When attempting to render a base64 image, it is currently returning as empty

Question

When attempting to render a base64 image, it is currently returning as empty

After extracting an image from Microsoft graphQL, I converted it to base64 before saving it in vuex.

Buffer.from(image).toString('base64')

Now, when trying to display the image in my component using the following code:

<img class="shadow avatar border-white" :src="`data:image/jpg;base64,${this.$store.state.user.profilePhoto}`"/>

I experimented with different approaches like adding charset-utf-8 and testing various image formats such as png and jpeg.

The CSS class applied simply rounds off the edges of the image and adds a subtle shadow effect.

However, currently, all I see is a transparent circle without the image being displayed. Any suggestions on a correct way to encode the image for rendering?

javascript vue.js base64

Answer 1

Answer №1

Here are some suggestions for improvement:

Avoid adding unnecessary elements like this in your templates as it may not be needed ($store should suffice).
It seems that the value you are trying to access may not be present in the store when the template is compiled. In order to make it reactive, consider using a computed property instead of directly accessing the variable. This way, Vue will attach a setter and getter, allowing the property to update reactively at runtime:
```
<img :sry="imgSrc" />


computed: {
  profileImg() {
    return this.$store.state.user && this.$store.state.user.profilePhoto;
  },

  imgSrc() {
    return 'data:image/jpg;base64,${this.profileImg}`;
  }
}
```

Edit: Encode Image data to dataURL

If you need to convert image data into a dataURL to use as the src value for image tags, you can achieve this by utilizing an HTMLCanvasElement:

function imageToDataURL(image) {
  const canvas = document.createElement('canvas');
  const context = canvas.getContext('2d');
  context.drawImage(image, image.width, image.height);
  return = canvas.toDataURL('image/png');
}

This function assumes that you already have a loaded image. If you need to load your image from a URI, ensure to wrap it within an image.onload function.

Answer 2

Here are some suggestions for improvement:

Avoid adding unnecessary elements like this in your templates as it may not be needed ($store should suffice).
It seems that the value you are trying to access may not be present in the store when the template is compiled. In order to make it reactive, consider using a computed property instead of directly accessing the variable. This way, Vue will attach a setter and getter, allowing the property to update reactively at runtime:
```
<img :sry="imgSrc" />


computed: {
  profileImg() {
    return this.$store.state.user && this.$store.state.user.profilePhoto;
  },

  imgSrc() {
    return 'data:image/jpg;base64,${this.profileImg}`;
  }
}
```

Edit: Encode Image data to dataURL

If you need to convert image data into a dataURL to use as the src value for image tags, you can achieve this by utilizing an HTMLCanvasElement:

function imageToDataURL(image) {
  const canvas = document.createElement('canvas');
  const context = canvas.getContext('2d');
  context.drawImage(image, image.width, image.height);
  return = canvas.toDataURL('image/png');
}

This function assumes that you already have a loaded image. If you need to load your image from a URI, ensure to wrap it within an image.onload function.

When attempting to render a base64 image, it is currently returning as empty

Answer №1

Edit: Encode Image data to dataURL

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When attempting to render a base64 image, it is currently returning as empty

Answer №1

Edit: Encode Image data to dataURL

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