What is the best way to smoothly enlarge a div as new content is introduced?

Question

What is the best way to smoothly enlarge a div as new content is introduced?

Is there a way to smoothly expand a div when new 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 code above, a component is rendered when a button is clicked. However, when new content is added to the div, it expands instantly instead of smoothly. I need the expansion to be gradual. Click here to see an example video. A fixed height won't work for me as the content comes from an API and varies in length each time. Any suggestions on achieving a smooth transition while still accommodating dynamic content?

javascript html css reactjs

Answer 1

Answer №1

To achieve a seamless transition effect, consider utilizing the CSS property 'transition'.

transition: opacity 0.5s;

For additional guidance, check out this helpful resource.

Answer 2

To achieve a seamless transition effect, consider utilizing the CSS property 'transition'.

transition: opacity 0.5s;

For additional guidance, check out this helpful resource.

Answer 3

Answer №2

Here is an updated version of the code that handles content with dynamic sizes. To track the size of the content being loaded, utilize the useRef hook to store this information in a variable and export it along with your component.

import { useRef, useEffect} from "react";

var ParagraphHeight;

function Paragraph() {
  const ref = useRef(null);

  useEffect(() => {
    // Store the height of the loaded content
    ParagraphHeight = ref.current.offsetHeight;
  }, []);

  return (
    <div ref={ref}>
      <p>Your content here for example...</p>
    </div>
  );
}

export { Paragraph, ParagraphHeight };

To implement this, import your Paragraph component and place it inside a .wrapper div with a default height of 0px (making the Paragraph hidden). Clicking on a button will then adjust the height of the wrapper to the ParagraphHeight value.

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>
  );
}

Ensure to update your CSS by adding overflow-y: hidden and a CSS transition to smoothly expand the wrapper div.

.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;
}

Check out the live demo here

Answer 4

Here is an updated version of the code that handles content with dynamic sizes. To track the size of the content being loaded, utilize the useRef hook to store this information in a variable and export it along with your component.

import { useRef, useEffect} from "react";

var ParagraphHeight;

function Paragraph() {
  const ref = useRef(null);

  useEffect(() => {
    // Store the height of the loaded content
    ParagraphHeight = ref.current.offsetHeight;
  }, []);

  return (
    <div ref={ref}>
      <p>Your content here for example...</p>
    </div>
  );
}

export { Paragraph, ParagraphHeight };

To implement this, import your Paragraph component and place it inside a .wrapper div with a default height of 0px (making the Paragraph hidden). Clicking on a button will then adjust the height of the wrapper to the ParagraphHeight value.

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>
  );
}

Ensure to update your CSS by adding overflow-y: hidden and a CSS transition to smoothly expand the wrapper div.

.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;
}

Check out the live demo here

What is the best way to smoothly enlarge a div as new content is introduced?

Answer №1

Answer №2

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