Learn how to create drawings with Vue.js and position them side by side

Question

Learn how to create drawings with Vue.js and position them side by side

I'm looking to place images next to each other within the same div. I've been able to draw the images successfully, but I am struggling with positioning them side by side.

Each time I draw an image, it is placed in the same div.

This is my HTML structure:

<div id="thumbnailImages">
    <canvas
        id="thumbnailImage"
    />
  </div>

Here is the code snippet:

 function thumbnail(video) {
  const canvasThumbnail = document.getElementById('thumbnailImage')
  const cth = canvasThumbnail.getContext('2d')

  const data = video.slice(8)
  imgToHTML(data, e => {
    const drawingThumbnail = new Image()
    drawingThumbnail.src = e.target.result
    drawingThumbnail.onload = function () {
      canvasThumbnail.width = 128
      canvasThumbnail.height = 128
      cth.drawImage(drawingThumbnail, 0, 0)
      document.getElementById('thumbnails').appendChild(canvasThumbnail)
    }
  })
}

I want to have multiple 'canvas' elements within the 'thumbnailImages' ID. Can you offer any assistance?

javascript vue.js

Answer 1

Answer №1

The problem arises from the repeated use of the same canvas element. To resolve this, it is important to generate a new canvas element for each iteration:

 function createThumbnail(video) {
  const thumbnailCanvas = document.createElement('canvas');
  const ctx = thumbnailCanvas.getContext('2d');

  const imageData = video.slice(8);
  
  convertImageToHTML(imageData, event => {
    const thumbnailImage = new Image();
    thumbnailImage.src = event.target.result;
    
    thumbnailImage.onload = function () {
      thumbnailCanvas.width = 128;
      thumbnailCanvas.height = 128;
      ctx.drawImage(thumbnailImage, 0, 0);
      document.getElementById('thumbnailImages').appendChild(thumbnailCanvas);
    }
  });
}

Answer 2

The problem arises from the repeated use of the same canvas element. To resolve this, it is important to generate a new canvas element for each iteration:

 function createThumbnail(video) {
  const thumbnailCanvas = document.createElement('canvas');
  const ctx = thumbnailCanvas.getContext('2d');

  const imageData = video.slice(8);
  
  convertImageToHTML(imageData, event => {
    const thumbnailImage = new Image();
    thumbnailImage.src = event.target.result;
    
    thumbnailImage.onload = function () {
      thumbnailCanvas.width = 128;
      thumbnailCanvas.height = 128;
      ctx.drawImage(thumbnailImage, 0, 0);
      document.getElementById('thumbnailImages').appendChild(thumbnailCanvas);
    }
  });
}

Learn how to create drawings with Vue.js and position them side by side

Answer №1

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