How to reset selected file with input tag file type in Angular 2?
Angular 5
html
<input type="file" #inputFile>
<button (click)="reset()">Reset</button>
template
@ViewChild('inputFile') myInputVariable: ElementRef;
reset() {
this.myInputVariable.nativeElement.value = '';
}
Button is not required. You can reset it after change event, it is just for demonstration
You can use ViewChild
to access the input in your component. First, you need to add #someValue
to your input so you can read it in the component:
<input #myInput type="file" placeholder="File Name" name="filename" (change)="onChange($event)">
Then in your component you need to import ViewChild
from @angular/core
:
import { ViewChild } from '@angular/core';
Then you use ViewChild
to access the input from template:
@ViewChild('myInput')
myInputVariable: ElementRef;
Now you can use myInputVariable
to reset the selected file because it's a reference to input with #myInput
, for example create method reset()
that will be called on click
event of your button:
reset() {
console.log(this.myInputVariable.nativeElement.files);
this.myInputVariable.nativeElement.value = "";
console.log(this.myInputVariable.nativeElement.files);
}
First console.log
will print the file you selected, second console.log
will print an empty array because this.myInputVariable.nativeElement.value = "";
deletes selected file(s) from the input. We have to use this.myInputVariable.nativeElement.value = "";
to reset the value of the input because input's FileList
attribute is readonly, so it is impossible to just remove item from array. Here's working Plunker.