1# Configuring Widget Configuration Files
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3
4Widget-related configuration includes **FormExtensionAbility** configuration and widget configuration.
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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.
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9   Example configuration:
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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": "$profile:form_config"
27             }
28           ]
29         }
30       ]
31     }
32   }
33   ```
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352. Configure the widget configuration information. In the **metadata** configuration item of FormExtensionAbility, you can specify the resource index of specific configuration information of the widget. For example, if **resource** is set to **$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.
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37   **Table 1** form_config.json file
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39   | Field | Description | Data Type | Default Value Allowed |
40   | -------- | -------- | -------- | -------- |
41   | name | Name of the widget. The value is a string with a maximum of 127 bytes. | String | No |
42   | displayName | Display name of the widget. The value can be a string or a resource index to the name in multiple languages. The string must contain 1 to 30 bytes. | String | Yes |
43   | 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) |
44   | 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 |
45   | uiSyntax | Type of the widget.<br>- **arkts**: ArkTS widget<br>- **hml**: JS widget | String | Yes (initial value: **hml**) |
46   | window | Window-related configurations. | Object | Yes (initial value: see Table 2) |
47   | 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 |
48   | 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**) |
49   | 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.<br>- **1 * 1**: indicates a round widget with one row and one column.<br>- **6 * 4**: indicates a grid with six rows and four columns. | String array | No |
50   | defaultDimension | Default grid style of the widget. The value must be available in the **supportDimensions** array of the widget. | String | No |
51   | 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 |
52   | 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.) |
53   | 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**) |
54   | formConfigAbility | Link to a specific page of the application. The value is a URI.| String | Yes (initial value: left empty) |
55   | metadata | Metadata of the widget. For details, see [Metadata](../reference/apis-ability-kit/js-apis-bundleManager-metadata.md). | Object | Yes (initial value: left empty) |
56   | dataProxyEnabled | Whether the widget supports the update-through-proxy 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   | formVisibleNotify | Whether the widget is allowed to use the widget visibility notification. This parameter is valid only for widgets of system applications. | Boolean | Yes (initial value: **false**) |
59   | transparencyEnabled | Whether the widget host is allowed to set the background transparency of the widget. This tag applies only to ArkTS widgets.  <br>- **true**: The widget host is allowed to set the background transparency of the widget.<br>- **false**: The widget host is not allowed to set the background transparency of the widget.<br>| Boolean | Yes (initial value: **false**) |
60   | fontScaleFollowSystem | Whether the font size of the widget changes with the system font size.<br>- **true**: The font size varies with the system font size.<br>- **false**: The font size cannot change with the system font size.<br>| Boolean | Yes (initial value: **true**) |
61   | supportShapes | Shapes that the widget can be displayed. The options are as follows:<br>- **rect**: square widget.<br>- **circle**: circular widget.| String | Yes (initial value: **rect**) |
62
63   **Table 2** Internal structure of the window object
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65   | Field | Description | Data Type | Default Value Allowed |
66   | -------- | -------- | -------- | -------- |
67   | designWidth | Baseline width for page design. The size of an element is scaled by the actual device width. | Number | Yes (initial value: **720px**) |
68   | 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**) |
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70   Example configuration:
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72
73   ```json
74   {
75     "forms": [
76       {
77         "name": "widget",
78         "displayName": "$string:widget_display_name",
79         "description": "$string:widget_desc",
80         "src": "./ets/widget/pages/WidgetCard.ets",
81         "uiSyntax": "arkts",
82         "window": {
83           "designWidth": 720,
84           "autoDesignWidth": true
85         },
86         "colorMode": "auto",
87         "isDefault": true,
88         "updateEnabled": true,
89         "scheduledUpdateTime": "10:30",
90         "updateDuration": 1,
91         "defaultDimension": "2*2",
92         "supportDimensions": [
93           "2*2"
94         ],
95         "formConfigAbility": "ability://EntryAbility",
96         "dataProxyEnabled": false,
97         "isDynamic": true,
98         "transparencyEnabled": false,
99         "metadata": []
100       }
101     ]
102   }
103   ```
104