# Function: writeJson ▸ **writeJson**<`T`\>(`tree`, `path`, `value`, `options?`): `void` Writes a JSON value to the file system tree #### Type parameters | Name | Type | | :--- | :-------------------------- | | `T` | extends `object` = `object` | #### Parameters | Name | Type | Description | | :--------- | :-------------------------------------------------------------------- | :------------------------------ | | `tree` | [`Tree`](../../devkit/documents/Tree) | File system tree | | `path` | `string` | Path of JSON file in the Tree | | `value` | `T` | Serializable value to write | | `options?` | [`JsonSerializeOptions`](../../devkit/documents/JsonSerializeOptions) | Optional JSON Serialize Options | #### Returns `void`