tests/bundles/umd-test-nolibrary.html

<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <title>test dist/bundles/index.esm.js</title>
  <meta name="viewport" content="width=device-width, initial-scale=1">
</head>

<body>
  <style>
    textarea{
    width: 100%; 
    height: 250px;
  }
  input{
    width: 100%
  }
  </style>

  <h1>Testing wasm-imagemagick.umd-es5.js without libraries </h1>

  <p>in this case, when no libraries are detected the global variable <code>['wasm-imagemagick']</code> is available, so you can use it like this: </p>

<pre>
const { execute, loadImageElement, buildInputFile } = window['wasm-imagemagick']
</pre>

  <div>
    <p>Image URL: </p>
    <input id="imageUrl" type="text" value="../rotate/FriedrichNietzsche.png">
  </div>
  <div>
    <p>Commands. </p>
    <textarea id="commandText">
convert FriedrichNietzsche.png -rotate 33 -resize 100x90! out.png
convert out.png -charcoal 1 charcoal1.gif
convert out.png -charcoal 2 charcoal2.gif
convert \
  charcoal1.gif \
  \( \
    -clone 0 charcoal2.gif -compose difference \
    -composite -threshold 5% -fill red \
    -opaque white -transparent black \
  \) \
  -compose over -composite \
  pcharcoaldiff.png
    </textarea>
  </div>

  <button id="execute">Execute</button>

  <div id="imagesContainer"></div>

  <script src="../../dist/bundles/wasm-imagemagick.umd-es5.js"></script>

  <script>

    const { execute, loadImageElement, buildInputFile } = window['wasm-imagemagick']

    async function renderImages(images) {
      document.querySelector('#imagesContainer').innerHTML = ''
      images.forEach(async imageFile => {
        const container = document.createElement('div')
        container.innerText = `"${imageFile.name}" : `
        const img = document.createElement('img')
        img.alt = img.title = imageFile.name
        container.appendChild(img)
        document.querySelector('#imagesContainer').appendChild(container)
        await loadImageElement(imageFile, img)
      })
    }

    async function main() {
      const input = await buildInputFile(document.querySelector('#imageUrl').value)
      const commands = document.querySelector('#commandText').value
      const result = await execute({ inputFiles: [input], commands })
      await renderImages([input].concat(result.outputFiles))
    }

    document.querySelector('#execute').addEventListener('click', main)

    main()
  </script>
</body>

</html>