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69
packages/core/src/components/discord-header/DiscordHeader.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,69 @@ | ||
| import { css, html, LitElement } from 'lit'; | ||
| import { customElement, property } from 'lit/decorators.js'; | ||
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|
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| @customElement('discord-header') | ||
| export class DiscordHeader extends LitElement { | ||
| public static override styles = css` | ||
| :host { | ||
| margin: 16px 0 8px; | ||
| font-weight: 700; | ||
| line-height: 1.375em; | ||
| } | ||
| :host([level='1']) { | ||
| font-size: 1.5rem; | ||
| } | ||
| :host([level='2']) { | ||
| font-size: 1.25rem; | ||
| } | ||
| :host([level='3']) { | ||
| font-size: 1rem; | ||
| } | ||
| :host([level='1']):first-child(), | ||
| :host([level='2']):first-child() { | ||
| margin-top: 8px; | ||
| } | ||
| :host([level='3']):first-child() { | ||
| margin-top: 4px; | ||
| } | ||
| `; | ||
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|
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| /** | ||
| * The header level, this should be a number between 1 and 3 (inclusive). | ||
| * If a number outside of this range is provided, an error is thrown. | ||
| */ | ||
| @property({ type: Number, reflect: true }) | ||
| public accessor level: 1 | 2 | 3 = 1; | ||
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| public checkLevel() { | ||
| if (this.level < 1 || this.level > 3) { | ||
| throw new RangeError('The level property must be a number between 1 and 3 (inclusive)'); | ||
| } | ||
| } | ||
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| protected override render() { | ||
| this.checkLevel(); | ||
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| switch (this.level) { | ||
| case 1: { | ||
| return html`<h1><slot></slot></h1>`; | ||
| } | ||
| case 2: { | ||
| return html`<h2><slot></slot></h2>`; | ||
| } | ||
| case 3: { | ||
| return html`<h3><slot></slot></h3>`; | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| declare global { | ||
| interface HTMLElementTagNameMap { | ||
| 'discord-header': DiscordHeader; | ||
| } | ||
| } |
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