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docs: edit getting started start-forms.md (#39681) 

PR Close #39681
This commit is contained in:
Kapunahele Wong 2020-11-13 16:09:26 -05:00 committed by atscott
parent 087784aba1
commit 184d0e568f
9 changed files with 59 additions and 95 deletions
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7
aio/content/examples/getting-started/src/app/cart/cart.component.1.ts
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@ -1,15 +1,12 @@
import { Component, OnInit } from '@angular/core';
import { Component } from '@angular/core';
@Component({
selector: 'app-cart',
templateUrl: './cart.component.html',
styleUrls: ['./cart.component.css']
})
export class CartComponent implements OnInit {
export class CartComponent {
constructor() { }
ngOnInit() {
}
}

2
aio/content/examples/getting-started/src/app/cart/cart.component.2.ts
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@ -12,7 +12,7 @@ import { CartService } from '../cart.service';
// #docregion inject-cart, items, submit
export class CartComponent {
// #enddocregion inject-cart
items;
items = this.cartService.getItems();
// #docregion inject-cart
constructor(

2
aio/content/examples/getting-started/src/app/cart/cart.component.3.ts
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@ -17,7 +17,7 @@ export class CartComponent implements OnInit {
private cartService: CartService
) { }
ngOnInit() {
ngOnInit(): void {
this.items = this.cartService.getItems();
}
}

2
aio/content/examples/getting-started/src/app/cart/cart.component.html
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@ -12,7 +12,7 @@
</div>
<!-- #docregion checkout-form-1 -->
<form [formGroup]="checkoutForm" (ngSubmit)="onSubmit(checkoutForm.value)">
<form [formGroup]="checkoutForm" (ngSubmit)="onSubmit()">
<!-- #enddocregion checkout-form-1 -->
<div>

32
aio/content/examples/getting-started/src/app/cart/cart.component.ts
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@ -1,6 +1,6 @@
// #docplaster
// #docregion imports
import { Component, OnInit } from '@angular/core';
import { Component } from '@angular/core';
import { FormBuilder } from '@angular/forms';
import { CartService } from '../cart.service';
@ -12,37 +12,27 @@ import { CartService } from '../cart.service';
styleUrls: ['./cart.component.css']
})
// #docregion props-services, submit, inject-form-builder, checkout-form, checkout-form-group
export class CartComponent implements OnInit {
items;
// #enddocregion inject-form-builder
checkoutForm;
export class CartComponent {
// #enddocregion inject-form-builder
items = this.cartService.getItems();
checkoutForm = this.formBuilder.group({
name: '',
address: ''
});
// #enddocregion checkout-form
// #docregion inject-form-builder
constructor(
private cartService: CartService,
private formBuilder: FormBuilder,
) {
// #enddocregion inject-form-builder
this.checkoutForm = this.formBuilder.group({
name: '',
address: ''
});
// #docregion inject-form-builder
}
ngOnInit() {
this.items = this.cartService.getItems();
}
) {}
// #enddocregion inject-form-builder, checkout-form-group
// #enddocregion props-services
onSubmit(customerData) {
onSubmit(): void {
// Process checkout data here
this.items = this.cartService.clearCart();
console.warn('Your order has been submitted', this.checkoutForm.value);
this.checkoutForm.reset();
console.warn('Your order has been submitted', customerData);
}
// #docregion props-services, inject-form-builder, checkout-form, checkout-form-group
}

7
aio/content/examples/getting-started/src/app/shipping/shipping.component.1.ts
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@ -1,15 +1,12 @@
import { Component, OnInit } from '@angular/core';
import { Component } from '@angular/core';
@Component({
selector: 'app-shipping',
templateUrl: './shipping.component.html',
styleUrls: ['./shipping.component.css']
})
export class ShippingComponent implements OnInit {
export class ShippingComponent {
constructor() { }
ngOnInit() {
}
}

15
aio/content/examples/getting-started/src/app/shipping/shipping.component.ts
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@ -1,6 +1,6 @@
// #docplaster
// #docregion imports
import { Component, OnInit } from '@angular/core';
import { Component } from '@angular/core';
import { CartService } from '../cart.service';
// #enddocregion
@ -11,20 +11,17 @@ import { CartService } from '../cart.service';
styleUrls: ['./shipping.component.css']
})
// #docregion props, ctor
export class ShippingComponent implements OnInit {
shippingCosts;
export class ShippingComponent {
shippingCosts = this.cartService.getShippingPrices();
// #enddocregion props
// #docregion inject-cart-service
constructor(
private cartService: CartService
) {
constructor(private cartService: CartService) {
}
// #enddocregion inject-cart-service
ngOnInit() {
this.shippingCosts = this.cartService.getShippingPrices();
}
// #docregion props
}

17
aio/content/start/start-data.md
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@ -106,6 +106,8 @@ For customers to see their cart, you can create the cart view in two steps:
<code-example header="src/app/cart/cart.component.ts" path="getting-started/src/app/cart/cart.component.1.ts"></code-example>
StackBlitz also generates an `ngOnInit()` by default in components. You can ignore the `CartComponent` `ngOnInit()` for this tutorial.
1. Open `app.module.ts` and add a route for the component `CartComponent`, with a `path` of `cart`.
<code-example header="src/app/app.module.ts" path="getting-started/src/app/app.module.ts" region="cart-route">
@ -144,13 +146,8 @@ This section shows you how to use the cart service to display the products in th
<code-example path="getting-started/src/app/cart/cart.component.2.ts" header="src/app/cart/cart.component.ts" region="items">
</code-example>
1. Set the items using the `CartService` `getItems()` method.
This code sets the items using the `CartService` `getItems()` method.
You defined this method [when you created `cart.service.ts`](#generate-cart-service).
By using the `getItems()` method in Angular's `ngOnInit()`, Angular uses `getItems()` upon initialization of `CartComponent`.
The resulting `CartComponent` class is as follows.
<code-example path="getting-started/src/app/cart/cart.component.3.ts" header="src/app/cart/cart.component.ts" region="props-services">
</code-example>
1. Update the cart template with a header, and use a `<div>` with an `*ngFor` to display each of the cart items with its name and price.
The resulting `CartComponent` template is as follows.
@ -251,17 +248,13 @@ This section guides you through modifying the `ShippingComponent` to retrieve sh
<code-example header="src/app/shipping/shipping.component.ts" path="getting-started/src/app/shipping/shipping.component.ts" region="imports"></code-example>
1. Define a `shippingCosts` property.
<code-example path="getting-started/src/app/shipping/shipping.component.ts" header="src/app/shipping/shipping.component.ts" region="props"></code-example>
1. Inject the cart service in the `ShippingComponent` `constructor()`.
<code-example path="getting-started/src/app/shipping/shipping.component.ts" header="src/app/shipping/shipping.component.ts" region="inject-cart-service"></code-example>
1. Set the `shippingCosts` property using the `getShippingPrices()` method from the `CartService`.
1. Define a `shippingCosts` property that sets the `shippingCosts` property using the `getShippingPrices()` method from the `CartService`.
<code-example path="getting-started/src/app/shipping/shipping.component.ts" header="src/app/shipping/shipping.component.ts" region="ctor"></code-example>
<code-example path="getting-started/src/app/shipping/shipping.component.ts" header="src/app/shipping/shipping.component.ts" region="props"></code-example>
1. Update the `ShippingComponent` template to display the shipping types and prices using the `async` pipe.

70
aio/content/start/start-forms.md
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@ -1,61 +1,48 @@
# Using forms for user input
At the end of [Managing Data](start/start-data "Try it: Managing Data"), the online store application has a product catalog and a shopping cart.
This guide builds on the [Managing Data](start/start-data "Try it: Managing Data") step of the Getting Started tutorial, [Get started with a basic Angular app](start "Get started with a basic Angular app").
This section walks you through adding a form-based checkout feature to collect user information as part of checkout.
## Forms in Angular
Forms in Angular build upon the standard HTML forms to help you create custom form controls and easy validation experiences. There are two parts to an Angular Reactive form: the objects that live in the component to store and manage the form, and the visualization of the form that lives in the template.
## Define the checkout form model
First, set up the checkout form model. Defined in the component class, the form model is the source of truth for the status of the form.
This step shows you how to set up the checkout form model in the component class.
The form model determines the status of the form.
1. Open `cart.component.ts`.
1. Angular's `FormBuilder` service provides convenient methods for generating controls. As with the other services you've used, you need to import and inject the service before you can use it:
1. Import the `FormBuilder` service from the `@angular/forms` package.
This service provides convenient methods for generating controls.
1. Import the `FormBuilder` service from the `@angular/forms` package.
<code-example header="src/app/cart/cart.component.ts" path="getting-started/src/app/cart/cart.component.ts" region="imports">
</code-example>
<code-example header="src/app/cart/cart.component.ts" path="getting-started/src/app/cart/cart.component.ts" region="imports">
</code-example>
1. Inject the `FormBuilder` service in the `CartComponent` `constructor()`.
This service is part of the `ReactiveFormsModule` module, which you've already imported.
The `ReactiveFormsModule` provides the `FormBuilder` service, which `AppModule` (in `app.module.ts`) already imports.
<code-example header="src/app/cart/cart.component.ts" path="getting-started/src/app/cart/cart.component.ts" region="inject-form-builder">
</code-example>
1. Inject the `FormBuilder` service.
1. To gather the user's name and address, use the `FormBuilder` `group()` method to set the `checkoutForm` property to a form model containing `name` and `address` fields.
<code-example header="src/app/cart/cart.component.ts" path="getting-started/src/app/cart/cart.component.ts" region="inject-form-builder">
</code-example>
<code-example header="src/app/cart/cart.component.ts" path="getting-started/src/app/cart/cart.component.ts" region="checkout-form-group"></code-example>
1. Still in the `CartComponent` class, define the `checkoutForm` property to store the form model.
1. Define an `onSubmit()` method to process the form.
This method allows users to submit their name and address.
In addition, this method uses the `clearCart()` method of the `CartService` to reset the form and clear the cart.
<code-example header="src/app/cart/cart.component.ts" path="getting-started/src/app/cart/cart.component.ts" region="checkout-form">
</code-example>
The entire cart component class is as follows:
1. To gather the user's name and address, set the `checkoutForm` property with a form model containing `name` and `address` fields, using the `FormBuilder` `group()` method. Add this between the curly braces, `{}`,
of the constructor.
<code-example header="src/app/cart/cart.component.ts" path="getting-started/src/app/cart/cart.component.ts" region="checkout-form-group"></code-example>
1. For the checkout process, users need to submit their name and address. When they submit their order, the form should reset and the cart should clear.
1. In `cart.component.ts`, define an `onSubmit()` method to process the form. Use the `CartService` `clearCart()` method to empty the cart items and reset the form after its submission. In a real-world app, this method would also submit the data to an external server. The entire cart component class is as follows:
<code-example header="src/app/cart/cart.component.ts" path="getting-started/src/app/cart/cart.component.ts">
</code-example>
Now that you've defined the form model in the component class, you need a checkout form to reflect the model in the view.
<code-example header="src/app/cart/cart.component.ts" path="getting-started/src/app/cart/cart.component.ts">
</code-example>
## Create the checkout form
Use the following steps to add a checkout form at the bottom of the "Cart" view.
Use the following steps to add a checkout form at the bottom of the Cart view.
1. Open `cart.component.html`.
1. At the bottom of `cart.component.html`, add an HTML `<form>` element and a **Purchase** button.
1. At the bottom of the template, add an HTML form to capture user information.
1. Use a `formGroup` property binding to bind the `checkoutForm` to the `form` tag in the template. Also include a "Purchase" button to submit the form.
1. Use a `formGroup` property binding to bind `checkoutForm` to the HTML `<form>`.
<code-example header="src/app/cart/cart.component.html" path="getting-started/src/app/cart/cart.component.3.html" region="checkout-form">
</code-example>
@ -65,21 +52,24 @@ Use the following steps to add a checkout form at the bottom of the "Cart" view.
<code-example path="getting-started/src/app/cart/cart.component.html" header="src/app/cart/cart.component.html (cart component template detail)" region="checkout-form-1">
</code-example>
1. Add input fields for `name` and `address`. Use the `formControlName` attribute binding to bind the `checkoutForm` form controls for `name` and `address` to their input fields. The final complete component is as follows:
1. Add `<input>` fields for `name` and `address`, each with a `formControlName` attribute that binds to the `checkoutForm` form controls for `name` and `address` to their `<input>` fields.
The complete component is as follows:
<code-example path="getting-started/src/app/cart/cart.component.html" header="src/app/cart/cart.component.html" region="checkout-form-2">
</code-example>
After putting a few items in the cart, users can now review their items, enter their name and address, and submit their purchase:
After putting a few items in the cart, users can review their items, enter their name and address, and submit their purchase.
<div class="lightbox">
<img src='generated/images/guide/start/cart-with-items-and-form.png' alt="Cart view with checkout form">
</div>
To confirm submission, open the console where you should see an object containing the name and address you submitted.
To confirm submission, open the console to see an object containing the name and address you submitted.
## Next steps
<hr />
Congratulations! You have a complete online store application with a product catalog, a shopping cart, and a checkout function.
## What's next
You have a complete online store application with a product catalog, a shopping cart, and a checkout function.
[Continue to the "Deployment" section](start/start-deployment "Try it: Deployment") to move to local development, or deploy your app to Firebase or your own server.