
{ value: "second", label: "second" },
];
const [message, setMessage] = useState('');
const handleChange = event => {
setMessage(event);
};
const handleClick = event => {
event.preventDefault();
console.log(message);
};
return (
<div>
<div className="col-lg">
<Select placeholder="choose" id="message" className="react-dropdown " name="message" onChange={handleChange}
value={message}
isClearable
isSearchable={false}
classNamePrefix="dropdown"
options={typedemande}
/>
</div>
<div className="text-center">
<button className="mr-2 btn btn-primary" onClick={handleClick}>Click me</button>
</div>
</div>
);
};
I hope you are looking for this one:
export default function App() {
const typedemande = [
{ value: "first", label: "first" },
{ value: "second", label: "second" },
{ value: "third", label: "third" },
{ value: "fourth", label: "fourth" },
{ value: "five", label: "five" },
];
const [showAll, setShowAll ] = useState([]);
const [dropdowns,setDrodowns] = useState({
'message1': '',
'message2': '',
'message3': '',
'message4': '',
'message5': '',
});
const handleChange = (event) => {
setDrodowns({...dropdowns,[event.target.name]:event.target.value});
}
const handleClick = (event) => {
event.preventDefault(); // if you use the element inside `form` then it would prevent to submit
console.log(dropdowns);//to log the values in console
setShowAll(Object.values(dropdowns));// to show the changes in UI
}
return (
<div>
<div className="col-lg">
<Select
name="message1"
onChange={handleChange}
value={"second"}
options={typedemande}
/>
<Select
name="message2"
onChange={handleChange}
value={"second"}
options={typedemande}
/>
<Select
name="message3"
onChange={handleChange}
value={"second"}
options={typedemande}
/>
<Select
name="message4"
onChange={handleChange}
value={"second"}
options={typedemande}
/>
<Select
name="message5"
onChange={handleChange}
value={"second"}
options={typedemande}
/>
</div>
<hr/>
<ul>
{ showAll.map((val,i)=><li key={i}>{i+1} --- {val}</li>) }
</ul>
<hr/>
<div className="text-center">
<button className="mr-2 btn btn-primary" onClick={handleClick}>Click me</button>
</div>
</div>
);
}
For details check the code sandbox link
Out put
Edit: Based on user comments I edited the answer
You could pass a parameter to your handleChange.
const handleChange = (event, position) => {
console.log(position);
};
<Select onChange={(e) => handleChange(e, 1)} />
<Select onChange={(e) => handleChange(e, 2)} />
<Select onChange={(e) => handleChange(e, 3)} />
Improving axtck's answer, you can get each select value like below
import React, {useState} from 'react';
import Select from 'react-select';
export function App(props) {
const typedemande = [
{ value: "first", label: "first" },
{ value: "second", label: "second" },
];
const [messages, setMessages] = useState([]);
const handleChange = (event, pos) => {
console.log(pos)
console.log(event.value)
let mz = [...messages];
if (mz.length > 0 && mz.findIndex(msg => msg.index == pos) > -1) {
mz[mz.findIndex(msg => msg.index == pos)] = event.value;
setMessages(mz);
}
else {
mz.push({
index: pos,
value: event.value
});
setMessages(mz);
}
};
const handleClick = event => {
event.preventDefault();
for (let i = 0; i < messages.length; i++)
console.log(messages[i].value)
};
return (
<div>
<div className="col-lg">
<Select placeholder="choose" id="message" className="react-dropdown " name="message" onChange={(e) => handleChange(e, 1)}
value={messages[0] ? messages[0].label : ''}
isClearable
isSearchable={false}
classNamePrefix="dropdown"
options={typedemande}
/>
<Select placeholder="choose" id="message" className="react-dropdown " name="message" onChange={(e) => handleChange(e, 2)}
value={messages[1] ? messages[1].label : ''}
isClearable
isSearchable={false}
classNamePrefix="dropdown"
options={typedemande}
/>
</div>
<div className="text-center">
<button className="mr-2 btn btn-primary" onClick={handleClick}>Click me</button>
</div>
</div>
);
}
Related
I am working on a page
have two sections. In one section we upload image and can increase the number of input, in the other section we will preview the image.
I don't know I am not getting the right id that I want to edit.
we can add more fields on click of button and remove then at the end post data at api endpoint?
RightSection
const RightSection = ({ inputImage, setInputImage }) => {
const handleAddFields = () => {
if (inputImage.length <= 9) {
const values = [...inputImage];
values.push({
id: values.length + 1,
name: `Drop Image ${values.length + 1} Here`,
});
setInputImage(values);
}
};
const handleRemoveFields = () => {
if (inputImage.length > 3) {
const values = [...inputImage];
values.splice(values.length - 1, 1);
setInputImage(values);
}
};
const handleInputChange = (id, event) => {
console.log(id, event.target.id, "=====");
const newInputFields = inputImage.map((i) => {
if (id === i.id) {
i.url = URL.createObjectURL(event.target.files[0]);
i.name = event.target.files[0].name;
// push image object in array
setInputImage([
...inputImage,
{
id: id,
url: URL.createObjectURL(event.target.files[0]),
name: event.target.files[0].name,
},
]);
}
return i;
});
setInputImage(newInputFields);
};
console.log(inputImage);
return (
<>
<div id="right" className="flex">
<div className="margin">
<div className="inlineflex">
<H1>Background Image</H1>
<div>
<AddIcon onClick={handleAddFields} />
<RemoveIcon onClick={handleRemoveFields} />
</div>
</div>
</div>
<div
style={{
margin: "0 auto",
position: "relative",
width: "80%",
}}
>
{inputImage.map((inputField, index) => (
<FileInput key={index}>
<label
htmlFor={inputField.id}
onClick={(e) => {
console.log("click", index + 1);
}}
>
{inputField.name}
</label>
<input
id={index + 1}
onChange={(event) => handleInputChange(inputField.id, event)}
accept="image/*"
type="file"
/>
</FileInput>
))}
</div>
</div>
</>
);
};
LeftSection
const LeftSection = ({ inputImage }) => {
return (
<>
<div id="left" className="flex">
<div className="margin">
<H1>Preview</H1>
</div>
<Grid>
{Array.isArray(inputImage) &&
inputImage.map((item, index) => {
if (item?.url?.includes("http") || item?.url?.includes("https")) {
return (
<div key={index}>
<img src={item?.url} alt={item?.name} />
</div>
);
}
})}
</Grid>
</div>
</>
);
};
BackgroundImage
let initaValue = [
{ id: 1, name: "Drop Image 1 Here", url: "" },
{ id: 2, name: "Drop Image 2 Here", url: "" },
{ id: 3, name: "Drop Image 3 Here", url: "" },
];
const BackgroundImage = () => {
const [inputImage, setInputImage] = useState(initaValue);
return (
<>
<Container>
<RightSection inputImage={inputImage} setInputImage={setInputImage} />
<LeftSection inputImage={inputImage} setInputImage={setInputImage} />
</Container>
</>
);
};
export default BackgroundImage;
I think there is some issue with the handleInputChange function on the RightSection component.
Somehow I am not able to update the item with the correct id in the array.
Is there any other efficient solution for this problem?
I have react select using sortable container the problem I am having is that the values that are extracted is like this
{
"fruits": [
{
"fruitName": {
"id": 3,
"value": "vanilla",
"label": "Vanilla"
}
},
{
"fruitName": {
"id": 1,
"value": "chocolate",
"label": "Chocolate"
}
}
]
}
if you notice that fruitName is duplicated each time I select an option despite that I don't need it I just want it like a list like this
{
"fruits": [
{
"id": 3,
"value": "vanilla",
"label": "Vanilla"
},
{
"id": 1,
"value": "chocolate",
"label": "Chocolate"
}
]
}
and if I remove fruitName field from field name it doesn't work correctly also how to pass initial values to this if I already have selected list values of fruits
import React from "react";
import Styles from "./Styles";
// import { render } from "react-dom";
import { Form, Field } from "react-final-form";
import arrayMutators from "final-form-arrays";
import { FieldArray } from "react-final-form-arrays";
import {
SortableContainer,
SortableElement,
SortableHandle,
} from "react-sortable-hoc";
import Select from "react-select";
const options = [
{ id: 1, value: "chocolate", label: "Chocolate" },
{ id:2, value: "strawberry", label: "Strawberry" },
{ id:3, value: "vanilla", label: "Vanilla" },
];
const DragHandle = SortableHandle(() => (
<span style={{ cursor: "move" }}>Drag</span>
));
const SortableItem = SortableElement(({ name, fields, value }) => (
<li>
<DragHandle />
<Field name={`${name}.fruittName`}>
{({ input }) => (
<Select options={options} placeholder="Select Location" {...input} />
)}
</Field>
<span onClick={() => fields.remove(value)} style={{ cursor: "pointer" }}>
Remove
</span>
</li>
));
const SortableList = SortableContainer(({ items }) => {
return (
<ul>
{items.map((name, index) => (
<SortableItem
key={`item-${index}`}
index={index}
value={index}
name={name}
fields={items}
/>
))}
</ul>
);
});
const sleep = (ms) => new Promise((resolve) => setTimeout(resolve, ms));
const onSubmit = async (values) => {
await sleep(300);
window.alert(JSON.stringify(values, 0, 2));
};
const sortEnd =
(move) =>
({ oldIndex, newIndex }) => {
move(oldIndex, newIndex);
};
const Home = () => {
return (
<div>
<Styles>
<h1>React Final Form - Array Fields</h1>
<a href="https://github.com/erikras/react-final-form#-react-final-form">
Read Docs
</a>
<Form
onSubmit={onSubmit}
mutators={{
...arrayMutators,
}}
render={({
handleSubmit,
form: {
mutators: { push, pop },
},
pristine,
reset,
submitting,
values,
}) => {
return (
<form onSubmit={handleSubmit}>
<div>
<label>Company</label>
<Field name="company" component="input" />
</div>
<div className="buttons">
<button
type="button"
onClick={() => push("fruits", undefined)}
>
Add Customer
</button>
<button type="button" onClick={() => pop("fruits")}>
Remove Customer
</button>
</div>
<FieldArray name="fruits">
{({ fields }) => (
<SortableList
useDragHandle={true}
items={fields}
onSortEnd={sortEnd(fields.move)}
/>
)}
</FieldArray>
<div className="buttons">
<button type="submit" disabled={submitting || pristine}>
Submit
</button>
<button
type="button"
onClick={reset}
disabled={submitting || pristine}
>
Reset
</button>
</div>
<pre>{JSON.stringify(values, 0, 2)}</pre>
</form>
);
}}
/>
</Styles>
</div>
);
};
export default Home;
This will help your answer,
If you don't want to repeat an object/value you have to just filter out it.
Below is an example,
fruits = [
{id: 1, name:'Mango'},
{id: 2, name:'Apple'},
{id: 3, name:'Orange'}
]
If your selected id is 2, So you want every other value except 2,
let selectedId = 2;
let filteredFruitArray = fruits.filter((fruit) => fruit.id !== selectedId);
console.log(filteredFruitArray); //{id: 1, name:'Mango'}{id: 3, name:'Orange'}
I need access to the formik props outside of the form.
While using refs, how can I avoid checking if a function exists before calling it?
function BasicInfo({ event, initialValues, onSubmit }: Props) {
const { coords } = useLocation();
const { data: places, forward, getStaticMapUrl } = useMapbox();
const { data: games, search, leanGame } = useGames();
const throttle = useThrottle();
const formRef = useRef<FormikProps<BasicInfoValues>>(null);
const initValues: BasicInfoValues = initialValues || {
title: '',
game: { name: '' },
address: '',
starts_at: '',
ends_at: '',
coords: '',
};
const { setFieldValue, values, handleChange } = formRef.current || {};
const handleEditLocationClick = function () {
if (!setFieldValue) return;
setFieldValue('address', '');
setFieldValue('coords', '');
};
const renderLocation = function () {
if (!values) return null;
const { coords: coordinates, address } = values;
if (coordinates && address) {
const staticMapUrl = getStaticMapUrl({
coords: JSON.parse(coordinates),
width: 600,
height: 165,
});
const { street, city } = parseAddress(address);
return (
<div className="basic-info__location">
<div className="basic-info__location__image-container">
<Image
src={staticMapUrl}
alt="static map"
layout="fill"
objectFit="fill"
/>
</div>
<div className="basic-info__location__address-container">
<div className="basic-info__location__address-container__address">
<span className="basic-info__location__street">{street}</span>
<span className="basic-info__location__city">{city}</span>
</div>
<Button
text="Edit location"
color="secondary"
size="small"
onClick={handleEditLocationClick}
/>
</div>
</div>
);
} else {
return (
<AutoComplete<Feature>
name="address"
value={values.address}
onChange={(e) => {
if (!handleChange) return;
handleChange(e);
throttle.wait(() => {
if (!e.target.value) return;
if (!coords) return;
forward({
coords,
q: e.target.value,
});
}, 500);
}}
label="Venue location"
placeholder="Search for a venue or address"
items={places}
Input={InputGroup}
itemRenderer={(item) => <AddressItem placeName={item.place_name} />}
onItemClick={(item) => {
if (!setFieldValue) return;
setFieldValue('address', item.place_name);
setFieldValue('coords', JSON.stringify(item.center));
}}
/>
);
}
};
return (
<Formik initialValues={initValues} onSubmit={onSubmit} innerRef={formRef}>
{({ values, handleChange, setFieldValue }) => (
<Form id="basic-info" className="basic-info">
<FormSection
title="Basic Info"
description="Name your event and tell gamers what game will be played. Add
details that highlight what makes it unique."
icon="segment"
>
<InputGroup
name="title"
value={values.title}
onChange={handleChange}
label="Event title"
placeholder="Be clear and descriptive"
/>
<AutoComplete<Game>
name="game.name"
value={values.game.name}
onChange={(e) => {
handleChange(e);
throttle.wait(() => {
if (!e.target.value) return;
search({ name: e.target.value, limit: 5 });
}, 500);
}}
label="Featured game"
placeholder="Search games"
Input={InputGroup}
items={games}
itemRenderer={(item) => <GameItem game={item} />}
onItemClick={(item) => {
const game = leanGame(item);
setFieldValue('game', game);
}}
/>
<span>
Need game ideas?{' '}
<Link href="/" passHref>
<a className="link">Browse games by category</a>
</Link>
</span>
</FormSection>
<FormSection
title="Location"
description="Help gamers in the area discover your event and let attendees know where to show up."
icon="map"
>
{renderLocation()}
</FormSection>
<FormSection
title="Date and time"
description="Tell gamers when your event starts and ends so they can make plans to attend."
icon="date_range"
>
<InputGroup
name="starts_at"
value={values.starts_at}
onChange={handleChange}
label="Event starts"
placeholder="Search for a venue or address"
type="datetime-local"
// icon="calendar_today"
/>
<InputGroup
name="ends_at"
value={values.ends_at}
onChange={handleChange}
label="Event ends"
placeholder="Search for a venue or address"
type="datetime-local"
// icon="calendar_today"
/>
</FormSection>
</Form>
)}
</Formik>
);
}
Specifically this function where I check if setFieldValue exists:
const handleEditLocationClick = function () {
if (!setFieldValue) return;
setFieldValue('address', '');
setFieldValue('coords', '');
};
There are other functions that also need formik props so I will have to do these checks. I guess I could pass in setFieldValue function as an argument to the handleEditLocationClick function, but that doesn't seem like a good practice.
You should not be using ref at all here. Just pass the render prop parameter down to your helper functions:
function BasicInfo({ event, initialValues, onSubmit }: Props) {
const { coords } = useLocation();
const { data: places, forward, getStaticMapUrl } = useMapbox();
const { data: games, search, leanGame } = useGames();
const throttle = useThrottle();
const initValues: BasicInfoValues = initialValues || {
title: '',
game: { name: '' },
address: '',
starts_at: '',
ends_at: '',
coords: '',
};
function renderLocation({ values, handleChange, setFieldValue }) {
const handleEditLocationClick = function () {
setFieldValue('address', '');
setFieldValue('coords', '');
};
const { coords: coordinates, address } = values;
if (coordinates && address) {
const staticMapUrl = getStaticMapUrl({
coords: JSON.parse(coordinates),
width: 600,
height: 165,
});
const { street, city } = parseAddress(address);
return (
<div className="basic-info__location">
<div className="basic-info__location__image-container">
<Image
src={staticMapUrl}
alt="static map"
layout="fill"
objectFit="fill"
/>
</div>
<div className="basic-info__location__address-container">
<div className="basic-info__location__address-container__address">
<span className="basic-info__location__street">{street}</span>
<span className="basic-info__location__city">{city}</span>
</div>
<Button
text="Edit location"
color="secondary"
size="small"
onClick={handleEditLocationClick}
/>
</div>
</div>
);
} else {
return (
<AutoComplete<Feature>
name="address"
value={values.address}
onChange={(e) => {
handleChange(e);
throttle.wait(() => {
if (!e.target.value) return;
if (!coords) return;
forward({
coords,
q: e.target.value,
});
}, 500);
}}
label="Venue location"
placeholder="Search for a venue or address"
items={places}
Input={InputGroup}
itemRenderer={(item) => <AddressItem placeName={item.place_name} />}
onItemClick={(item) => {
setFieldValue('address', item.place_name);
setFieldValue('coords', JSON.stringify(item.center));
}}
/>
);
}
}
return (
<Formik initialValues={initValues} onSubmit={onSubmit} innerRef={formRef}>
{({ values, handleChange, setFieldValue }) => (
<Form id="basic-info" className="basic-info">
<FormSection
title="Basic Info"
description="Name your event and tell gamers what game will be played. Add
details that highlight what makes it unique."
icon="segment"
>
<InputGroup
name="title"
value={values.title}
onChange={handleChange}
label="Event title"
placeholder="Be clear and descriptive"
/>
<AutoComplete<Game>
name="game.name"
value={values.game.name}
onChange={(e) => {
handleChange(e);
throttle.wait(() => {
if (!e.target.value) return;
search({ name: e.target.value, limit: 5 });
}, 500);
}}
label="Featured game"
placeholder="Search games"
Input={InputGroup}
items={games}
itemRenderer={(item) => <GameItem game={item} />}
onItemClick={(item) => {
const game = leanGame(item);
setFieldValue('game', game);
}}
/>
<span>
Need game ideas?{' '}
<Link href="/" passHref>
<a className="link">Browse games by category</a>
</Link>
</span>
</FormSection>
<FormSection
title="Location"
description="Help gamers in the area discover your event and let attendees know where to show up."
icon="map"
>
{renderLocation({ values, handleChange, setFieldValue })}
</FormSection>
<FormSection
title="Date and time"
description="Tell gamers when your event starts and ends so they can make plans to attend."
icon="date_range"
>
<InputGroup
name="starts_at"
value={values.starts_at}
onChange={handleChange}
label="Event starts"
placeholder="Search for a venue or address"
type="datetime-local"
// icon="calendar_today"
/>
<InputGroup
name="ends_at"
value={values.ends_at}
onChange={handleChange}
label="Event ends"
placeholder="Search for a venue or address"
type="datetime-local"
// icon="calendar_today"
/>
</FormSection>
</Form>
)}
</Formik>
);
}
I've created script for dynamic form, but there's 2 things which I can't get and my head is exploding right now, hopefully somebody would help me with that.
After creating new fields - I can't remove fields depends on button which was clicked.
And after removing some of those fields, I have this error with fieldsenter image description here
import React from "react";
import {useState , useEffect} from "react";
import ReactDOM from "react-dom";
import "./index.css";
const Form = () =>{
const [fieldsLength, fieldsLengthChanger] = useState(1);
const [fields, fieldsChanger] = useState([{
id : 1,
name: "",
phone: "",
age: ""
}])
return (
<>
<div className="form__wrapper">
<h2>Form </h2>
{
fields.map((elem, index) => {
return(
<FormElement {...elem} fields={fields} fieldsChanger={fieldsChanger} fieldsLength={fieldsLength} fieldsLengthChanger={fieldsLengthChanger}/>
)
})
}
<AddMore fieldsLength={fieldsLength} fieldsLengthChanger={fieldsLengthChanger} fields={fields} fieldsChanger={fieldsChanger}/>
</div>
</>
)
}
const FormElement = ({fieldsLength ,...props}) =>{
function inputHandler(e, id){
console.log(e.target.name);
const values = [...props.fields];
values[id-1][e.target.name] = e.target.value;
props.fieldsChanger(values);
}
function removeElement(e,id){
e.preventDefault();
var arr = [...props.fields];
const newArray = arr.filter(function(elem,index){
console.log("index:" , index, "ID : ", id);
if (index + 1 != id){
return elem;
}
});
// console.log(newArray);
// arr.splice(3, 1);
props.fieldsChanger([])
props.fieldsChanger(newArray);
}
return (
<div className="group__form">
<div className="form__element">
<input type="text" value={props.fields.name} name="name" onChange={e => inputHandler(e , props.id)} />
</div>
<div className="form__element">
<input type="text" value={props.fields.phone} name="phone" onChange={e => inputHandler(e , props.id)}/>
</div>
<div className="form__element">
<input type="text" value={props.fields.age} name="age" onChange={e => inputHandler(e , props.id)}/>
</div>
{
fieldsLength > 1 ? <div className="remove__field">
<a href="#" onClick={e=>removeElement(e , props.id)}>Remove</a>
</div> : ""
}
</div>
)
}
const AddMore = (props) =>{
function addMore(){
props.fieldsLengthChanger(props.fields.length + 1);
props.fieldsChanger([...props.fields, {id:props.fields.length + 1 , name: "" , phone : "" , age :''} ]);
}
return (
<div className="add__more">
<a href="#" onClick={e=> addMore()}>Add element</a>
</div>
)
}
ReactDOM.render(<Form/> , document.getElementById("root"));
Where I'm wrong - would be really helpfull to understand what is the problem
Always use key when rendering list.
<FormElement key={elem.id} {...elem} ...
https://reactjs.org/docs/lists-and-keys.html#keys
1. You should use the props.id to remove a form instead of using index.
e.g. this must be a bug.
if (index + 1 != id) {
return elem;
}
2. And you should use id by the unique value generation instead of using array's length.
3. You should provide the key prop in the render of the form fields. Otherwise, React can't distinguish forms in rendering.
And the key should be unique whenever you add or remove items.
e.g. See the updated code. You need to use elem.id. (Of course, you should generate id in the add method.
{fields.map((elem, index) => {
return (
<FormElement
key={elem.id}
{...elem}
fields={fields}
fieldsChanger={fieldsChanger}
fieldsLength={fieldsLength}
fieldsLengthChanger={fieldsLengthChanger}
/>
);
})}
4. You could basically use a timestamp. Please use your own generation logic in the production. You can use uuid generation package.
{
id: new Date().getTime(),
name: "",
phone: "",
age: ""
}
My advices:
You don't need to use this state variable const [fieldsLength, fieldsLengthChanger] = useState(1);
Because we can get this value by fields.length.
There are a few problems in terms of components design. e.g. Please try to define addMore() in form then you don't need to pass fields, fieldsChanger as props.
Here is a full working code with your old code commented.
const Form = () => {
const [fieldsLength, fieldsLengthChanger] = useState(1);
const [fields, fieldsChanger] = useState([
{
id: new Date().getTime(),
name: "",
phone: "",
age: ""
}
]);
return (
<>
<div className="form__wrapper">
<h2>Form </h2>
{fields.map((elem, index) => {
return (
<FormElement
key={elem.id}
{...elem}
fields={fields}
fieldsChanger={fieldsChanger}
fieldsLength={fieldsLength}
fieldsLengthChanger={fieldsLengthChanger}
/>
);
})}
<AddMore
fieldsLength={fieldsLength}
fieldsLengthChanger={fieldsLengthChanger}
fields={fields}
fieldsChanger={fieldsChanger}
/>
</div>
</>
);
};
const FormElement = ({ fieldsLength, ...props }) => {
function inputHandler(e, id) {
console.log(e.target.name);
const values = [...props.fields];
const item = values.find((x) => x.id === props.id);
if (item) {
item[e.target.name] = e.target.value;
}
// values[id - 1][e.target.name] = e.target.value;
props.fieldsChanger(values);
}
function removeElement(e, id) {
e.preventDefault();
var arr = [...props.fields];
const newArray = arr.filter(function (elem, index) {
/*console.log("index:", index, "ID : ", id);
if (index + 1 != id) {
return elem;
}*/
return elem.id !== id;
});
// console.log(newArray);
// arr.splice(3, 1);
props.fieldsChanger([]);
props.fieldsChanger(newArray);
}
return (
<div className="group__form">
<div className="form__element">
<input
type="text"
value={props.fields.name}
name="name"
onChange={(e) => inputHandler(e, props.id)}
/>
</div>
<div className="form__element">
<input
type="text"
value={props.fields.phone}
name="phone"
onChange={(e) => inputHandler(e, props.id)}
/>
</div>
<div className="form__element">
<input
type="text"
value={props.fields.age}
name="age"
onChange={(e) => inputHandler(e, props.id)}
/>
</div>
{fieldsLength > 1 ? (
<div className="remove__field">
<a href="#" onClick={(e) => removeElement(e, props.id)}>
Remove
</a>
</div>
) : (
""
)}
</div>
);
};
const AddMore = (props) => {
function addMore() {
props.fieldsLengthChanger(props.fields.length + 1);
props.fieldsChanger([
...props.fields,
//{ id: props.fields.length + 1, name: "", phone: "", age: "" }
{ id: new Date().getTime(), name: "", phone: "", age: "" }
]);
}
return (
<div className="add__more">
<a href="#" onClick={(e) => addMore()}>
Add element
</a>
</div>
);
};
I am developing a React JS web application where I have a form with four select fields (Make, Model, Min price and Max price) and a Search button. The data for search results will be fetched from API according to the selection of options. I want to show that data on another page in a card (page route path: /search) when user clicked on search button. I am using react router. The API url/end point is https://mysterious-journey-51969.herokuapp.com/api/search-vehicle/?q=mercedes&m=sprinter&pf=0&pt=100000 where "q" field matches Vehicle Make, "m" field matches Model, "pf" field matches Min Price, "pt" field matches Max Price. How I can do that?
Here is my Form component code:
import React, { Component } from 'react';
import { Form, FormGroup, Input } from 'reactstrap';
import { veh_data } from '../shared/vehicle_make_and_models';
const defaultValues = [
{ value: 0, text: 0, key: 1 },
{ value: 500, text: 500, key: 2 },
{ value: 1000, text: 1000, key: 3 },
{ value: 1500, text: 1500, key: 4 },
{ value: 2000, text: 2000, key: 5 },
{ value: 2000, text: 2000, key: 6 }
];
const MIN_TITLE = { selected: true, disabled: true, text: 'Min Price' };
const MAX_TITLE = { selected: true, disabled: true, text: 'Max Price' };
class ImgAndForm extends Component {
constructor(props) {
super(props);
this.handleSearch = this.handleSearch.bind(this);
this.keyToOption = this.keyToOption.bind(this);
this.renderOptions = this.renderOptions.bind(this);
this.handleModelChange = this.handleModelChange.bind(this);
this.state = {
minData: [MIN_TITLE, ...defaultValues],
maxData: [MAX_TITLE, ...defaultValues],
minValue: null,
maxValue: null,
modelSelected: null
};
}
renderOptions(data) {
return data.map(datum => {
// this allows us to indicate whether we are selecting or disabling
const selected = datum.selected || false;
const disabled = datum.disabled || false;
return (
<option key={datum.key} value={datum.value} selected={selected} disabled={disabled}>
{datum.text}
</option>
);
});
}
handleModelChange(event) {
console.log(event.target.value);
this.setState({ modelSelected: event.target.value });
}
handleSearch(event) {
alert("Search button clicked");
}
keyToOption(key) {
return key.split("-")
.map(word => word.slice(0, 1).toUpperCase() + word.slice(1))
.join(" ");
}
handleMinSelect = event => {
const value = event.target.value;
const newMaxValues = [];
defaultValues.forEach(datum => {
if (datum.value >= Number.parseInt(value, 10)) {
newMaxValues.push(datum);
}
});
this.setState({
maxData: [MAX_TITLE, ...newMaxValues],
minValue: value
});
};
handleMaxSelect = event => {
const value = event.target.value;
this.setState({ maxValue: value });
};
render() {
const vehicles = veh_data.reduce((acc, veh, i) => {
let make = Object.keys(veh)[0],
vehModels = veh[make];
return {
makes: [
...acc.makes,
<option key={make + i} value={make}>{this.keyToOption(make)}</option>
],
models: {
...acc.models,
[make]: vehModels.map((model, i) => {
return (
<option key={make + model + i} value={model}>
{this.keyToOption(model)}
</option>
);
})
}
};
}, { makes: [], models: [] });
const selectedModels =
this.state.modelSelected && this.state.modelSelected.length ? (
vehicles.models[this.state.modelSelected]
) : (
<option value="">Model (select make first)</option>
);
return (
<div>
<header className="headerbg d-flex">
<div className="container my-auto">
<div className="row">
<div className="offset-1 col-10 offset-lg-0 col-lg-4">
<div id="search-form-div" className="container">
<div className="row">
<div className="col-12 my-4">
<h3>Search</h3>
<Form onSubmit={this.handleSearch}>
<FormGroup>
<Input
onChange={e => this.handleModelChange(e)}
type="select"
name="q"
id="q"
>
<option value="">Make</option>
{vehicles.makes}
</Input>
</FormGroup>
<FormGroup>
<Input type="select" name="m" id="m">
{selectedModels}
</Input>
</FormGroup>
<FormGroup>
<Input type="select"
name="pf"
id="pf"
value={this.state.minValue}
onChange={this.handleMinSelect}>
{this.renderOptions(this.state.minData)}
</Input>
</FormGroup>
<FormGroup>
<Input
type="select"
name="pt"
id="pt"
value={this.state.maxValue}
onChange={this.handleMaxSelect}>
{this.renderOptions(this.state.maxData)}
</Input>
</FormGroup>
<FormGroup>
<Input type="submit" name="search" id="search" className="btn btn-primary" value="Search" />
</FormGroup>
</Form>
</div>
</div>
</div>
</div>
</div>
</div>
</header>
</div>
);
}
}
export default ImgAndForm;
Here is my Search result component code:
import React, { Component } from 'react';
import Smallheader from './SmallHeader';
import { Card, CardImg, CardTitle, CardSubtitle } from 'reactstrap';
class SearchResult extends Component {
constructor(props) {
super(props);
this.state = {
};
}
render() {
return (
<div>
<Smallheader />
<div className="my-5">
<div className="container text-center" id="contactContainer">
<div className="row">
<div className="col-lg-12 mx-auto">
<h2 className="text-center">Search Results</h2>
<hr className="my-4 thick-hr" />
</div>
</div>
<div className="row">
<div className="col-6 col-lg-3 mt-4">
<Card>
<a href="#">
<CardImg src="" className="img-fluid" />
<CardTitle>Title Here</CardTitle>
<CardSubtitle>Price Here</CardSubtitle>
</a>
</Card>
</div>
</div>
</div>
</div>
</div>
);
}
}
export default SearchResult;
Here is a working solution...
https://codesandbox.io/s/lrv2w3qxlq?moduleview=1
I've imported your SearchResults component and put it directly below your ImgAndForm, but you can move it anywhere in that render function.
For this specific situation you would need a way to render this on a new 'page' you would need a way to manage shared application state, like Redux or at least a container component as #MikeZinn mentioned, but to do that properly would require as significant amount of work to implement the routing and re-architect your entire program. (If you want I can show you a small hack to produce the same result without that for now, but I'd advise looking into a more permanent solution.)
Since the SearchResults component can be 'stateless' I removed the constructor function, but I left it as a class for now because this component will likely need state eventually.
I added the axios library to fetch the data from the API, but any other XHR module already used in your program will do.
NOTE: Since the specific API endpoints that your form is currently able to query are unavailable, I've hard coded the 'mercedes' example you provided, but the program will log both 'realQuery' and 'dummyQuery' so you see that it is producing the correct query structure for whenever you fix that.
Form Component
import React, { Component } from "react";
import { Form, FormGroup, Input } from "reactstrap";
// import { veh_data } from '../shared/vehicle_make_and_models';
import SearchResult from "./result";
import axios from "axios";
const veh_data = [
{ "alfa-romeo": ["145", "90", "Alfa 6", "Alfasud"] },
{ "aston-martin": ["15", "2-Litre", "AM Vantage", "Atom", "Cygnet", "DB2"] },
{ audi: ["100", "200", "A1", "A2", "A3", "A4", "A5", "A6", "A7"] }
];
const defaultValues = [
{ value: 0, text: 0, key: 1 },
{ value: 500, text: 500, key: 2 },
{ value: 1000, text: 1000, key: 3 },
{ value: 1500, text: 1500, key: 4 },
{ value: 2000, text: 2000, key: 5 },
{ value: 2000, text: 2000, key: 6 }
];
const MIN_TITLE = { selected: true, disabled: true, text: "Min Price" };
const MAX_TITLE = { selected: true, disabled: true, text: "Max Price" };
class ImgAndForm extends Component {
constructor(props) {
super(props);
this.handleSearch = this.handleSearch.bind(this);
this.keyToOption = this.keyToOption.bind(this);
this.renderOptions = this.renderOptions.bind(this);
this.handleModelChange = this.handleModelChange.bind(this);
this.state = {
minData: [MIN_TITLE, ...defaultValues],
maxData: [MAX_TITLE, ...defaultValues],
minValue: "",
maxValue: "",
modelSelected: "",
makeSelected: "",
searchResults: ""
};
}
renderOptions(data) {
return data.map(datum => {
// this allows us to indicate whether we are selecting or disabling
const selected = datum.selected || false;
const disabled = datum.disabled || false;
return (
<option
key={datum.key}
value={datum.value}
selected={selected}
disabled={disabled}
>
{datum.text}
</option>
);
});
}
handleModelChange(event) {
console.log(event.target.value);
this.setState({ modelSelected: event.target.value });
}
handleMakeChange(event) {
console.log(event.target.value);
this.setState({ makeSelected: event.target.value });
}
async handleSearch(event) {
event.preventDefault();
alert("Search button clicked");
let { makeSelected, modelSelected, minValue, maxValue } = this.state;
let realQuery =
"https://mysterious-journey-51969.herokuapp.com/api/search-vehicle/?" +
`q=${makeSelected.split("-").join("")}` +
`&m=${modelSelected.split("-").join("")}` +
`&pf=${minValue}` +
`&pt=${maxValue}`;
let dummyQuery =
"https://mysterious-journey-51969.herokuapp.com/api/search-vehicle/?q=mercedes&m=sprinter&pf=0&pt=100000";
console.log("realQuery (was not run)", realQuery);
console.log("dummyQuery (was run)", dummyQuery);
let res = await axios.get(dummyQuery).catch(err => console.log(err));
console.log("res", res.data);
if (res && res.data) {
this.setState(prevState => {
return {
...prevState,
searchResults: res.data
};
});
}
}
keyToOption(key) {
return key
.split("-")
.map(word => word.slice(0, 1).toUpperCase() + word.slice(1))
.join(" ");
}
handleMinSelect = event => {
const value = event.target.value;
const newMaxValues = [];
defaultValues.forEach(datum => {
if (datum.value >= Number.parseInt(value, 10)) {
newMaxValues.push(datum);
}
});
this.setState({
maxData: [MAX_TITLE, ...newMaxValues],
minValue: value
});
};
handleMaxSelect = event => {
const value = event.target.value;
this.setState({ maxValue: value });
};
render() {
const vehicles = veh_data.reduce(
(acc, veh, i) => {
let make = Object.keys(veh)[0],
vehModels = veh[make];
return {
makes: [
...acc.makes,
<option key={make + i} value={make}>
{this.keyToOption(make)}
</option>
],
models: {
...acc.models,
[make]: vehModels.map((model, i) => {
return (
<option key={make + model + i} value={model}>
{this.keyToOption(model)}
</option>
);
})
}
};
},
{ makes: [], models: [] }
);
const selectedModels =
this.state.makeSelected && this.state.makeSelected.length ? (
vehicles.models[this.state.makeSelected]
) : (
<option value="">Model (select make first)</option>
);
return (
<div>
<header className="headerbg d-flex">
<div className="container my-auto">
<div className="row">
<div className="offset-1 col-10 offset-lg-0 col-lg-4">
<div id="search-form-div" className="container">
<div className="row">
<div className="col-12 my-4">
<h3>Search</h3>
<Form onSubmit={this.handleSearch}>
<FormGroup key={1}>
<Input
onChange={e => this.handleMakeChange(e)}
type="select"
name="q"
id="q"
>
<option value="">Make</option>
{vehicles.makes}
</Input>
</FormGroup>
<FormGroup key={2}>
<Input
onChange={e => this.handleModelChange(e)}
type="select"
name="m"
id="m"
>
{selectedModels}
</Input>
</FormGroup>
<FormGroup key={3}>
<Input
type="select"
name="pf"
id="pf"
value={this.state.minValue}
onChange={this.handleMinSelect}
>
{this.renderOptions(this.state.minData)}
</Input>
</FormGroup>
<FormGroup key={4}>
<Input
type="select"
name="pt"
id="pt"
value={this.state.maxValue}
onChange={this.handleMaxSelect}
>
{this.renderOptions(this.state.maxData)}
</Input>
</FormGroup>
<FormGroup key={5}>
<Input
type="submit"
name="search"
id="search"
className="btn btn-primary"
value="Search"
/>
</FormGroup>
</Form>
<SearchResult results={this.state.searchResults} />
</div>
</div>
</div>
</div>
</div>
</div>
</header>
</div>
);
}
}
export default ImgAndForm;
Results Component
import React, { Component } from "react";
// import Smallheader from './SmallHeader';
import { Card, CardImg, CardTitle, CardSubtitle } from "reactstrap";
class SearchResult extends Component {
renderResults() {
let { results } = this.props;
console.log("results", results);
if (results && results.length) {
return results.map(({ price, text, title, remote_image }, i) => {
return (
<Card key={"card-" + i}>
<a href="#">
<CardImg src={remote_image} className="img-fluid" />
<CardTitle>{title}</CardTitle>
<CardSubtitle>{price}</CardSubtitle>
</a>
</Card>
);
});
}
}
render() {
return (
<div>
{/* <Smallheader /> */}
<div className="my-5">
<div className="container text-center" id="contactContainer">
<div className="row">
<div className="col-lg-12 mx-auto">
<h2 className="text-center">Search Results</h2>
<hr className="my-4 thick-hr" />
</div>
</div>
<div className="row">
<div className="col-6 col-lg-3 mt-4">{this.renderResults()}</div>
</div>
</div>
</div>
</div>
);
}
}
export default SearchResult;
This is exactly the type of problem Redux Solves without using Redux you will need to store the state on a shared parent component. For example,
class Search extends Component {
state = {
searchResult: null,
};
handleSearch = searchResult => {
this.setState({
searchResult,
});
}
render(){
const { searchResult, } = this.state;
if(searchResult === null){
return (
<ImgAndForm handleSearch={this.handleSearch} />
);
}
return (
<SearchResult searchResult={searchResult} />
);
}
}