# NavPushPathHelper

On the initial launch, the atomic service only downloads and installs the main package and its dependencies. Therefore, if the [NavDestination](ts-basic-components-navdestination.md) resides in a different HSP subpackage that is not a dependency of the main package, you'll need to use **NavPushPathHelper** to download and install the corresponding HSP subpackage first. After that, push the specified **NavDestination** page information onto the stack. This way, you enable [Navigation](ts-basic-components-navigation.md) to support dynamic loading of the HSP subpackage before the navigation occurs.

> **NOTE**
>
> This component is supported since API version 12. Updates will be marked with a superscript to indicate their earliest API version.

## Modules to Import

```ts
import { NavPushPathHelper } from '@kit.ArkUI'
```

## Child Components

Not supported

## Attributes

The [universal attributes](ts-universal-attributes-size.md) are not supported.

## NavPushPathHelper

Encapsulates all navigation APIs for [NavPathStack](ts-basic-components-navigation.md#navpathstack10). **NavPushPathHelper** holds a **NavPathStack** object and checks for the existence of a subpackage within its encapsulated navigation APIs. If the subpackage is absent, it dynamically downloads the subpackage. Once the download is complete, it calls the appropriate API of **NavPathStack** to push the specified [NavDestination](ts-basic-components-navdestination.md) page onto the stack. For details, see [Example](#example).

### constructor

constructor(navPathStack: NavPathStack)

A constructor used to create a **NavPushPathHelper** object.

**Atomic service API**: This API can be used in atomic services since API version 12.

**System capability**: SystemCapability.ArkUI.ArkUI.Full

**Parameters**

| Name  | Type                           | Mandatory  |  Description        |
| ---- | ----------------------------- | ---- | -------------------- |
| navPathStack | [NavPathStack](ts-basic-components-navigation.md#navpathstack10) | Yes   | [Navigation](ts-basic-components-navigation.md) stack.|

### pushPath

pushPath(moduleName: string, info: NavPathInfo, animated?: boolean): Promise\<void\>

Checks for the target subpackgae and, if it is not present, initiates a download using the specified module name. Once the subpackage is downloaded, the API pushes the [NavDestination](ts-basic-components-navdestination.md) page, as indicated by **info**, onto the navigation stack. This API uses a promise to return the result.

**Atomic service API**: This API can be used in atomic services since API version 12.

**System capability**: SystemCapability.ArkUI.ArkUI.Full

**Parameters**

| Name  | Type                           | Mandatory  | Description                |
| ---- | ----------------------------- | ---- | -------------------- |
| moduleName | string | Yes   | Module name of the package where the [NavDestination](ts-basic-components-navdestination.md) page is located.|
| info | [NavPathInfo](ts-basic-components-navigation.md#navpathinfo10) | Yes   | Information about the [NavDestination](ts-basic-components-navdestination.md) page.|
| animated | boolean | No   | Whether to support transition animation.<br>Default value: **true**|

**Return value**

| Type               | Description       |
| ------------------- | --------- |
| Promise\<void\> | Promise used to return the result.|

**Error codes**

For details about the error codes, see [Router Error Codes](../errorcode-router.md).

| ID  | Error Message|
| --------- | ------- |
| 300001    | hsp silent install fail.|

### pushPath

pushPath(moduleName: string, info: NavPathInfo, options?: NavigationOptions): Promise\<void\>

Checks for the target subpackgae and, if it is not present, initiates a download using the specified module name. Once the subpackage is downloaded, the API pushes the [NavDestination](ts-basic-components-navdestination.md) page, as indicated by **info**, onto the navigation stack. This API uses a promise to return the result. The behavior can vary based on [LaunchMode](ts-basic-components-navigation.md#launchmode12) specified in the **options** parameter.

**Atomic service API**: This API can be used in atomic services since API version 12.

**System capability**: SystemCapability.ArkUI.ArkUI.Full

**Parameters**

| Name  | Type                           | Mandatory  | Description                 |
| ---- | ----------------------------- | ---- | -------------------- |
| moduleName | string | Yes   | Module name of the package where the [NavDestination](ts-basic-components-navdestination.md) page is located.|
| info | [NavPathInfo](ts-basic-components-navigation.md#navpathinfo10) | Yes   | Information about the [NavDestination](ts-basic-components-navdestination.md) page.|
| options | [NavigationOptions](ts-basic-components-navigation.md#navigationoptions12) | No   | Navigation options.|

**Return value**

| Type               | Description       |
| ------------------- | --------- |
| Promise\<void\> | Promise used to return the result.|

**Error codes**

For details about the error codes, see [Router Error Codes](../errorcode-router.md).

| ID  | Error Message|
| --------- | ------- |
| 300001    | hsp silent install fail.|

### pushPathByName

pushPathByName(moduleName: string, name: string, param: Object, animated?: boolean): Promise\<void\>

Checks for the target subpackgae and, if it is not present, initiates a download using the specified module name. Once the subpackage is downloaded, the API pushes the [NavDestination](ts-basic-components-navdestination.md) page, as indicated by **name**, onto the navigation stack, along with the data specified by **param**. This API uses a promise to return the result.

**Atomic service API**: This API can be used in atomic services since API version 12.

**System capability**: SystemCapability.ArkUI.ArkUI.Full

**Parameters**

| Name   | Type     | Mandatory  | Description                   |
| ----- | ------- | ---- | --------------------- |
| moduleName | string | Yes   | Module name of the package where the [NavDestination](ts-basic-components-navdestination.md) page is located.|
| name  | string  | Yes   | Name of the [NavDestination](ts-basic-components-navdestination.md) page.  |
| param | Object | Yes   | Settings of the [NavDestination](ts-basic-components-navdestination.md) page.|
| animated | boolean | No   | Whether to support transition animation.<br>Default value: **true**|

**Return value**

| Type               | Description       |
| ------------------- | --------- |
| Promise\<void\> | Promise used to return the result.|

**Error codes**

For details about the error codes, see [Router Error Codes](../errorcode-router.md).

| ID  | Error Message|
| --------- | ------- |
| 300001    | hsp silent install fail.|

### pushPathByName

pushPathByName(moduleName: string, name: string, param: Object, onPop: Callback\<PopInfo>, animated?: boolean): Promise\<void\>

Checks for the target subpackgae and, if it is not present, initiates a download using the specified module name. Once the subpackage is downloaded, the API pushes the [NavDestination](ts-basic-components-navdestination.md) page, as indicated by **name**, onto the navigation stack, along with the data specified by **param**. The **onPop** callback handles the return results when the page is popped from the stack.This API uses a promise to return the result.

**Atomic service API**: This API can be used in atomic services since API version 12.

**System capability**: SystemCapability.ArkUI.ArkUI.Full

**Parameters**

| Name| Type| Mandatory| Description|
|------|------|------|------|
| moduleName | string | Yes   | Module name of the package where the [NavDestination](ts-basic-components-navdestination.md) page is located.|
| name  | string  | Yes   | Name of the [NavDestination](ts-basic-components-navdestination.md) page.  |
| param | Object | Yes   | Settings of the [NavDestination](ts-basic-components-navdestination.md) page.|
| onPop | Callback\<[PopInfo](ts-basic-components-navigation.md#popinfo11)> | Yes| Callback used to receive the result.|
| animated | boolean | No   | Whether to support transition animation.<br>Default value: **true**|

**Return value**

| Type               | Description       |
| ------------------- | --------- |
| Promise\<void\> | Promise used to return the result.|

**Error codes**

For details about the error codes, see [Router Error Codes](../errorcode-router.md).

| ID  | Error Message|
| --------- | ------- |
| 300001    | hsp silent install fail.|

### pushDestination

pushDestination(moduleName: string, info: NavPathInfo, animated?: boolean): Promise\<void\>

Checks for the target subpackgae and, if it is not present, initiates a download using the specified module name. Once the subpackage is downloaded, the API pushes the [NavDestination](ts-basic-components-navdestination.md) page, as indicated by **info**, onto the navigation stack. This API uses a promise to return the result.

**Atomic service API**: This API can be used in atomic services since API version 12.

**System capability**: SystemCapability.ArkUI.ArkUI.Full

**Parameters**

| Name  | Type                           | Mandatory  | Description                  |
| ---- | ----------------------------- | ---- | -------------------- |
| moduleName | string | Yes   | Module name of the package where the [NavDestination](ts-basic-components-navdestination.md) page is located.|
| info | [NavPathInfo](ts-basic-components-navigation.md#navpathinfo10) | Yes   | Information about the [NavDestination](ts-basic-components-navdestination.md) page.|
| animated | boolean | No   | Whether to support transition animation.<br>Default value: **true**|

**Return value**

| Type               | Description       |
| ------------------- | --------- |
| Promise\<void\> | Promise used to return the result.|

**Error codes**

For details about the error codes, see [Universal Error Codes](../../errorcode-universal.md) and [Router Error Codes](../errorcode-router.md).

| ID  | Error Message|
| --------- | ------- |
| 401      | Parameter error. Possible causes: 1. Mandatory parameters are left unspecified. 2. Incorrect parameters types. 3. Parameter verification failed.   |
| 100001    | Internal error.|
| 100005    | Builder function not registered. |
| 100006    | NavDestination not found.|
| 300001    | hsp silent install fail.|

### pushDestination

pushDestination(moduleName: string, info: NavPathInfo, options?: NavigationOptions): Promise\<void\>

Checks for the target subpackgae and, if it is not present, initiates a download using the specified module name. Once the subpackage is downloaded, the API pushes the [NavDestination](ts-basic-components-navdestination.md) page, as indicated by **info**, onto the navigation stack. This API uses a promise to return the result. The behavior can vary based on [LaunchMode](ts-basic-components-navigation.md#launchmode12) specified in the **options** parameter.

**Atomic service API**: This API can be used in atomic services since API version 12.

**System capability**: SystemCapability.ArkUI.ArkUI.Full

**Parameters**

| Name  | Type                           | Mandatory  | Description                 |
| ---- | ----------------------------- | ---- | -------------------- |
| moduleName | string | Yes   | Module name of the package where the [NavDestination](ts-basic-components-navdestination.md) page is located.|
| info | [NavPathInfo](ts-basic-components-navigation.md#navpathinfo10) | Yes   | Information about the [NavDestination](ts-basic-components-navdestination.md) page.|
| options | [NavigationOptions](ts-basic-components-navigation.md#navigationoptions12) | No   | Navigation options.|

**Return value**

| Type               | Description       |
| ------------------- | --------- |
| Promise\<void\> | Promise used to return the result.|

**Error codes**

For details about the error codes, see [Universal Error Codes](../../errorcode-universal.md) and [Router Error Codes](../errorcode-router.md).

| ID  | Error Message|
| --------- | ------- |
| 401      | Parameter error. Possible causes: 1. Mandatory parameters are left unspecified. 2. Incorrect parameters types. 3. Parameter verification failed.   |
| 100001    | Internal error.|
| 100005    | Builder function not registered. |
| 100006    | NavDestination not found.|
| 300001    | hsp silent install fail.|

### pushDestinationByName

pushDestinationByName(moduleName: string, name: string, param: Object, animated?: boolean): Promise\<void\>

Checks for the target subpackgae and, if it is not present, initiates a download using the specified module name. Once the subpackage is downloaded, the API pushes the [NavDestination](ts-basic-components-navdestination.md) page, as indicated by **name**, onto the navigation stack, along with the data specified by **param**. This API uses a promise to return the result.

**Atomic service API**: This API can be used in atomic services since API version 12.

**System capability**: SystemCapability.ArkUI.ArkUI.Full

**Parameters**

| Name   | Type     | Mandatory  | Description                   |
| ----- | ------- | ---- | --------------------- |
| moduleName | string | Yes   | Module name of the package where the [NavDestination](ts-basic-components-navdestination.md) page is located.|
| name  | string  | Yes   | Name of the [NavDestination](ts-basic-components-navdestination.md) page.  |
| param | Object | Yes   | Settings of the [NavDestination](ts-basic-components-navdestination.md) page.|
| animated | boolean | No   | Whether to support transition animation.<br>Default value: **true**|

**Return value**

| Type               | Description       |
| ------------------- | --------- |
| Promise\<void\> | Promise used to return the result.|

**Error codes**

For details about the error codes, see [Universal Error Codes](../../errorcode-universal.md) and [Router Error Codes](../errorcode-router.md).

| ID  | Error Message|
| --------- | ------- |
| 401      | Parameter error. Possible causes: 1. Mandatory parameters are left unspecified. 2. Incorrect parameters types. 3. Parameter verification failed.  |
| 100001    | Internal error.|
| 100005    | Builder function not registered. |
| 100006    | NavDestination not found.|
| 300001    | hsp silent install fail.|

### pushDestinationByName

pushDestinationByName(moduleName: string, name: string, param: Object, onPop: Callback\<PopInfo>, animated?: boolean): Promise\<void\>

Checks for the target subpackgae and, if it is not present, initiates a download using the specified module name. Once the subpackage is downloaded, the API pushes the [NavDestination](ts-basic-components-navdestination.md) page, as indicated by **name**, onto the navigation stack, along with the data specified by **param**. The **onPop** callback handles the return results when the page is popped from the stack.This API uses a promise to return the result.

**Atomic service API**: This API can be used in atomic services since API version 12.

**System capability**: SystemCapability.ArkUI.ArkUI.Full

**Parameters**

| Name   | Type     | Mandatory  | Description                 |
| ----- | ------- | ---- | --------------------- |
| moduleName | string | Yes   | Module name of the package where the [NavDestination](ts-basic-components-navdestination.md) page is located.|
| name  | string  | Yes   | Name of the [NavDestination](ts-basic-components-navdestination.md) page.  |
| param | Object | Yes   | Settings of the [NavDestination](ts-basic-components-navdestination.md) page.|
| onPop | Callback\<[PopInfo](ts-basic-components-navigation.md#popinfo11)> | Yes   | Callback used to handle the result returned when the page is popped out of the stack.|
| animated | boolean | No   | Whether to support transition animation.<br>Default value: **true**|

**Return value**

| Type               | Description       |
| ------------------- | --------- |
| Promise\<void\> | Promise used to return the result.|

**Error codes**

For details about the error codes, see [Universal Error Codes](../../errorcode-universal.md) and [Router Error Codes](../errorcode-router.md).

| ID  | Error Message|
| --------- | ------- |
| 401      | Parameter error. Possible causes: 1. Mandatory parameters are left unspecified. 2. Incorrect parameters types. 3. Parameter verification failed.  |
| 100001    | Internal error.|
| 100005    | Builder function not registered. |
| 100006    | NavDestination not found.|
| 300001    | hsp silent install fail.|

### replacePath

replacePath(moduleName: string, info: NavPathInfo, animated?: boolean): Promise\<void\>

Checks for the target subpackgae and, if it is not present, initiates a download using the specified module name. Once the subpackage is downloaded, the API pops the top page from the current navigation stack and pushes the [NavDestination](ts-basic-components-navdestination.md) page, as indicated by **info**, onto the stack. This API uses a promise to return the result.

**Atomic service API**: This API can be used in atomic services since API version 12.

**System capability**: SystemCapability.ArkUI.ArkUI.Full

**Parameters**

| Name | Type                           | Mandatory  | Description                  |
| ---- | ----------------------------- | ---- | -------------------- |
| moduleName | string | Yes   | Module name of the package where the [NavDestination](ts-basic-components-navdestination.md) page is located.|
| info | [NavPathInfo](ts-basic-components-navigation.md#navpathinfo10) | Yes   | Parameters of the page to replace the top of the navigation stack.|
| animated | boolean | No   | Whether to support transition animation.<br>Default value: **true**|

**Return value**

| Type               | Description       |
| ------------------- | --------- |
| Promise\<void\> | Promise used to return the result.|

**Error codes**

For details about the error codes, see [Router Error Codes](../errorcode-router.md).

| ID  | Error Message|
| --------- | ------- |
| 300001    | hsp silent install fail.|

### replacePath

replacePath(moduleName: string, info: NavPathInfo, options?: NavigationOptions): Promise\<void\>

Checks for the target subpackgae and, if it is not present, initiates a download using the specified module name. Once the subpackage is downloaded, the API pops the top page from the current navigation stack and pushes the [NavDestination](ts-basic-components-navdestination.md) page, as indicated by **info**, onto the stack. This API uses a promise to return the result. The behavior can vary based on [LaunchMode](ts-basic-components-navigation.md#launchmode12) specified in the **options** parameter.

**Atomic service API**: This API can be used in atomic services since API version 12.

**System capability**: SystemCapability.ArkUI.ArkUI.Full

**Parameters**

| Name  | Type                           | Mandatory  | Description                  |
| ---- | ----------------------------- | ---- | -------------------- |
| moduleName | string | Yes   | Module name of the package where the [NavDestination](ts-basic-components-navdestination.md) page is located.|
| info | [NavPathInfo](ts-basic-components-navigation.md#navpathinfo10) | Yes   | Parameters of the page to replace the top of the navigation stack.|
| options | [NavigationOptions](ts-basic-components-navigation.md#navigationoptions12) | No   | Navigation options.|

**Return value**

| Type               | Description       |
| ------------------- | --------- |
| Promise\<void\> | Promise used to return the result.|

**Error codes**

For details about the error codes, see [Router Error Codes](../errorcode-router.md).

| ID  | Error Message|
| --------- | ------- |
| 300001    | hsp silent install fail.|

### replacePathByName

replacePathByName(moduleName: string, name: string, param: Object, animated?: boolean): Promise\<void\>

Checks for the target subpackgae and, if it is not present, initiates a download using the specified module name. Once the subpackage is downloaded, the API pops the top page from the current navigation stack and pushes the [NavDestination](ts-basic-components-navdestination.md) page, as indicated by **name**, onto the stack. This API uses a promise to return the result.

**Atomic service API**: This API can be used in atomic services since API version 12.

**System capability**: SystemCapability.ArkUI.ArkUI.Full

**Parameters**

| Name   | Type     | Mandatory  | Description                  |
| ----- | ------- | ---- | --------------------- |
| moduleName | string | Yes   | Module name of the package where the [NavDestination](ts-basic-components-navdestination.md) page is located.|
| name  | string  | Yes   | Name of the [NavDestination](ts-basic-components-navdestination.md) page.  |
| param | Object | Yes   | Settings of the [NavDestination](ts-basic-components-navdestination.md) page.|
| animated | boolean | No   | Whether to support transition animation.<br>Default value: **true**|

**Return value**

| Type               | Description       |
| ------------------- | --------- |
| Promise\<void\> | Promise used to return the result.|

**Error codes**

For details about the error codes, see [Router Error Codes](../errorcode-router.md).

| ID  | Error Message|
| --------- | ------- |
| 300001    | hsp silent install fail.|

## Events

The [universal events](ts-universal-events-click.md) are not supported.

## Example

Main package:
```ts
// Index.ets
import { NavPushPathHelper } from '@kit.ArkUI'
import { BusinessError } from '@kit.BasicServicesKit';
@Entry
@Component
struct NavigationExample {
  pageInfo: NavPathStack = new NavPathStack()
  helper: NavPushPathHelper = new NavPushPathHelper(this.pageInfo)

  build() {
    Navigation(this.pageInfo) {
      Column() {
        Button('StartTest', { stateEffect: true, type: ButtonType.Capsule })
          .width('80%')
          .height(40)
          .margin(20)
          .onClick(() => {
            this.helper.pushPath('hsptest1', { name: 'pageOne' }, false)
              .catch((error: BusinessError) => {
              console.error(`[pushPath]failed, error code = ${error.code}, error.message = ${error.message}.`);
            }).then(() => {
              console.error('[pushPath]success.');
            }); // Push the NavDestination page specified by name to the navigation stack.
          })
      }
    }.title('NavIndex')
  }
}
```
Subpackage **hsptest1**:
```ts
// PageOne.ets
import { NavPushPathHelper } from '@kit.ArkUI'
import { BusinessError } from '@kit.BasicServicesKit';

class TmpClass {
  count: number = 10
}

class ParamWithOp {
  operation: number = 1
  count: number = 10
}

@Builder
export function PageOneBuilder(name: string, param: Object) {
  PageOne()
}

@Component
export struct PageOne {
  pageInfo: NavPathStack = new NavPathStack();
  helper: NavPushPathHelper = new NavPushPathHelper(this.pageInfo)
  @State message: string = 'Hello World'

  build() {
    NavDestination() {
      Column() {
        Text(this.message)
          .width('80%')
          .height(50)
          .margin(10)

        Button('pushPath', { stateEffect: true, type: ButtonType.Capsule })
          .width('80%')
          .height(35)
          .margin(10)
          .onClick(() => {
            this.helper.pushPath('hsptest2', { name: 'pageTwo', param: new ParamWithOp(), onPop: (popInfo: PopInfo) => {
              this.message = '[pushPath]last page is: ' + popInfo.info.name + ', result: ' + JSON.stringify(popInfo.result);
            }}).catch((error: BusinessError) => {
              console.error(`[pushPath]failed, error code = ${error.code}, error.message = ${error.message}.`);
            }).then(() => {
              console.log('[pushPath]success.');
            });
          })

        Button('pushPath with NavigationOptions', { stateEffect: true, type: ButtonType.Capsule })
          .width('80%')
          .height(35)
          .margin(10)
          .onClick(() => {
            this.helper.pushPath('hsptest2', { name: 'pageTwo', param: new ParamWithOp(), onPop: (popInfo: PopInfo) => {
              this.message = '[pushPath with NavigationOptions]last page is: ' + popInfo.info.name + ', result: ' + JSON.stringify(popInfo.result);
            }}, {launchMode:0, animated:true}).catch((error: BusinessError) => {
              console.error(`[pushPath with NavigationOptions]failed, error code = ${error.code}, error.message = ${error.message}.`);
            }).then(() => {
              console.log('[pushPath with NavigationOptions]success.');
            });
          })

        Button('pushPathByName', { stateEffect: true, type: ButtonType.Capsule })
          .width('80%')
          .height(35)
          .margin(10)
          .onClick(() => {
            let tmp = new TmpClass()
            this.helper.pushPathByName('hsptest2', 'pageTwo', tmp, (popInfo) => {
              this.message = '[pushPathByName]last page is: ' + popInfo.info.name + ', result: ' + JSON.stringify(popInfo.result);
            }).catch((error: BusinessError) => {
              console.error(`[pushPathByName]failed, error code = ${error.code}, error.message = ${error.message}.`);
            }).then(() => {
              console.log('[pushPathByName]success.');
            });
          })

        Button('pushPathByNameWithoutOnPop', { stateEffect: true, type: ButtonType.Capsule })
          .width('80%')
          .height(35)
          .margin(10)
          .onClick(() => {
            let tmp = new TmpClass()
            this.helper.pushPathByName('hsptest2', 'pageTwo', tmp, true)
            .catch((error: BusinessError) => {
              console.error(`[pushPathByNameWithoutOnPop]failed, error code = ${error.code}, error.message = ${error.message}.`);
            }).then(() => {
              console.log('[pushPathByNameWithoutOnPop]success.');
            });
          })

        Button('pushDestination', { stateEffect: true, type: ButtonType.Capsule })
          .width('80%')
          .height(35)
          .margin(10)
          .onClick(() => {
            let tmp = new TmpClass()
            this.helper.pushDestination('hsptest2', { name: 'pageTwo', param: new ParamWithOp(), onPop: (popInfo: PopInfo) => {
              this.message = '[pushDestination]last page is: ' + popInfo.info.name + ', result: ' + JSON.stringify(popInfo.result);
            }}).catch((error: BusinessError) => {
              console.error(`[pushDestination]failed, error code = ${error.code}, error.message = ${error.message}.`);
            }).then(() => {
              console.error('[pushDestination]success.');
            });
          })

        Button('pushDestination with NavigationOptions', { stateEffect: true, type: ButtonType.Capsule })
          .width('80%')
          .height(35)
          .margin(10)
          .onClick(() => {
            let tmp = new TmpClass()
            this.helper.pushDestination('hsptest2', { name: 'pageTwo', param: new ParamWithOp(), onPop: (popInfo: PopInfo) => {
              this.message = '[pushDestination with NavigationOptions]last page is: ' + popInfo.info.name + ', result: ' + JSON.stringify(popInfo.result);
            }}, {launchMode:0, animated:true}).catch((error: BusinessError) => {
              console.error(`[pushDestination with NavigationOptions]failed, error code = ${error.code}, error.message = ${error.message}.`);
            }).then(() => {
              console.error('[pushDestination with NavigationOptions]success.');
            });
          })

        Button('pushDestinationByName', { stateEffect: true, type: ButtonType.Capsule })
          .width('80%')
          .height(35)
          .margin(10)
          .onClick(() => {
            let tmp = new TmpClass()
            this.helper.pushDestinationByName('hsptest2','pageTwo', tmp, (popInfo) => {
              this.message = '[pushDestinationByName]last page is: ' + popInfo.info.name + ', result: ' + JSON.stringify(popInfo.result);
            }).catch((error: BusinessError) => {
              console.error(`[pushDestinationByName]failed, error code = ${error.code}, error.message = ${error.message}.`);
            }).then(() => {
              console.error('[pushDestinationByName]success.');
            });
          })

        Button('pushDestinationByNameWithoutOnPop', { stateEffect: true, type: ButtonType.Capsule })
          .width('80%')
          .height(35)
          .margin(10)
          .onClick(() => {
            let tmp = new TmpClass()
            this.helper.pushDestinationByName('hsptest2','pageTwo', tmp, true)
              .catch((error: BusinessError) => {
                console.error(`[pushDestinationByNameWithoutOnPop]failed, error code = ${error.code}, error.message = ${error.message}.`);
              }).then(() => {
              console.error('[pushDestinationByNameWithoutOnPop]success.');
            });
          })

        Button('replacePath', { stateEffect: true, type: ButtonType.Capsule })
          .width('80%')
          .height(35)
          .margin(10)
          .onClick(() => {
            this.helper.replacePath('hsptest2', { name: 'pageTwo', param: new ParamWithOp(), onPop: (popInfo: PopInfo) => {
              this.message = '[replacePath]last page is: ' + popInfo.info.name + ', result: ' + JSON.stringify(popInfo.result);
            }}).catch((error: BusinessError) => {
              console.error(`[replacePath]failed, error code = ${error.code}, error.message = ${error.message}.`);
            }).then(() => {
              console.log('[replacePath]success.');
            });
          })

        Button('replacePath with NavigationOptions', { stateEffect: true, type: ButtonType.Capsule })
          .width('80%')
          .height(35)
          .margin(10)
          .onClick(() => {
            this.helper.replacePath('hsptest2', { name: 'pageTwo', param: new ParamWithOp(), onPop: (popInfo: PopInfo) => {
              this.message = '[replacePath with NavigationOptions]last page is: ' + popInfo.info.name + ', result: ' + JSON.stringify(popInfo.result);
            }}, {launchMode:0, animated:true}).catch((error: BusinessError) => {
              console.error(`[replacePath with NavigationOptions]failed, error code = ${error.code}, error.message = ${error.message}.`);
            }).then(() => {
              console.log('[replacePath with NavigationOptions]success.');
            });
          })

        Button('replacePathByName', { stateEffect: true, type: ButtonType.Capsule })
          .width('80%')
          .height(35)
          .margin(10)
          .onClick(() => {
            let tmp = new TmpClass()
            this.helper.replacePathByName('hsptest2', 'pageTwo', tmp)
              .catch((error: BusinessError) => {
              console.error(`[replacePathByName]failed, error code = ${error.code}, error.message = ${error.message}.`);
            }).then(() => {
              console.log('[replacePathByName]success.');
            });
          })

      }.width('100%').height('100%')
    }.title('pageOne')
    .onBackPressed(() => {
      this.pageInfo.pop({ number: 1 }) // Pop the top element out of the navigation stack.
      return true
    }).onReady((context: NavDestinationContext) => {
      this.pageInfo = context.pathStack;
      this.helper = new NavPushPathHelper(this.pageInfo);
    })
  }
}
```

```json
// Configure {"routerMap": "$profile:route_map"} in the project configuration file module.json5.
// route_map.json
{
  "routerMap": [
    {
      "name": "pageOne",
      "pageSourceFile": "src/main/ets/pages/PageOne.ets",
      "buildFunction": "PageOneBuilder",
      "data": {
        "description": "this is pageOne"
      }
    }
  ]
}
```

Subpackage **hsptest2**:
```ts
// PageTwo.ets

class resultClass {
  constructor(count: number) {
    this.count = count;
  }
  count: number = 10
}

@Builder
export function PageTwoBuilder() {
  PageTwo()
}

@Component
export struct PageTwo {
  pathStack: NavPathStack = new NavPathStack()

  build() {
    NavDestination() {
      Column() {
        Button('pop', { stateEffect: true, type: ButtonType.Capsule })
          .width('80%')
          .height(40)
          .margin(20)
          .onClick(() => {
            this.pathStack.pop(new resultClass(1)); // Return to the previous page and pass in the processing result to the onPop callback of push.
          })
      }.width('100%').height('100%')
    }.title('pageTwo')
    .onBackPressed(() => {
      this.pathStack.pop(new resultClass(0)); // Return to the previous page and pass in the processing result to the onPop callback of push.
      return true;
    }).onReady((context: NavDestinationContext) => {
      this.pathStack = context.pathStack
    })
  }
}
```

```json
// Configure {"routerMap": "$profile:route_map"} in the project configuration file module.json5.
// route_map.json
{
  "routerMap": [
    {
      "name": "pageTwo",
      "pageSourceFile": "src/main/ets/pages/PageTwo.ets",
      "buildFunction": "PageTwoBuilder",
      "data": {
        "description": "this is pageTwo"
      }
    }
  ]
}
```
![NavPushPathHelperDemo.gif](figures/NavPushPathHelperDemo.gif)