The conundrum of jsPDF's image compatibility

Question

The conundrum of jsPDF's image compatibility

I am attempting to generate a PDF document on the client-side using the jsPDF library. The code I have written is as follows:

<script type="text/javascript" src="libs/base64.js"></script>
<script type="text/javascript" src="libs/sprintf.js"></script>
<script type="text/javascript" src="jspdf.js"></script>

<script>
var doc = new jsPDF();
var imgData = 'data:image/png;base64,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';
doc.setFontSize(40);
doc.text(30, 20, 'Hello world!');
doc.output('datauri');
doc.addImage(imgData, 'JPEG', 15, 40, 200, 114);
</script>

However, it seems that only the text is being printed and not the image.
What could be causing this issue?

javascript jspdf

Answer 1

Answer №1

To incorporate a png image, you will need to acquire the most up-to-date version of jspdf.js and integrate the necessary png libraries.

<script type="text/javascript" src="libs/png_support/zlib.js"></script>
<script type="text/javascript" src="libs/png_support/png.js"></script>
<script type="text/javascript" src="jspdf.plugin.addimage.js"></script>
<script type="text/javascript" src="jspdf.plugin.png_support.js"></script>
<script type="text/javascript" src="jspdf.js"></script>

Next, adjust the format to 'PNG' within the script.

<script>
    var doc = new jsPDF();
    var imgData = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAMgAAABy...
    doc.setFontSize(40);
    doc.text(30, 20, 'Hello world!');
    doc.addImage(imgData, 'PNG', 15, 40, 200, 114);
    doc.output('datauri');
</script>

Answer 2

To incorporate a png image, you will need to acquire the most up-to-date version of jspdf.js and integrate the necessary png libraries.

<script type="text/javascript" src="libs/png_support/zlib.js"></script>
<script type="text/javascript" src="libs/png_support/png.js"></script>
<script type="text/javascript" src="jspdf.plugin.addimage.js"></script>
<script type="text/javascript" src="jspdf.plugin.png_support.js"></script>
<script type="text/javascript" src="jspdf.js"></script>

Next, adjust the format to 'PNG' within the script.

<script>
    var doc = new jsPDF();
    var imgData = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAMgAAABy...
    doc.setFontSize(40);
    doc.text(30, 20, 'Hello world!');
    doc.addImage(imgData, 'PNG', 15, 40, 200, 114);
    doc.output('datauri');
</script>

Answer 3

Answer №2

To add these functionalities to your HTML, include the following files:

<script src="CustomScripts/support/zlib.js"></script>
<script src="CustomScripts/support/png.js"></script>
<script src="CustomScripts/FileSaver.js"></script>
<script src="CustomScripts/jspdf.js"></script>
<script src="CustomScripts/jspdf.plugin.addimage.js"></script>
<script src="CustomScripts/jspdf.plugin.png_support.js"></script>

All of these files are available for download at https://example.com/jsPDF-libraries

The FileSaver.js file can be found in the libs/FileSaver.js folder, while zlib.js and png.js files are located in the libs/png_support.js directory.

If you do not require the ability to save PDF files, you may exclude the FileSaver.js file from the list.

In case you receive alerts about missing functions, refer to the dist/jspdf.debug.js file. Search for the specific function name and find the corresponding module that contains it. Include that module in the above list (following the jspdf.js file).

Answer 4

To add these functionalities to your HTML, include the following files:

<script src="CustomScripts/support/zlib.js"></script>
<script src="CustomScripts/support/png.js"></script>
<script src="CustomScripts/FileSaver.js"></script>
<script src="CustomScripts/jspdf.js"></script>
<script src="CustomScripts/jspdf.plugin.addimage.js"></script>
<script src="CustomScripts/jspdf.plugin.png_support.js"></script>

All of these files are available for download at https://example.com/jsPDF-libraries

The FileSaver.js file can be found in the libs/FileSaver.js folder, while zlib.js and png.js files are located in the libs/png_support.js directory.

If you do not require the ability to save PDF files, you may exclude the FileSaver.js file from the list.

In case you receive alerts about missing functions, refer to the dist/jspdf.debug.js file. Search for the specific function name and find the corresponding module that contains it. Include that module in the above list (following the jspdf.js file).

Answer 5

Answer №3

Make sure to include the doc.output method call once you have created the document:

doc.addImage(imgData, 'JPEG', 15, 40, 200, 114);
doc.output('datauri');

Answer 6

Make sure to include the doc.output method call once you have created the document:

doc.addImage(imgData, 'JPEG', 15, 40, 200, 114);
doc.output('datauri');

Answer 7

Answer №4

If you are utilizing a framework such as Vue.js, you have the option to store the image in a reactive state and display it within the view. Upon exporting this code snippet, the image will be visible.

const [image, setImage] = Vue.useState(null);

  Vue.useEffect(() => {
    const loadImage = async () => {
      let imageUrl =
        "your-image-url";
      let imageUrlFetched = await fetch(imageUrl);
      let blob = await imageUrlFetched.blob();
      let fileName = imageUrl.substring(imageUrl.lastIndexOf("/") + 1);
      let file = new File([blob], fileName, { type: blob.type });
      setImage(URL.createObjectURL(file));
    };

    loadImage();
  }, []);

In conclusion, you can assign the reactive state, 'image', to the src attribute of an HTML img tag:

<img src={image} alt="" />

Answer 8

If you are utilizing a framework such as Vue.js, you have the option to store the image in a reactive state and display it within the view. Upon exporting this code snippet, the image will be visible.

const [image, setImage] = Vue.useState(null);

  Vue.useEffect(() => {
    const loadImage = async () => {
      let imageUrl =
        "your-image-url";
      let imageUrlFetched = await fetch(imageUrl);
      let blob = await imageUrlFetched.blob();
      let fileName = imageUrl.substring(imageUrl.lastIndexOf("/") + 1);
      let file = new File([blob], fileName, { type: blob.type });
      setImage(URL.createObjectURL(file));
    };

    loadImage();
  }, []);

In conclusion, you can assign the reactive state, 'image', to the src attribute of an HTML img tag:

<img src={image} alt="" />

Answer 9

Answer №5

Currently, the jsPDF library exclusively supports images in JPEG format.

Unfortunately, the image with the data string

var imgData = 'data:image/png;base64,iVBORw...

is in PNG format.

Answer 10

Currently, the jsPDF library exclusively supports images in JPEG format.

Unfortunately, the image with the data string

var imgData = 'data:image/png;base64,iVBORw...

is in PNG format.

The conundrum of jsPDF's image compatibility

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

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