# Loading Pages by Using the Web Component
Page loading is a basic function of the **Web** component. Depending on the data source, page loading falls into three types: loading of network pages, loading of local pages, and loading of HTML rich text data.
If acquisition of network resources is involved in page loading, you need to declare the [ohos.permission.INTERNET](../security/accesstoken-guidelines.md) permission.
## Loading Network Pages
You can specify the default network page to be loaded when creating a **Web** component. After the default network page is loaded, call [loadUrl()](../reference/apis/js-apis-webview.md#loadurl) if you want to change the network page displayed by the **Web** component.
In the following example, after the **www.example.com** page is loaded by the **Web** component, **loadUrl** is called to change the displayed page to **www.example1.com**.
```ts
// xxx.ets
import web_webview from '@ohos.web.webview';
@Entry
@Component
struct WebComponent {
webviewController: web_webview.WebviewController = new web_webview.WebviewController();
build() {
Column() {
Button('loadUrl')
.onClick(() => {
try {
// Upon button clicking, call loadUrl to redirect to www.example1.com.
this.webviewController.loadUrl('www.example1.com');
} catch (error) {
console.error(`ErrorCode: ${error.code}, Message: ${error.message}`);
}
})
// When creating a Web component, set the default network page to be loaded to www.example.com.
Web({ src: 'www.example.com', controller: this.webviewController})
}
}
}
```
## Loading Local Pages
Local page files are stored in the application's **rawfile** directory. You can specify the local page to be loaded by default when creating a **Web** component. After page loading is complete, you can call [loadUrl()](../reference/apis/js-apis-webview.md#loadurl) to change the displayed page of the **Web** component.
The following example shows how to load a local page file.
- Local page file in the application's resources/rawfile directory:
**Figure 1** Path of local page files
- Application code:
```ts
// xxx.ets
import web_webview from '@ohos.web.webview';
@Entry
@Component
struct WebComponent {
webviewController: web_webview.WebviewController = new web_webview.WebviewController();
build() {
Column() {
Button('loadUrl')
.onClick(() => {
try {
// Upon button clicking, call loadUrl to redirect to local1.html.
this.webviewController.loadUrl($rawfile("local1.html"));
} catch (error) {
console.error(`ErrorCode: ${error.code}, Message: ${error.message}`);
}
})
// When creating a Web component, load the local.html file through $rawfile.
Web({ src: $rawfile("local.html"), controller: this.webviewController })
}
}
}
```
- Code of the **local.html** page:
```html
Hello World
```
## Loading HTML Rich Text Data
The **Web** component provides the [loadData()](../reference/apis/js-apis-webview.md#loaddata) API for you to load HTML rich text data. This API is applicable if you want to display some page sections instead of the entire page.
```ts
// xxx.ets
import web_webview from '@ohos.web.webview';
@Entry
@Component
struct WebComponent {
controller: web_webview.WebviewController = new web_webview.WebviewController();
build() {
Column() {
Button('loadData')
.onClick(() => {
try {
// Upon button clicking, call loadData to load HTML rich text data.
this.controller.loadData(
'Source:source
',
'text/html',
'UTF-8'
);
} catch (error) {
console.error(`ErrorCode: ${error.code}, Message: ${error.message}`);
}
})
// When creating a Web component, set the default network page to be loaded to www.example.com.
Web({ src: 'www.example.com', controller: this.controller })
}
}
}
```