Use

To use <can-slot> we can create a Component that has <can-slot> elements in it's view and render that component with <can-template> elements in the LIGHT_DOM.

Any <can-slot> that has a name attribute matching the name attribute of a <can-template> will be replaced by the rendered inner contents of the <can-template>.

import Component from "can-component";
import stache from "can-stache";

Component.extend( {
    tag: "my-email",
    view: `
        <can-slot name="subject" />
        <p>My Email</p>
        <can-slot name="body" />
    `
} );

const renderer = stache(`
    <my-email>
        <can-template name="subject">
            <h1>{{subject}}</h1>
        </can-template>
        <can-template name="body">
            <span>{{body}}</span>
        </can-template>
    </my-email>
`);

renderer( {
    subject: "Hello World",
    body: "The email body"
} );

/*
<my-email>
    <h1>Hello World</h1>
    <p>My Email</p>
    <span>The email body</span>
</my-email>
*/

Passing context

Context (this) can be bound to and passed to a template. The following passes <my-email>'s subject and body to the subject and body templates. Notice how subject and body are read by {{this}}.

import Component from "can-component";
import stache from "can-stache";

Component.extend( {
    tag: "my-email",
    view: `
        <can-slot name="subject" this:from="subject" />
        <can-slot name="body" this:from="body" />
    `,
    ViewModel: {
        subject: {
            default: "Hello World"
        },
        body: {
            default: "Later Gator"
        }
    }
} );

const renderer = stache(`
    <my-email>
        <can-template name="subject">
            <h1>{{this}}</h1>
        </can-template>
        <can-template name="body">
            <span>{{this}}</span>
        </can-template>
    </my-email>
`);

const testView = renderer( {
    subject: "Hello World",
    body: "This is a greeting."
} );

/*
<my-email>
    <h1>Hello World</h1>
    <p>This is a greeting.</p>
</my-email>
*/

Default content

Default content can be specified to be used if there is no matching <can-template> or the matching <can-template> has no inner content.

import Component from "can-component";
import stache from "can-stache";

Component.extend( {
    tag: "my-email",
    view: `
        <can-slot name="subject">
            <p>This is the default {{subject}}</p>
        </can-slot>
    `
} );

const renderer = stache(`
    <my-email>
        <can-template name="subject" />
    </my-email>
`);

const testView = renderer( {
    subject: "content"
} );

/*
<my-email>
    <p>This is the default content</p>
</my-email>
*/