How to Use react-blurhash Without Knowing Exact Width and Height of the Placeholder

Question

Can someone help me with the code and example of  How to Use React-blurhash Without Knowing Exact Width and Height of the Placeholder?

Answer 1

To use react-blurhash without knowing the exact width and height of the placeholder, you can dynamically calculate the dimensions based on the container size or use CSS to make the placeholder responsive. Here's how:

Steps to Use react-blurhash Without Exact Dimensions
Install react-blurhash:
Install the library: npm install react-blurhash.

Use a Container with Dynamic Dimensions:
Wrap the Blurhash component in a container (e.g., div) and use CSS to make it responsive.

Calculate Dimensions Dynamically:
Use a ref or ResizeObserver to get the container's dimensions and pass them to the Blurhash component.

Example Code
import React, { useRef, useState, useEffect } from "react";
import { Blurhash } from "react-blurhash";
const BlurhashPlaceholder = ({ hash }) => {
  const containerRef = useRef(null);
  const [dimensions, setDimensions] = useState({ width: 0, height: 0 });
  useEffect(() => {
    const updateDimensions = () => {
      if (containerRef.current) {
        const { width, height } = containerRef.current.getBoundingClientRect();
        setDimensions({ width, height });
      }
    };
    // Update dimensions on mount and window resize
    updateDimensions();
    window.addEventListener("resize", updateDimensions);
    // Cleanup
    return () => window.removeEventListener("resize", updateDimensions);
  }, []);
  return (
    <div
      ref={containerRef}
      style={{ width: "100%", height: "100%", position: "relative" }}
    >
      <Blurhash
        hash={hash}
        width={dimensions.width}
        height={dimensions.height}
        resolutionX={32}
        resolutionY={32}
        punch={1}
      />
    </div>
  );
};
export default BlurhashPlaceholder;