1# Configuring Widget Configuration Files 2 3 4Widget-related configuration includes **FormExtensionAbility** configuration and widget configuration. 5 6 71. Configure FormExtensionAbility information under **extensionAbilities** in the [module.json5 file](../quick-start/module-configuration-file.md). For a FormExtensionAbility, you must specify **metadata**. Specifically, set **name** to **ohos.extension.form** (fixed), and set **resource** to the index of the widget configuration information. 8 9 Example configuration: 10 11 12 ```json 13 { 14 "module": { 15 ... 16 "extensionAbilities": [ 17 { 18 "name": "EntryFormAbility", 19 "srcEntry": "./ets/entryformability/EntryFormAbility.ets", 20 "label": "$string:EntryFormAbility_label", 21 "description": "$string:EntryFormAbility_desc", 22 "type": "form", 23 "metadata": [ 24 { 25 "name": "ohos.extension.form", 26 "resource": "$profile:form_config" 27 } 28 ] 29 } 30 ] 31 } 32 } 33 ``` 34 352. Configure the widget configuration information. In the **metadata** configuration item of FormExtensionAbility, you can specify the resource index of specific configuration information of the widget. For example, if **resource** is set to **$profile:form_config**, **form_config.json** in the **resources/base/profile/** directory of the development view is used as the profile configuration file of the widget. The following table describes the internal structure of the profile configuration file. 36 37 **Table 1** form_config.json file 38 39 | Field| Description| Data Type| Default Value Allowed| 40 | -------- | -------- | -------- | -------- | 41 | name | Class name of the widget. The value is a string with a maximum of 127 bytes.| String| No| 42 | description | Description of the widget. The value can be a string or a resource index to descriptions in multiple languages. The value is a string with a maximum of 255 bytes.| String| Yes (initial value: left empty)| 43 | src | Full path of the UI code corresponding to the widget. For an ArkTS widget, the full path must contain the widget file name extension, for example, **./ets/widget/pages/WidgetCard.ets**. For a JS widget, the full path does not need to contain the widget file name extension, for example, **./js/widget/pages/WidgetCard**.| String| No| 44 | uiSyntax | Type of the widget.<br>- **arkts**: ArkTS widget<br>- **hml**: JS widget| String| Yes (initial value: **hml**)| 45 | window | Window-related configurations.| Object| YYes (initial value: see Table 2)| 46 | isDefault | Whether the widget is a default one. Each UIAbility has only one default widget.<br>- **true**: The widget is the default one.<br>- **false**: The widget is not the default one.| Boolean| No| 47 | colorMode | Color mode of the widget.<br>- **auto**: following the system color mode<br>- **dark**: dark color mode<br>- **light**: light color mode| String| Yes (initial value: **auto**)| 48 | supportDimensions | Grid styles supported by the widget.<br>- **1 * 2**: indicates a grid with one row and two columns.<br>- **2 * 2**: indicates a grid with two rows and two columns.<br>- **2 * 4**: indicates a grid with two rows and four columns.<br>- **4 * 4**: indicates a grid with four rows and four columns.| String array| No| 49 | defaultDimension | Default grid style of the widget. The value must be available in the **supportDimensions** array of the widget.| String| No| 50 | updateEnabled | Whether the widget can be updated periodically.<br>- **true**: The widget can be updated at a specified interval (**updateDuration**) or at the scheduled time (**scheduledUpdateTime**). **updateDuration** takes precedence over **scheduledUpdateTime**. If both are specified, the value specified by **updateDuration** is used.<br>- **false**: The widget cannot be updated periodically.| Boolean| No| 51 | scheduledUpdateTime | Scheduled time to update the widget. The value is in 24-hour format and accurate to minute.<br>**NOTE**<br>**updateDuration** takes precedence over **scheduledUpdateTime**. If both are specified, the value specified by **updateDuration** is used.| String| Yes (initial value: The widget is not updated at the scheduled time.)| 52 | updateDuration | Interval to update the widget. The value is a natural number, in the unit of 30 minutes.<br>If the value is **0**, this field does not take effect.<br>If the value is a positive integer *N*, the interval is calculated by multiplying *N* and 30 minutes.<br>**NOTE**<br>**updateDuration** takes precedence over **scheduledUpdateTime**. If both are specified, the value specified by **updateDuration** is used.| Number| Yes (initial value: **0**)| 53 | formConfigAbility | Link to a specific page of the application. The value is a URI.| String| Yes (initial value: left empty)| 54 | formVisibleNotify | Whether the widget is allowed to use the widget visibility notification.| String| Yes (initial value: left empty)| 55 | metadata | Metadata of the widget. For details, see [Metadata](../reference/apis/js-apis-bundleManager-metadata.md).| Object| Yes (initial value: left empty)| 56 | dataProxyEnabled | Whether the widget supports the [update-through-proxy](./arkts-ui-widget-update-by-proxy.md) feature.<br>- **true**: The widget supports the update-through-proxy feature.<br>- **false**: The widget does not support the update-through-proxy feature.<br>If this tag is set to **true**, [the settings for the scheduled update time will still take effect, but the settings for the update interval and next update time will not](./arkts-ui-widget-update-by-time.md).| Boolean| Yes (initial value: **false**)| 57 | isDynamic | Whether the widget is a dynamic widget. This tag applies only to ArkTS widgets.<br>- **true**: The widget is a dynamic widget.<br>- **false**: The widget is a static widget.<br>| Boolean| Yes (initial value: **true**)| 58 59 **Table 2** Internal structure of the window object 60 61 | Field| Description| Data Type| Default Value Allowed| 62 | -------- | -------- | -------- | -------- | 63 | designWidth | Baseline width for page design. The size of an element is scaled by the actual device width.| Number| Yes (initial value: **720px**)| 64 | autoDesignWidth | Whether to automatically calculate the baseline width for page design. If it is set to **true**, the **designWidth** attribute will be ignored, and the baseline width will be calculated based on the device width and screen density.| Boolean| Yes (initial value: **false**)| 65 66 Example configuration: 67 68 69 ```json 70 { 71 "forms": [ 72 { 73 "name": "widget", 74 "description": "This is a service widget.", 75 "src": "./ets/widget/pages/WidgetCard.ets", 76 "uiSyntax": "arkts", 77 "window": { 78 "designWidth": 720, 79 "autoDesignWidth": true 80 }, 81 "colorMode": "auto", 82 "isDefault": true, 83 "updateEnabled": true, 84 "scheduledUpdateTime": "10:30", 85 "updateDuration": 1, 86 "defaultDimension": "2*2", 87 "supportDimensions": [ 88 "2*2" 89 ], 90 "formConfigAbility": "", 91 "formVisibleNotify": "", 92 "dataProxyEnabled": false, 93 "metadata": {} 94 } 95 ] 96 } 97 ``` 98