Can you help me identify any issues with this code for uploading an image and quickly displaying it in Angular?

Located within the profile.component.html file

<label for="profile">Profile Photo</label>
<input type="file" [(ngModel)]='uploadedPhoto'/>
<img [src]='uploadedPhoto'>

Contained in the profile.component.ts file

selectedPhoto: File;

set uploadedPhoto(file: File) {
    this.selectedPhoto = file;
 }

get uploadedPhoto() {
    return this.selectedPhoto;
}

Answer №1

Initially, the usage of [(ngModel)] on the File Input is providing a string value instead of a File object in this context; set input(temp: File) { .. }.

Due to browser security measures, the string path obtained is often virtual (e.g. C:\fakepath\image.png). Although there are some workarounds available, they tend to vary across different browsers. More information on this issue can be found here; How to resolve the C:\fakepath?

Certain browsers implement a security feature that prevents JavaScript from accessing the local full path of your file. This restriction makes sense as users wouldn't want servers to have access to their local machine's filesystem. It would be ideal if all browsers followed suit.

In such cases, using a FileReader can help load the image data for the Image element. This process is similar to what would be required if you intended to upload the file data later on.

const fReader = new FileReader();
fReader.readAsDataURL(this.profilePhoto);
fReader.onloadend = (event) => {
  this.profilePhotoImage = event.target.result;
}

For a demonstration, refer to the following working example link; https://stackblitz.com/edit/angular-cfvlhn

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