How to use Aspose.CAD in JavaScript

Prerequisites

  • Visual Code + Live Server
  • Node.js

Convert dgn image to png and display in browser

In this example, you create a simple conversion program that converts a drawing and saves it as an image.

Creating the JavaScript

  1. Create package.json with aspose-cad dependencies 

    "dependencies": {
    "aspose-cad": "^23.1.0"
  },
 "devDependencies": {
    "live-server": "^1.2.1",
    "typescript": "^3.3.3333",
    "yarn": "^1.22.19"
  }

  2. Create index.html 

    <!DOCTYPE html>
Open console (Ctrl+Shift+I) to see the output.

<script src="./node_modules/aspose-cad/dotnet.js"></script>
<script type="module" src="./node_modules/aspose-cad/es2015/index-js.js"></script>

<body>
	<input id="file" type="file">
	<img id="image" />
</body>

<script>
window.onload = async function () {
	document.querySelector('input').addEventListener('change', function() {
      var reader = new FileReader();
      reader.onload = function() {
      
          var arrayBuffer = this.result;
          var array = new Uint8Array(arrayBuffer);
          
		  //GET_FILE_FORMAT
		  fileFormat = Aspose.CAD.Image.getFileFormat(array);
          console.log(fileFormat);
		  
		  // LOAD
		  file = Aspose.CAD.Image.load(array);
          console.log(file);
		  
		  // SAVE
		  exportedFilePromise = Aspose.CAD.Image.save(array, new Aspose.CAD.PngOptions());
		  exportedFilePromise.then(exportedFile => {
			console.log(exportedFile);
			
			var urlCreator = window.URL || window.webkitURL;
			var blob = new Blob([exportedFile], { type: 'application/octet-stream' });
            var imageUrl = urlCreator.createObjectURL(blob);
            document.querySelector("#image").src = imageUrl;
		  });
      }
	  
      reader.readAsArrayBuffer(this.files[0]);
    }, 
	false);
};
</script>

  3. Install the packages using the npm command 

    npm install

  4. Start application with Live Server or yarn 

    npm run serve

Execution example

  1. Choose file.
    Choose file
  2. Select any DXF, DWG, DGN, DWF, DWFX, IFC, STL, DWT, IGES, PLT, CF2, OBJ, HPGL, IGS, PCL, FBX, PDF, SVG file.
  3. If the answer is successful, the file will be displayed on the screen and will offer to download it.
    Convert image

See Also

How to use Aspose.CAD in Angular How to use Aspose.CAD in TypeScript