Paste a image to the canvas for full size

I have 640x692 jpg (Emperor_Penguin_Manchot_empereur.jpg). and I want to paste this in canvas.

So, I made the canvas

    const canvasRef = useRef();
    useEffect(() =>{
      var chara= new Image();
      chara.src = "http://localhost:8021/Emperor_Penguin_Manchot_empereur.jpg";

      chara.onload = () => {
        var ctx = canvasRef.current.getContext('2d');
        ctx.drawImage(chara,0,0,640,692,0,0,640,692);// paste the image as the same size.
    }

    return
    <canvas ref={canvasRef} style=></canvas>

this is the picture,

result

However with this script, it shows the only the part of this picture (left top).

I set the size of canvas and jpg as the same size.

Where am I wrong??

Via Active questions tagged javascript - Stack Overflow https://ift.tt/R5uPKkB

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