Avoid Angular2 to systematically submit form on button click
JavascriptFormsAngularSubmitJavascript Problem Overview
Ok so maybe this is unclear. Get this form:
<form (ngSubmit)="submit()" #crisisForm="ngForm">
<input type="text" name="name" [(ngModel)]="crisis.name">
<button type="submit">Submit</button>
<button type="button" (click)="preview()">Preview</button>
<button type="reset" (click)="reset()">Reset</button>
</form>
Why do all buttons trigger the submit() function ? And how to avoid that ?
Javascript Solutions
Solution 1 - Javascript
I see two options to solve it:
-
Specify type="button" explicitly (i think it's more preferable):
According to W3 specification:
- http://w3c.github.io/html-reference/button.html > A button element with > no type attribute specified represents the same thing as a button > element with its type attribute set to "submit".
-
Use
$event.preventDefault():
or
<button (click)="preview($event);">Preview</button>
preview(e){
e.preventDefault();
console.log('preview')
}
Solution 2 - Javascript
This Plunker suggests otherwise, every button seem to work as intended.
However, to prevent default behaviour of the form you can do this,
TS:
submit(e){
e.preventDefault();
}
Template:
<form (submit)="submit($event)" #crisisForm="ngForm">
Solution 3 - Javascript
You have to import FormsModule from '@angular/forms' in your app.module.ts
import { FormsModule } from '@angular/forms';
@NgModule({
imports: [
FormsModule
],
})
Solution 4 - Javascript
I found that with 2.0 release (ngSubmit) is passing a null event value to the method so instead you should us (submit)
<form (submit)="submit($event)" #crisisForm="ngForm">
your .ts file
submit($event){
/* form code */
$event.preventDefault();
}
Solution 5 - Javascript
I has the same issue. The work around I found was the replace button with a and apply button style to anchor element:
<form (ngSubmit)="submit()" #crisisForm="ngForm">
<input type="text" name="name" [(ngModel)]="crisis.name">
<button type="submit">Submit</button>
<a class="btn" (click)="preview()">Preview</a>
<a class="btn" (click)="reset()">Reset</a>
</form>
Solution 6 - Javascript
Set type="button" in the button that you don't want to execute submit.
Solution 7 - Javascript
Angular provide a built-in solution for this. You just need to replace the (submit)="handleSubmit()" with (ngSubmit)="handleSubmit()". By doing this e.preventDefault() will be implicitly called by angular itself under the hood.