I'm building a form in an Angular 2 application.
Html gives me the submit event. In Angular I could listen to this event using a (submit) event binding. On top of that, Angular adds the ngSubmit event, which I could listen to, using (ngSubmit).
I understand that submit comes from html, and ngSubmit from Angular. What I don't understand is why I would need to listen to a special ngSubmit event, instead of the normal submit event.
I created a plunker that listens to both events and both seem to do the same thing.
What is the difference between listening to (submit) and (ngSubmit)?
@Component({
selector: 'my-app',
template: `
<form (submit)='onSubmit(form)' (ngSubmit)='onNgSubmit(form)' novalidate #form='ngForm'>
<input type='text' name='input' [(ngModel)]='input' required>
<input type='submit' value='Submit' required>
</form>
`,
})
export class App {
input : string;
onSubmit(form): void {
console.log(`submit: ${this.input}, valid: ${form.valid}`);
}
onNgSubmit(form): void {
console.log(`ng-submit: ${this.input}, valid: ${form.valid}`);
}
}
ngSubmit ensures that the form doesn’t submit when the handler code
throws and causes an actual http post request.
from https://blog.thoughtram.io/angular/2016/03/21/template-driven-forms-in-angular-2.html
submit: It is html default form submit event, it will call underlying method when form gets submitted.
ngSubmit: Is host binding situated on form element. Basically it prevent default submit event of browser(which can be form post) by returning false. Eventually you can prevent traditional PostBack calls or page reload due to form load. This way you can validate your form & submit it to server by manual ajax from Component code
submit: If function is not define on its click event then it never post the data.
(ngsubmit)="saveEmployee(ngForm)": its post the ngform value to console in angular
None of the answers clearly explains as the explaination given in this link.
Submit- triggers a post call to browser URL/server.
Ngsubmit- calls local angular component to do something useful like form validation BEFORE postback to browser url/server.
It can be used to hijack form submission or control submit process.
https://codecraft.tv/courses/angular/forms/submitting-and-resetting/
