An Angular Directive That Provides File Input Functionality Forms

File Input Accessor is an Angular 4+ directive that provides file input functionality in Angular Forms.

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How to make use of it:

Install the package from npm:

npm i file-input-accessor

1. Import the FileInputAccessorModule.

import {BrowserModule} from '@angular/platform-browser';
 import {FileInputAccessorModule} from "file-input-accessor";

 @NgModule({
     declarations: [
         AppComponent
     ],
     imports: [
         BrowserModule,
         FileInputAccessorModule
     ],
     providers: [],
     bootstrap: [AppComponent]
 })
 export class AppModule {}

2. You can use FormControl and NgModel with your own file input.

<!--file-upload.component.html-->

 <form>
   <!--Reactive form control-->
   <input type="file" multiple [formControl]="fileControl">
 </form>

 <form>
   <!--Template form control, using model changes to trigger upload-->
   <input type="file" multiple name="templateFileUploadControl" [ngModel]="modelChangesFiles" (ngModelChange)="onFileInputChange($event)">
 </form>

 <form>
   <!--Template form control, upload is manually triggered-->
   <input type="file" multiple [(ngModel)]="manualChangesFiles" name="templateFileUploadControl2">
   <button type="button" (click)="submitFiles()">Click to upload</button>
 </form>

angular 4+ file input accessor, FileInputAccessor Plugin/Github