Let's start with a simple "Hello, world!" example in a helloWorld.cmp component.
<aura:component> Hello, world! </aura:component>
This is about as simple as a component can get. The "Hello, world!" text is wrapped in the <aura:component> tags, which appear at the beginning and end of every component definition.
Components can contain most HTML tags so you can use markup, such as <div> and <span>. HTML5 tags are also supported.
<aura:component> <div class="container"> <!--Other HTML tags or components here--> </div> </aura:component>
Use the Developer Console to create components.
A component name must follow these naming rules: