How do I expand div smoothly when new content is added - javascript

How do I make a div expand smoothly when content is added?
const [render, setRender] = useState(false)
const showHide= () => {
setRender(!render)
}
return (
<div className="container">
<h1>TEST CONTAINER</h1>
{render && <Paragprah />}
<button type="button" class="btn btn-primary" onClick={showHide}>Primary</button>
</div>
);
}
CSS
.container {
margin-left: 30%;
margin-top: 10%;
width: 500px;
height: auto;
background-color: whitesmoke;
}
In the above, a component is being rendered when a button is clicked, when the new content is added to the div, it expands instantly. basically, I would like it to expand smoothly when the content is added. Here is a video as well by what I mean when it expands instantly.
Setting a fixed height wont work in my situation because the content that's being loaded is dynamic, its coming from an API and the length is different everytime. So setting a fixed height will make the content overflow sometimes. I need a way where the transition can occur smoothly and the height still be large enough to fit the content, which would probably require ```height: auto;`` to be present?
Link to Imgur video

you can use the transition css property for a smooth transition.
transition: height 2s;
Follow this link for reference.

Here I updated the code. Since the content that's being loaded has dynamic size then you have to track that content size using useRef hook and store it on a variable and export it with your component.
import { useRef, useEffect} from "react";
var ParagraphHeight;
function Paragraph() {
const ref = useRef(null);
useEffect(() => {
//when you content is loaded store its height
ParagraphHeight = ref.current.offsetHeight;
}, []);
return (
<div ref={ref}>
<p>Your content here for exemple...</p>
</div>
);
}
export { Paragraph, ParagraphHeight };
Now import your Paragraph component and put it inside a .wrapper div that has a default height of 0px (that means your Paragraph will be hidden) and when you click on the button the height of it will change to the ParagraphHeight
import { useState } from "react";
import { Paragraph, ParagraphHeight } from "./Paragraph.js";
export default function App() {
const [isopned, setisopned] = useState(false);
const [wrapperHeight, setWH] = useState(0);
const showHide = () => {
if (!isopned) setWH(ParagraphHeight);
else setWH(0);
setisopned(!isopned);
};
return (
<div className="container">
<h1>TEST CONTAINER</h1>
<div className="wrapper" style={{ height: wrapperHeight }}>
<Paragraph />
</div>
<button type="button" className="btn btn-primary" onClick={showHide}>
Primary
</button>
</div>
);
}
Finally don't forget to update your css, add overflow-y hidden and css transition to to expand your wrapper div smoothly.
.container {
margin-left: 30%;
margin-top: 10%;
width: 500px;
background-color: whitesmoke;
}
.wrapper {
display: grid; /*to prevent some problem caused by overflow hidden*/
transition: height 1s linear;
background-color: wheat;
overflow-y: hidden;
}
This is a live exemple demo

Related

How to make the content slide smoothly together with the sidebar?[react]

When my sidebar transitions to width: 0, the content right next to it (on its right) doesn't slide with it. It's like the text waits for the sidebar to be done with its animation before it takes the sidebar's place, even though I set its transition as well.
I came up with a minimal reproducible example below:
//Sidebar.js
import './styles/Sidebar.css'
export const Sidebar = () => {
const [show, setShow] = useState(false);
const toggle = ()=>{
setShow(!show);
}
return (
<div>
<div id={'toggle-btn'}>
<button type='button' className='toggle-btn' onClick={toggle}>
toggle
</button>
</div>
<div style={{display:"flex"}}>
<aside className={'sidebar' + (show ? ' showSidebar':'')}>
<ul className='menuList'>
<li>Perfil</li>
<li>Estatísticas</li>
<li>Adicionar Itens</li>
<li>Procurar</li>
</ul>
</aside>
</div>
</div>
)
}
/*Sidebar.css*/
.sidebar {
width:100%;
overflow: hidden;
box-shadow: 0 8px 8px -4px ;
transform: translateX(0);
transition:all 1s ease;
height:100vh;
}
.showSidebar {
width:0;
}
//Dashboard.js
import './styles/Dashboard.css'
export const Dashboard = () => {
return (
<div className='dashboard'>
<p>
LORE IPSUM BLA BLA
</p>
</div>
)
}
/*Dashboard.css*/
.dashboard {
max-width: 30%;
margin-top:10rem;
transition:all 1s ease;
}
//App.js
function App() {
return (
<div style={{display:"flex"}}>
<Sidebar />
<Dashboard />
</div>
);
}
export default App;
When you change the Sidebar's width from 100% to 0, it simply is taken out of the content flow, and Dashboard then is reposition to left. To make Sidebar and Dashboard transition together while one of the two has width change, you need to establish a relationship between the two component's widths.
Please refer to this CodeSandbox example I put together for you.
In it, I set up a global CSS variable like below:
/* styles.css */
:root {
--sidebar: 150px;
}
And use it in both Sidebar and Dashboard like below:
/* Sidebar.css */
.sidebar {
width: var(--sidebar);
/* no other changes */
}
/* Dashboard.css */
.dashboard {
width: calc(100% - var(--sidebar));
/* no other changes */
}
With the above, whenever Sidebar's width changes, it'll reflect the value in Dashboard's width, making both transition in sync.

Update contents of a div element with animation styling

I'm building a personal portfolio webpage with React and I'm trying to update the content of the div element but when the elements are updated, I want to involve styling, (like the old content to exit on the left and the new content to enter from the left) Sorry for my bad English.
This is the part I'm trying to update and add styling
I've tried to use the componentDidMount method with a function that changes the heading but I don't know how to add animations/styling...
export default class Home extends Component {
skills_section_update = () => {
let heading = document.getElementById('heading');
const headings = [
{
head: 'Web Development'
},
{
head: 'Game Development'
}
];
const update_head = (index) => {
heading.innerText = headings[index].head;
};
update_head(1);
}
componentDidMount = () => {
setInterval(this.skills_section_update, 2000);
};
I'm new to React so any help would be much appreciated.
:)
I don't know if there are special methods to do this using React but I know that you can't animate the content of a DOM element using CSS. What I would recommend is to add the updated content in another DOM element next to your current div and then animate the two to make a nice transition.
You could, for example, do something like that:
.container {
width: 400px;
height: 400px;
border: #000 solid 1px;
position: relative;
overflow: hidden;
}
.content {
width: 100%;
height: 100%;
transition: all .25s ease-in-out;
}
.container:hover .content {
transform: translateY(-100%);
transition: all .25s ease-in-out;
}
.original {
background-color: wheat;
}
.next {
background-color: teal;
}
<div class="container">
<div class="content original">
Content 1
</div>
<div class="content next">
New content
</div>
</div>

Use styled-components to center React Bootstrap Modal

Is it possible to use styled-component to create a wrapper container containing React Bootstrap's Modal component in order to make the modal be both horizontally and vertically aligned?
Tried creating CenteredModal container as shown, but the .modal element does not appear to have the new styles applied to it.
import { Modal } from "react-bootstrap";
import styled from 'styled-components';
const CenteredModal = styled.div`
& .modal {
display: flex !important;
align-items: center;
}
`
interface MyModalProps {
isOpen: boolean,
onHide: () => void
}
export default function MyModal({
isOpen = false,
onHide,
}: MyModalProps) {
return (
<CenteredModal>
<Modal show={isOpen} onHide={onHide}>
<h1>Hello</h1>
</Modal>
</CenteredModal>
)
}
Because Modal of react-bootstrap isn't render inside CenteredModal, so your style can't affect it (You can open the browser developer tool to see, it should be rendered at the bottom of the html body not in the CenteredModal div element).
I saw react-bootstrap is already provides a centering method, is this what you want? you can take a look https://react-bootstrap.github.io/components/modal/
why not use centered prop ?
example :
<Modal
size="lg"
centered
>
Your new container just needs a little tweaking:
const CenteredModal = styled.div`
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}
`
You can use this syntax:
import { Modal } from "react-bootstrap";
import styled from 'styled-components';
const CenteredModal = styled(Modal)`
display: flex !important;
align-items: center;
`;

How to disable click events when execution is going on in React?

I have a screen
where I want to disable all the events when execution is going on.
When I click on the Execute button, an API is called which probably takes 4-5 minutes to respond. During that time, I don't want the user to click on the calendar cells or Month navigation arrows.
In short, I want to disable all the events on the center screen but not the left menu.
Is it possible to do that?
Yes sure, you can add a class with css pointer-events rule. Set it on the whole table and it will disable all events. Just add it when request starts and remove it when it ends. You can achieve that, by having a boolean variable isLoading in your state, or redux store and based on that add or remove the no-click class.
.no-click {
pointer-events: none;
}
You can use classic loading overlay box over your content when some flag (i.e. loading) is true.
Other way to do it is to use pointer-event: none in CSS. Use same flag to set class to your content block.
Here is a working example in codesanbox:
https://codesandbox.io/s/determined-dirac-fj0lv?file=/src/App.js
Here is code:
export default function App() {
const [loadingState, setLoadingState] = useState(false);
const [pointerEvent, setPointerEvent] = useState(false);
return (
<div className="App">
<div className="sidebar">Sidebar</div>
<div
className={classnames("content", {
"content-pointer-event-none": pointerEvent
})}
>
<button onClick={() => setLoadingState(true)}>
Show loading overlay
</button>
<button onClick={() => setPointerEvent(true)}>
Set pointer event in css
</button>
{loadingState && <div className="loading-overlay"></div>}
</div>
</div>
);
}
.App {
font-family: sans-serif;
text-align: center;
display: flex;
position: absolute;
width: 100%;
height: 100%;
}
.content {
flex: 1;
position: relative;
}
.loading-overlay {
position: absolute;
left: 0;
top: 0;
width: 100%;
height: 100%;
background: rgba(0, 0, 0, 0.4);
z-index: 1;
}
.content-pointer-event-none {
pointer-events: none;
}

How to fix position of one element in a flexbox?

I have 2 boxes: Panel and Sidebar, in a flexbox, with flex-direction: row and justify-content: space-between I am able to horizontally align them side by side with a gap in the middle.
Now I'd like to fix the right Sidebar position, i.e. when scrolling down, the Sidebar should always stay on top of the screen, regardless of the location of Panel. How can I do it with CSS?
Working example here: https://codesandbox.io/s/gallant-saha-zgmnw
Code here:
App.js:
import React from "react";
import "./App.scss";
import Panel from "./Panel";
import Sidebar from "./Sidebar";
export default function App() {
return (
<div className="App">
<Panel />
<Sidebar />
</div>
);
}
App.scss:
.App {
width: 1100px;
font-family: sans-serif;
text-align: center;
display: flex;
flex-direction: row;
justify-content: space-between;
}
Panel.js:
import React from "react";
import "./Panel.scss";
const Panel = () => {
return (
<>
<div className="panel">The main panel</div>
</>
);
};
export default Panel;
Sidebar.js:
import React from "react";
import "./Sidebar.scss";
const Sidebar = () => {
return (
<>
<div className="sidebar">The sidebar</div>
</>
);
};
export default Sidebar;
I modified your siderbar css.
I used position fixed as this will make the sidebar fixed in the viewport so as you scroll it will remain static.
.sidebar {
position: fixed; /* add this */
width: 200px;
height: 200px;
text-align: center;
border: 1px black solid;
left: 906px /* add this */
}
This produces the desired effect. Tested and works. Apologies, I have updated my answer.
add this css to .sidebar
position:fixed;
right: 10px;
also, you can add:
top: -- px
if you have Navbar.

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