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author | Peter Huang <stigersmile@gmail.com> | 2021-06-07 18:15:40 +0800 |
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committer | Irvin <irvinfly@gmail.com> | 2021-06-10 00:05:27 +0800 |
commit | 4a997b94a59b43b9bbcfd3425ae37886f954314d (patch) | |
tree | 655442e5cb1f9ccb2c94f41cf218332338fd59eb /files/zh-tw/learn | |
parent | f902f58c68d32b1d142e18710d0eb017d3c188a2 (diff) | |
download | translated-content-4a997b94a59b43b9bbcfd3425ae37886f954314d.tar.gz translated-content-4a997b94a59b43b9bbcfd3425ae37886f954314d.tar.bz2 translated-content-4a997b94a59b43b9bbcfd3425ae37886f954314d.zip |
add angular item acomponent Tw
Diffstat (limited to 'files/zh-tw/learn')
-rw-r--r-- | files/zh-tw/learn/tools_and_testing/client-side_javascript_frameworks/angular_item_component/index.html | 74 |
1 files changed, 27 insertions, 47 deletions
diff --git a/files/zh-tw/learn/tools_and_testing/client-side_javascript_frameworks/angular_item_component/index.html b/files/zh-tw/learn/tools_and_testing/client-side_javascript_frameworks/angular_item_component/index.html index e079a51eb7..f55b214fb7 100644 --- a/files/zh-tw/learn/tools_and_testing/client-side_javascript_frameworks/angular_item_component/index.html +++ b/files/zh-tw/learn/tools_and_testing/client-side_javascript_frameworks/angular_item_component/index.html @@ -145,18 +145,19 @@ Angular使用 <code>\{{item.description}}</code> 從 <code>items</code> 陣列 簡單來說,<code>splice()</code> 方法從陣列中刪除了該項目。 <code>splice()</code> 的更多訊息請參閱 MDN Web 文章:<a href="/zh-TW/docs/Web/JavaScript/Reference/Global_Objects/Array/splice"><code>Array.prototype.splice()</code></a>。</p> -<h2 id="add_logic_to_itemcomponent-">Add logic to ItemComponent</h2> +<h2 id="add_logic_to_itemcomponent-">在 ItemComponent 添加邏輯</h2> -<p>To use the <code>ItemComponent</code> UI, you must add logic to the component such as functions, and ways for data to go in and out.</p> +<p>使用 <code>ItemComponent</code> UI, 你必須在元件中添加邏輯,就跟在 function 中寫輸入與輸出的方式一樣。</p> -<p>In <code>item.component.ts</code>, edit the JavaScript imports as follows:</p> +<p>在 <code>item.component.ts</code>,引入 JavaScript,如下所示:</p> <pre class="brush: js">import { Component, Input, Output, EventEmitter } from '@angular/core'; import { Item } from "../item";</pre> -<p>The addition of <code>Input</code>, <code>Output</code>, and <code>EventEmitter</code> allows <code>ItemComponent</code> to share data with <code>AppComponent</code>. -By importing <code>Item</code>, <code>ItemComponent</code> can understand what an <code>item</code> is.</p> -<p>Further down <code>item.component.ts</code>, replace the generated <code>ItemComponent</code> class with the following:</p> +<p>加入 <code>Input</code> , <code>Output</code>,和 <code>EventEmitter</code> 使 <code>ItemComponent</code> 可以與 <code>AppComponent</code> 共享數據, +透過匯入 <code>Item</code> , 就可以知道在 <code>ItemComponent</code> 的 <code>item</code> 為何。</p> + +<p>繼續看 <code>item.component.ts</code> ,把生成的 <code>ItemComponent</code> 替換成以下內容:</p> <pre class="brush: js">export class ItemComponent { @@ -173,37 +174,28 @@ By importing <code>Item</code>, <code>ItemComponent</code> can understand what a } }</pre> -<p>The <code>editable</code> property helps toggle a section of the template where a user can edit an item. -<code>editable</code> is the same property in the HTML as in the <code>*ngIf</code> statement, <code>*ngIf="editable"</code>. -When you use a property in the template, you must also declare it in the class.</p> +<p><code>editable</code> 屬性有助於切換模板,讓使用者可以編輯其項目。HTML中的 <code>editable</code> 屬性與 <code>*ngIf</code> 語句中的屬性相同, <code>*ngIf="editable"</code>。當你在模板使用此屬性時,你也必須在class中宣告它。</p> -<p><code>@Input()</code>, <code>@Output()</code>, and <code>EventEmitter</code> facilitate communication between your two components. -An <code>@Input()</code> serves as a doorway for data to come into the component, and an <code>@Output()</code> acts as a doorway for data to go out of the component. -An <code>@Output()</code> has to be of type <code>EventEmitter</code>, so that a component can raise an event when there's data ready to share with another component.</p> +<p><code>@Input()</code> , <code>@Output()</code> 和 <code>EventEmitter</code> 促進兩個元件中的溝通,一個 <code>@Output()</code> 服務元件做為資料傳進的入口,然後一個 <code>@Output()</code> 是將元件資料傳到外層。<code>@Output()</code> 必須是 <code>EventEmitter</code> 的類型,資料可以透過事件分享至其他組件。</p> -<p>Use <code>@Input()</code> to specify that the value of a property can come from outside of the component. -Use <code>@Output()</code> in conjunction with <code>EventEmitter</code> to specify that the value of a property can leave the component so that another component can receive that data.</p> +<p>使用 <code>@Input()</code>指定外部元件要傳進之屬性的值,將 <code>@Output()</code> 與 <code>EventEmitter</code> 結合使用可將該元件指定屬性的值傳出,使得另一個元件可以接收其資料。</p> -<p>The <code>saveItem()</code> method takes as an argument a <code>description</code>. -The <code>description</code> is the text that the user enters into the HTML <code><input></code> when editing an item in the list. -This <code>description</code> is the same string from the <code><input></code> with the <code>#editedItem</code> template variable.</p> +<p><code>saveItem()</code> 方法是在 <code>description</code> 取得一個引數,此<code>description</code> 為使用者輸入 HTML 的 <code><input></code> 標籤編輯清單的項目時的文字, +此 <code>description</code> 與 <code><input></code> 中帶有 <code>#editedItem</code> 範本變數的字符串相同。</p> -<p>If the user doesn't enter a value but clicks <strong>Save</strong>, <code>saveItem()</code> returns nothing and does not update the <code>description</code>. -If you didn't have this <code>if</code> statement, the user could click <strong>Save</strong> with nothing in the HTML <code><input></code>, and the <code>description</code> would become an empty string.</p> +<p>如果使用者沒有輸入任何的值但點擊 <strong>Save</strong> 時,<code>saveItem()</code> 不會回傳任何東西與更新 <code>description</code>。如果你沒有用 <code>if</code> ,使用者就可以在 HTML 的 <code><input></code> 沒有值的時候點擊 <strong>Save</strong>,並且 <code>description</code> 會是空字串。</p> -<p>If a user enters text and clicks save, <code>saveItem()</code> sets <code>editable</code> to false, which causes the <code>*ngIf</code> in the template to remove the edit feature and render the <strong>Edit</strong> and <strong>Delete</strong> buttons again.</p> +<p>如果使用者輸入文字並點擊儲存, <code>saveItem()</code> 會設定 <code>editable</code> 是 false,這會導致模板中的<code>*ngIf</code> 移除編輯功能並重新渲染 <strong>Edit</strong> 跟 <strong>Delete</strong> 的按鈕</p> -<p>Though the application should compile at this point, you need to use the <code>ItemComponent</code> in <code>AppComponent</code> so you can see the new features in the browser.</p> +<p>儘管程式現在可以編譯,你必須在 <code>AppComponent</code> 中使用 <code>ItemComponent</code> 才能在瀏覽器看到新功能。</p> -<h2 id="use_the_itemcomponent_in_the_appcomponent">Use the ItemComponent in the AppComponent</h2> +<h2 id="use_the_itemcomponent_in_the_appcomponent">在 AppComponent 中使用 ItemComponent</h2> -<p>Including one component within another in the context of a parent-child relationship gives you the flexibility of using components wherever you need them.</p> +<p>在父子關係的情境下,可將一個組件包含在另一個組件中,讓您靈活地使用它們。</p> -<p>The <code>AppComponent</code> serves as a shell for the application where you can include other components.</p> +<p><code>AppComponent</code> 就像個應用程式的外殼,可在內部加入其他元件</p> -<p>To use the <code>ItemComponent</code> in <code>AppComponent</code>, put the <code>ItemComponent</code> selector in the <code>AppComponent</code> template. -Angular specifies the selector of a component in the metadata of the <code>@Component()</code> decorator. -In this example, the selector is <code>app-item</code>:</p> +<p>要在 <code>AppComponent</code> 中使用 <code>ItemComponent</code>,需將 <code>ItemComponent</code> 選擇器放到 <code>AppComponent</code> 中。Angular 在元件共享數據的元件中使用 <code>@Component()</code> 裝飾器,此選擇器為 <code>app-item</code>:</p> <pre class="brush: js">@Component({ selector: 'app-item', @@ -211,8 +203,7 @@ In this example, the selector is <code>app-item</code>:</p> styleUrls: ['./item.component.css'] })</pre> -<p>To use the <code>ItemComponent</code> selector within the <code>AppComponent</code>, you add the element, <code><app-item></code>, which corresponds to the selector you defined for the component class to <code>app.component.html</code>. -Replace the current unordered list in <code>app.component.html</code> with the following updated version:</p> +<p>要在 <code>AppComponent</code> 中使用 <code>ItemComponent</code> 選擇器時,你要增加元素 <code><app-item></code>,它對應你在 <code>app.component.html</code> 中對元件類別定義的選擇器。用以下更新的版本替換在 <code>app.component.html</code> 中未排序清單:</p> <pre class="brush: html"><h2>\{{items.length}} <span *ngIf="items.length === 1; else elseBlock">item</span> <ng-template #elseBlock>items</ng-template></h2> @@ -223,28 +214,17 @@ Replace the current unordered list in <code>app.component.html</code> with the f </li> </ul></pre> -<p>The double curly brace syntax, <code>\{{}}</code>, in the <code><h2></code> interpolates the length of the <code>items</code> array and displays the number.</p> +<p>雙括號 <code>\{{}}</code>,在 <code><h2></code> 內顯示 <code>items</code> 的長度與數目。</p> -<p>The <code><span></code> in the <code><h2></code> uses an <code>*ngIf</code> and <code>else</code> to determine whether the <code><h2></code> should say "item" or "items". -If there is only a single item in the list, the <code><span></code> containing "item" displays. -Otherwise, if the length of the <code>items</code> array is anything other than <code>1</code>, the <code><ng-template></code>, which we've named <code>elseBlock</code>, with the syntax <code>#elseBlock</code>, shows instead of the <code><span></code>. -You can use Angular's <code><ng-template></code> when you don't want content to render by default. -In this case, when the length of the <code>items</code> array is not <code>1</code>, the <code>*ngIf</code> shows the <code>elseBlock</code> and not the <code><span></code>.</p> +<p>在 <code><h2></code> 中 <code><span></code> 使用 <code>*ngIf</code> 與 <code>else</code> 決定 <code><h2></code> 是否要呈現 "item" 或 "items"。如果在列表中只有一個項目, 則 <code> 會顯示包含 <code><span></code> 的內容。當<code>items</code> 陣列不等於 <code>1</code> 時,被我們命名為 <code>elseBlock</code> 的 <code><ng-template></code>,將顯示 <code>#elseBlock</code>,而不是 <code><span></code>。當您不想內容在預設渲染的時候,可以使用 Angular 的 <code><ng-template></code> ,因 #elseBlock 不是 <code><span></code>,是使用 <code><ng-template></code>。在此範例中,若 <code>item</code> 陣列長度不是 <code>1</code> ,則 <code>*ngIf</code> 會顯示 <code>elseBlock</code> 而不顯示 <code><span></code>。</code> -<p>The <code><li></code> uses Angular's repeater directive, <code>*ngFor</code>, to iterate over all of the items in the <code>items</code> array. -Angular's <code>*ngFor</code> like <code>*ngIf</code>, is another directive that helps you change the structure of the DOM while writing less code. -For each <code>item</code>, Angular repeats the <code><li></code> and everything within it, which includes <code><app-item></code>. -This means that for each item in the array, Angular creates another instance of <code><app-item></code>. -For any number of items in the array, Angular would create that many <code><li></code> elements.</p> +<p>在 <code><li></code> 使用 Angular 的結構型指令 <code>*ngFor</code> 會在 <code>items</code>陣列迭代所有的項目,Angular 的 <code>*ngFor</code> 與 <code>*ngIf</code> 指令相似,是另一個可以協助你用更少的程式碼改變 DOM 元素架構,每一個 <code>item</code>,Angular 會重複 <code><li></code> 與其所有的內容,其中包含 <code><app-item></code>。這代表 Angular 為陣列中的每一個項目建立另一個 <code><app-item></code> 實體。Angular 會建立與 <code>items</code> 陣列中的數量相同的項目的 <code><li></code> 元素。</p> -<p>You can use an <code>*ngFor</code> on other elements, too, such as <code><div></code>, <code><span></code>, or <code><p></code>, to name a few.</p> +<p>您可使用 <code>*ngFor</code> 在其他的元素上,像是在 <code><div></code>、<code><span></code> 或是 <code><p></code>,以此類推。</p> -<p>The <code>AppComponent</code> has a <code>remove()</code> method for removing the item, which is bound to the <code>remove</code> property in the <code>ItemComponent</code>. -The <code>item</code> property in the square brackets, <code>[]</code>, binds the value of <code>item</code> between the <code>AppComponent</code> and the <code>ItemComponent</code>.</p> +<p>在 <code>AppComponent</code> 有一個移除項目的 <code>remove()</code> 的方法,是綁定 <code>ItemComponent</code> 中 remove 的屬性,此 <code>item</code> 屬性是在中括號內 <code>[]</code>,用來綁定 <code>item</code> 在 <code>AppComponent</code> 與 <code>ItemComponent</code> 之間的值。</p> -<p>Now you should be able to edit and delete items from the list. -When you add or delete items, the count of the items should also change. -To make the list more user-friendly, add some styles to the <code>ItemComponent</code>.</p> +<p>現在你應該知道如何編輯和刪除在列表中的項目。當你新增或刪除項目時,項目的數量也會更動,為了使列表更易於使用,請在 <code>ItemComponent</code> 中新增些樣式。</p> <h2 id="add_styles_to_itemcomponent-">為 ItemComponent 添加樣式</h2> @@ -434,4 +414,4 @@ Adapted from https://css-tricks.com/the-checkbox-hack/#custom-designed-radio-but <li><a href="/en-US/docs/Learn/Tools_and_testing/Client-side_JavaScript_frameworks/Angular_building">Building Angular applications and further resources</a></li> </ul> </li> -</ul> +</ul>
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