For example I have this code.
And I want to use CSS transitionfor Button when showButton and when !showButton. Now it's just removed and add Button when showButton changes.
{showButton && (
<Button
onClick={() => setShowMessage(true)}
size="lg"
>
Show Message
</Button>
)}
Is it possible make by some events or appending classNames like active?
Append the className with the ternary operator.
But, for example, this code will only adjust the class of the button specified (effectively doing the same thing you described, hiding & showing the button):
import React, { useState } from 'react';
export const Component = () => {
const [showButton, setShowButton] = useState(false);
const handleClick = () => {
setShowButton(true);
}
return (
<button
onClick={handleClick}
className={showButton ? 'showButtonClass' : 'hideButtonClass'}
>
Show Message
</button>
);
};
For content to show once the button is clicked, you'll need something like:
import React, { useState } from 'react';
export const Component = () => {
const [showMessage, setShowMessage] = useState(false);
const handleClick = () => {
setShowMessage(true);
}
return (
<div>
<button
onClick={handleClick}
>
Show Message
</button>
{showMessage && <h1>
The message you'll see when clicking!
</h1>}
</div>
);
};
Related
I am trying to create a system where I can easily click a given sentence on the page and have it toggle to a different sentence with a different color upon click. I am new to react native and trying to figure out the best way to handle it. So far I have been able to get a toggle working but having trouble figuring out how to change the class as everything is getting handled within a single div.
const ButtonExample = () => {
const [status, setStatus] = useState(false);
return (
<div className="textline" onClick={() => setStatus(!status)}>
{`${status ? 'state 1' : 'state 2'}`}
</div>
);
};
How can I make state 1 and state 2 into separate return statements that return separate texts + classes but toggle back and forth?
you can just create a component for it, create a state to track of toggle state and receive style of text as prop
in React code sandbox : https://codesandbox.io/s/confident-rain-e4zyd?file=/src/App.js
import React, { useState } from "react";
import "./styles.css";
export default function ToggleText({ text1, text2, className1, className2 }) {
const [state, toggle] = useState(true);
const className = `initial-style ${state ? className1 : className2}`;
return (
<div className={className} onClick={() => toggle(!state)}>
{state ? text1 : text2}
</div>
);
}
in React-Native codesandbox : https://codesandbox.io/s/eloquent-cerf-k3eb0?file=/src/ToggleText.js:0-465
import React, { useState } from "react";
import { Text, View } from "react-native";
import styles from "./style";
export default function ToggleText({ text1, text2, style1, style2 }) {
const [state, toggle] = useState(true);
return (
<View style={styles.container}>
<Text
style={[styles.initialTextStyle, state ? style1 : style2]}
onPress={() => toggle(!state)}
>
{state ? text1 : text2}
</Text>
</View>
);
}
This should be something you're looking for:
import React from "react"
const Sentence = ({ className, displayValue, setStatus }) => {
return (
<div
className={className}
onClick={() => setStatus((prevState) => !prevState)}
>
{displayValue}
</div>
);
};
const ButtonExample = () => {
const [status, setStatus] = React.useState(false);
return status ? (
<Sentence
className="textLine"
displayValue="state 1"
setStatus={setStatus}
/>
) : (
<Sentence
className="textLineTwo"
displayValue="state 2"
setStatus={setStatus}
/>
);
};
You have a Sentence component that takes in three props. One for a different className, one for a different value to be displayed and each will need access to the function that will be changing the status state. Each setter from a hook also has access to a function call, where you can get the previous (current) state value, so you don't need to pass in the current state value.
Sandbox
I'm trying to remove a CSS class from a specific item when clicking on that item's button. Removing the CSS class will make a menu appear. How would I go about doing this with React? Here's the code.
import "./Homepage.css"
import React, { useState, useEffect, useRef } from "react"
// import { FontAwesomeIcon } from "#fortawesome/react-fontawesome"
// import { faArrowDown } from "#fortawesome/free-solid-svg-icons"
import { Link } from "react-router-dom"
import useFetch from "./useFetch"
import Axios from "axios"
export default function Homepage() {
const [body, setBody] = useState("")
const [sortedData, setSortedData] = useState("")
const [data, setData] = useState("")
const [css, setCss] = useState("")
const [flash, setFlash] = useState(null)
const posts = useFetch("http://localhost:5000/api/data")
const firstRender = useRef(true)
useEffect(() => {
let test = JSON.parse(window.localStorage.getItem("user"))
console.log(test)
setData(posts)
}, [posts])
useEffect(() => {
if (firstRender.current) {
firstRender.current = false
return
}
data.sort(function (a, b) {
return new Date(b.date) - new Date(a.date)
})
setSortedData(data)
}, [data])
const handleSubmit = (e) => {
e.preventDefault()
Axios.post("http://localhost:5000/api/react-create-post", { text: body }, { withCredentials: true })
.then((res) => {
setSortedData((prevArray) => [res.data.post, ...prevArray])
setFlash("Successfully created post.")
setCss("success-msg")
setBody("")
})
.catch((err) => {
setCss("error-msg")
setFlash("Field cannot be left blank.")
})
}
const handleClick = (e) => {
e.preventDefault()
e.target.parentElement.children[1]
}
return (
<div>
<center>
<div className="create-container">
<div className="posts-title">Create Post</div>
<form id="theForm" onSubmit={(e) => handleSubmit(e)}>
<textarea onChange={(e) => setBody(e.target.value)} value={`${body}`} id="theInput" className="post-input" name="text" type="text"></textarea>
<button className="submit-btn">POST</button>
</form>
</div>
<div id="postsContainer" className="posts-container">
<div className="posts-title">Latest Posts</div>
{flash ? <div className={css}>{flash}</div> : console.log()}
<div id="postInput">
{sortedData &&
sortedData.map((item) => {
return (
<div className="post-container" key={item._id}>
<Link className="a" to={`/user/${item.author}`}>
<h3 className="author">{item.author}</h3>
</Link>
<div className="date">{item.date.toLocaleString()}</div>
<div className="options-cont">
<button onClick={(e) => handleClick(e)} id="optionsBtn" className="options-btn">
<i className="fas fa-ellipsis-v"></i>
</button>
<button data-author={`${item.author}`} data-id={`${item._id}`} data-text={`${item.body}`} id="editBtn" className="edit inside-btn invisible">
Edit
</button>
<button data-author={`${item.author}`} data-id={`${item._id}`} id="deleteBtn" className="delete inside-btn invisible">
Delete
</button>
<br></br>
</div>
<p className="body-text">{item.body}</p>
</div>
)
})}
</div>
</div>
</center>
</div>
)
}
As far as I'm concerned using state as the className would remove or alter the CSS of each item in the "sortedData" array and make the menus for all items appear. I only want the menu for one of the items to appear.
As pilchard said, you probably want to make each of those its own component with its own "showing" state, or at least "showing" prop.
As far as I'm concerned using state as the className would remove or alter the CSS of each item in the "sortedData" array and make the menus for all items appear. I only want the menu for one of the items to appear.
That would be true if you used a single flag in state. But instead, use a set of flags, one flag for each menu, perhaps keyed by item._id.
Assuming you don't do the refactoring pilchard (and I) suggest:
You haven't shown us enough code for me to know whether you're using class components or function components, so I'm going to guess function components with hooks. If so, the initial state would be:
const [showing, setShowing] = useState(new Set());
Then when rendering, you'd assign the class:
<theElement className={showing.has(item._id) ? "class-if-any-to-show-it" : "class-if-any-to-not-show-it" ...
To toggle, in the button pass the ID:
<button onClick={(e) => handleClick(e, item._id)}
and then update state as appropriate:
const handleClick = (e, id) => {
e.preventDefault()
setShowing(showing => {
showing = new Set(showing);
if (showing.has(id)) {
showing.delete(id);
} else {
showing.add(id);
}
return showing;
});
};
So basically I want when I press on the Button I want to Icon to disappear as well as Button. I have tried something but clearly, it is not working, so I would appreciate some help if possible
const Button = (props) => {
const[toggleIcon, setToggleIcon]=React.useState('true')
function Icon() {
toggleIcon(false)
}
return(
<div>
<button onClick={()=> setToggleIcon('false')}></button>
</div>
)
}
export default Button
const Icon = (props) => {
return(
<div>
<Icon>{props.Icon('false')}</Icon>
</div>
export default Icon
You can prevent a component from rendering by returning null. Use conditional rendering with the toggleIcon state as the condition. The onClick handler changes the state.
E.G.:
const Button = () => {
const [toggleIcon, setToggleIcon] = React.useState(true)
return toggleIcon ? (
<button onClick={() => setToggleIcon(false)}><Icon /></button>
) : null
}
export default Button
Take a look at the Conditional Rendering section of the React docs.
I am working with a form in react, and what I would like is that when I click a button, I add a new component which is just an input to the screen. It all mostly works, as planned. The issue is with the following: the layout is that I have one main component, which then displays a child component. That child component is called from a map of a useState. (More after code snippet)
This is the code of the main component:
import React, { useState } from "react";
import SingleProfile from "./individual_profile";
const ProfileInformation = (props) => {
console.log("proflie render");
const [ProfilesBoolean, setProfilesBoolean] = useState(false);
const [profiles, setProfiles] = useState(props.Data['profiles'])
const FieldAdd = (event)=>{
event.preventDefault();
const copy = profiles;
copy.push({Network:'',url:''})
return(copy)
}
function CreateInput(){
return profiles.map((data, index) =><SingleProfile index={index} data={data} />)
}
const accordion = (event) => {
const NextElement = event.target.nextElementSibling;
if (!event.target.className.includes("display")) {
NextElement.style.maxHeight = NextElement.scrollHeight + "px";
} else {
NextElement.style.maxHeight = 0;
}
};
return (
<div className="AccordionItem">
<div
className={
ProfilesBoolean ? "AccordionHeader-display" : "AccordionHeader"
}
onClick={(e) => setProfilesBoolean(!ProfilesBoolean)}
id="ProfileForm"
>
Profiles
</div>
<div className="AccordionContent">
<div className="AccordionBody">
{
profiles.map((data, index) => (
<SingleProfile index={index} data={data} />
))
}
<button id="ProfileAdd" onClick={(e) => {setProfiles(FieldAdd(e))}}>
Add a profile
</button>
</div>
</div>
</div>
);
};
export default ProfileInformation;
When I click the button and onClick fires FieldAdd() the useState updates, with a new empty object as expected. However, it does not appear inside my <div className="AccordionBody"> as I would expect it to.
The following code is used to display components, by opening and closing the child div. When it is open is when you see the child components and the add button. If I click the div, to close and then click again to re-open it, the new child component appears.
<div
className={ProfilesBoolean ? "AccordionHeader-display" : "AccordionHeader"}
onClick={(e) => setProfilesBoolean(!ProfilesBoolean)}
id="ProfileForm"
>
Profiles
</div>;
Is it possible to have the child component appear without having to close and re-open the div?
Your clickHandler FieldAdd is incorrect. You are mutating the state directly which will not cause re-render.
use setProfiles to update the state in the clickHandler. Like this
const FieldAdd = (event)=>{
setProfiles(prev => [...prev, {Network:'',url:''}])
}
Trigger the onClick like this
<button id="ProfileAdd" onClick={(e) => {FieldAdd(e)}}>
Add a profile
</button>
...
I have a Dropdown made with React Hooks. The button should have Arrow, which rotate. My first Version works fine:
const DropdownMenu= (props) => {
const [open, setOpen] = useState(false);
const openDropdown = (): void => setOpen(prevState => !prevState);
return (
<div>
<Button
onClick={openDropdown}
dropdownIsOpen={open}
>
Text </Button>
<DropdownContent isOpen={isOpen} />
</div>
);
};
export default DropdownMenu;
const Button = (props) => {
return (
<Button Click={props.onClick}>
Text
<Arrow rotate={props.dropdownIsOpen} color={designTheme.color.primary} />
</Button>
);
};
export default Button;
But now I have multiple Dropdowns and want to use them with the same component. I gave the toggleNode as prop. Now the Arrow rotate but without the transition:
const DropdownButton = (props) => {
const [isOpen, setOpen] = useState(false);
const onToggle = (): void => setOpen(prevState => !prevState);
return (
<Dropdown
isOpen={props.isOpen}
onToggle={onToggle}
toggleNode={
<Button dropdownIsOpen={isOpen}>
Text
</Button>
}
/>
);
};
export default DropdownButton;
Have someboy an idea?
Thank you!
my guess is, you are exporting different Button
How can you use Button inside Button, possibly by importing Button from somewhere else. And then you are again exporting Button. This will be confuse for transpiler, as which Button to be exported.
You might want to rename your custom Button to something else
const Button = (props) => {
return (
<Button Click={props.onClick}>
Text
<Arrow rotate={props.dropdownIsOpen} color={designTheme.color.primary} />
</Button>
);
};
export default Button;
Given your Button component takes an onClick prop:
const Button = (props) => {
return (
<Button Click={props.onClick}>
Text
<Arrow rotate={props.dropdownIsOpen} color={designTheme.color.primary} />
</Button>
);
};
NOTE: As #SagarMore points out, there my also be a naming collision between some imported Button component and your Button component.
You may just need to pass a callback to Click (terrible name, BTW, should be onClick, hopefully it was just a typo):
const DropdownButton = (props) => {
const [isOpen, setOpen] = useState(false);
const onToggle = (): void => setOpen(prevState => !prevState);
return (
<Dropdown
isOpen={props.isOpen}
onToggle={onToggle}
toggleNode={
<Button onClick={onToggle} dropdownIsOpen={isOpen}>
Text
</Button>
}
/>
);
};
Passing onToggle to the inner button's onClick handler should now toggle the isOpen state of the DropDown.
This was my fault.
In my Dropdown component I render two different states conditional. So it renders the start or the end state and don't use the animation. I have to render a animation and don't render new when I click so the animation works.