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| /* | |
| * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com> | |
| * | |
| * Permission is hereby granted, free of charge, to any person obtaining a copy | |
| * of this software and associated documentation files (the "Software"), to | |
| * deal in the Software without restriction, including without limitation the | |
| * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or | |
| * sell copies of the Software, and to permit persons to whom the Software is | |
| * furnished to do so, subject to the following conditions: | |
| * | |
| * The above copyright notice and this permission notice shall be included in | |
| * all copies or substantial portions of the Software. | |
| * | |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE | |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
| * IN THE SOFTWARE. | |
| */ | |
| // tslint:disable no-null-keyword | |
| import { JSX as JSXInternal } from "preact" | |
| /* ---------------------------------------------------------------------------- | |
| * Helper types | |
| * ------------------------------------------------------------------------- */ | |
| /** | |
| * HTML attributes | |
| */ | |
| type Attributes = | |
| & JSXInternal.HTMLAttributes | |
| & JSXInternal.SVGAttributes | |
| & Record<string, any> | |
| /** | |
| * Child element | |
| */ | |
| type Child = | |
| | HTMLElement | |
| | Text | |
| | string | |
| | number | |
| /* ---------------------------------------------------------------------------- | |
| * Helper functions | |
| * ------------------------------------------------------------------------- */ | |
| /** | |
| * Append a child node to an element | |
| * | |
| * @param el - Element | |
| * @param child - Child node(s) | |
| */ | |
| function appendChild(el: HTMLElement, child: Child | Child[]): void { | |
| /* Handle primitive types (including raw HTML) */ | |
| if (typeof child === "string" || typeof child === "number") { | |
| el.innerHTML += child.toString() | |
| /* Handle nodes */ | |
| } else if (child instanceof Node) { | |
| el.appendChild(child) | |
| /* Handle nested children */ | |
| } else if (Array.isArray(child)) { | |
| for (const node of child) | |
| appendChild(el, node) | |
| } | |
| } | |
| /* ---------------------------------------------------------------------------- | |
| * Functions | |
| * ------------------------------------------------------------------------- */ | |
| /** | |
| * JSX factory | |
| * | |
| * @param tag - HTML tag | |
| * @param attributes - HTML attributes | |
| * @param children - Child elements | |
| * | |
| * @return Element | |
| */ | |
| export function h( | |
| tag: string, attributes: Attributes | null, ...children: Child[] | |
| ): HTMLElement { | |
| const el = document.createElement(tag) | |
| /* Set attributes, if any */ | |
| if (attributes) | |
| for (const attr of Object.keys(attributes)) | |
| if (typeof attributes[attr] !== "boolean") | |
| el.setAttribute(attr, attributes[attr]) | |
| else if (attributes[attr]) | |
| el.setAttribute(attr, "") | |
| /* Append child nodes */ | |
| for (const child of children) | |
| appendChild(el, child) | |
| /* Return element */ | |
| return el | |
| } | |
| /* ---------------------------------------------------------------------------- | |
| * Namespace | |
| * ------------------------------------------------------------------------- */ | |
| export declare namespace h { | |
| namespace JSX { | |
| type Element = HTMLElement | |
| type IntrinsicElements = JSXInternal.IntrinsicElements | |
| } | |
| } |