| \n\nAdd alert notifications\n\n | \n\nAdd a code snippet to send an alert notification. For example: ```\nreturn {\n items: [{\"type\" : \"info\", \"message\" : \"Info message\", \"id\" : \"optionalID\"}] /* Types: info, warning, error */\n};\n\n```\n\n |
| \n\nRemove alert notification\n\n | \n\nAdd code to call alert notification IDs that you want to dismiss. For example, click a button to remove a page load alert notification.\n\n |
| \n\nClear alert notification\n\n | \n\nAdd code to call all alert notification IDs that you want to dismiss. For example, click a button to remove all alert notifications.\n\n |
| \n\nSet loading state\n\n | \n\nToggle loading on or off. For example, you can toggle loading on to load the page when you click a button or toggle loading off to not load the page when a button is clicked.\n\n |
| \n\nUpdate client state parameter\n\n | \n\nDeclaratively set the client state parameter. Let's say that you have a client state parameter that you set up with a value. You can configure the **Update client state parameter** event handler to update the client state parameter with a new value. For example, you have a client state parameter that is called **Greeting** that is set up with `Hello` as the initial value. You can add an **Update client state parameter** event handler, select the **Greeting** client state parameter, and then enter a new value like `Goodbye`. When you click the button, **Goodbye** replaces **Hello** on the page.\n\n |
| \n\nUXF macroponent viewport load requested\n\n | \n\nAdd to a component, such as a button component, to open a viewport. For more information, see [Add a viewport component to your page](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/application-development/ui-builder/work-with-viewport-components.md).\n\n |
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