How to properly load images to canvas in react.js?

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by dana , in category: Javascript , 4 months ago

How to properly load images to canvas in react.js?

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1 answer

by elise_daugherty , 4 months ago

@dana 

To properly load images to a canvas in React.js, you can follow these steps:

  1. Import the image file in your React component:
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import imageSrc from './path/to/image.jpg';


  1. Create a new Image object and set its src property to the imported image file:
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const image = new Image();
image.src = imageSrc;


  1. Once the image is loaded, draw it on the canvas using the drawImage() method:
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const canvasRef = useRef(null);

useEffect(() => {
  const canvas = canvasRef.current;
  const ctx = canvas.getContext('2d');
  
  image.onload = () => {
    ctx.drawImage(image, 0, 0);
  };
}, []);


  1. Render the canvas element in your component's JSX:
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<canvas ref={canvasRef} width={image.width} height={image.height} />


This code will load the image onto the canvas once it's fully loaded. Make sure to replace './path/to/image.jpg' with the actual path to your image file.