Load Components Dynamically React Js with load more button - reactjs

Question

I'm new to React Js, so I can't find a solution to my problem by myself, please help me.
I'm working on a website with a blog page, blogs should be displayed dynamically on the page. When page loads I want it to have 4 blogs, and underneath there will be button, so when the user clicks it, React should render and display the rest of the blogs.
My code so far looks like this:
import { blogs} from "./blogs";
import { Blog} from "./Blog";
function BlogList() {
const cardComponent = blogs.slice(0,6).map((blog, i) => {
return (
<Blog
key={i}
id={blogs[i].id}
img={blogs[i].img.src}
date={blogs[i].date}
title={blogs[i].title}
img2={blogs[i].img2.src}
logoTitle={blogs[i].logoTitle}
text={blogs[i].text}
/>
);
});
return (
<div>{cardComponent}</div>
)
}`````
**This code lets me display 6 blogs when the page is loaded, what I want to do is add "Load More" button under these already loaded 6 blogs, when the user clicks the button it should render and display another 4 blogs from "blogs", and again have Load More button.** Any help will be greatly appreciated,
Thank you.

Answer 1

Your code shows a fixed amount of blogs (6). Instead of hardcoding the amount of visible blogs, you need to store it in a variable that you can change later. We will use useState for this. You also need to change the amount of posts based on a button press, so a button and an action is also needed.
function BlogList() {
// Starting number of visible blogs
const [visibleBlogs, setVisibleBlogs] = useState(6)
// Set the visible blogs to the current amount + 4
// eg. if there are 10 visible post, clicking again will show 14.
const handleClick = () => {
setVisibleBlogs(prevVisibleBlogs => prevVisibleBlogs + 4)
}
const cardComponent = blogs.slice(0, visibleBlogs).map((blog, i) => {
return (
<Blog
key={i}
id={blogs[i].id}
img={blogs[i].img.src}
date={blogs[i].date}
title={blogs[i].title}
img2={blogs[i].img2.src}
logoTitle={blogs[i].logoTitle}
text={blogs[i].text}
/>
);
});
return (
<div>
{cardComponent}
<button type="button" onClick={handleClick}>
See more
</button>
</div>
)
}
I hope it helps.

Answer 2

You can do it this way:
function BlogList() {
const [maxRange, setMaxRange] = useState(6);
const loadMore = useCallback(() => {
setMaxRange(prevRange => prevRange + 4);
},[])
const cardComponent = blogs.slice(0, maxRange).map((blog, i) => {
return (
<Blog
key={i}
id={blogs[i].id}
img={blogs[i].img.src}
date={blogs[i].date}
title={blogs[i].title}
img2={blogs[i].img2.src}
logoTitle={blogs[i].logoTitle}
text={blogs[i].text}
/>
);
});
return (
<div>
{cardComponent}
<button onClick={loadMore}>Load More</button>
</div>
)
}
So you can just maintain the maximum number of currently displayed Blogs in state and increment it when the button gets clicked.
I used useCallback so that a new function doesn't get created when the component re-renders.