I am working on a react project, where I want to conditionally render a div above an existing div that currently covers the screen with an image. I would like the existing div to reduce in height, by shrinking the size of the image, when the second div conditionally renders. The second div can have a varied height. ( e.g. list of items).
This is simplified version of what I have in my App so far:
function App() {
const [show, setShow] = useState(false);
return (
<div
style={{
border: "solid",
width: "100%",
maxHeight: "100vh"
}}
>
{show && (
<div>
<div style={{ height: "300px", backgroundColor: "red" }}></div>
<button
onClick={() => {
setShow(false);
}}
>
Close
</button>
</div>
)}
<div
style={{
display: "flex",
justifyContent: "center"
}}
>
<img
src="https://i.imgur.com/LiAUjYw.png"
alt="test"
style={{
maxWidth: "100%",
height: "auto"
}}
/>
</div>
<button onClick={() => setShow(true)}>SHow</button>
</div>
);
}
It initially looks like this: https://imgur.com/a/R0e74Xk
And on clicking the 'Show' button, it looks like this: https://imgur.com/a/Iy6osio
As you can see the bottom div gets shifted down, and goes over the container div.
I was wondering how I can make the div responsive enough to change its height when the other element is rendered.
I am fairly new to styling so any help on this would be greatly appreciated.
Thank you.
Here's one simple idea. See how the style is given to the divs like so:
<div
style={{
display: "flex",
justifyContent: "center"
}}
>
Note how the style has this weird {{ }} notation. That's because style accepts an object, and the object here is:
{
display: "flex",
justifyContent: "center"
}
You could take that object and save it as a variable somewhere, for example:
const styleWhenShow = {
display: "flex",
justifyContent: "center",
height: "100px"
}
const styleWhenNoShow = {
display: "flex",
justifyContent: "center",
height: "500px"
}
Since you already have your show state, now it's just a matter of replacing the style prop with:
style={show ? styleWhenShow : styleWhenNoShow}
In case you don't want to repeat some common styles between the show and noshow styles, you can also do something like:
const commonStyle = {
display: "flex",
justifyContent: "center"
}
const styleWhenShow = {
height: "100px"
}
const styleWhenNoShow = {
height: "500px"
}
And set the style prop like:
style={show ? { ...commonStyle, ...styleWhenShow } : { ...commonStyle, ...styleWhenNoShow }}