Vanilla HTM

Framework-free JSX syntax in pure JS using HTM and native DOM creation.
Dieses Skript sollte nicht direkt installiert werden. Es handelt sich hier um eine Bibliothek für andere Skripte, welche über folgenden Befehl in den Metadaten eines Skriptes eingebunden wird // @require https://update.greasyfork.org/scripts/591770/1905406/Vanilla%20HTM.js
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// ==UserScript==
// @name        Vanilla HTM
// @namespace   Violentmonkey Scripts
// @version     1.0.0
// @require     https://cdn.jsdelivr.net/npm/[email protected]/mini/index.umd.js
// @grant       none
// @author      Paesss
// @description Framework-free JSX syntax in pure JS using HTM and native DOM creation.
// ==/UserScript==

(function (global) {
  "use strict";

  const SVG_NS = "http://www.w3.org/2000/svg";

  // Standard SVG tags requiring the SVG namespace
  const SVG_TAGS = new Set([
    "svg",
    "path",
    "circle",
    "rect",
    "line",
    "polyline",
    "polygon",
    "ellipse",
    "g",
    "use",
    "text",
    "tspan",
    "symbol",
    "defs",
    "clipPath",
    "mask",
    "pattern",
    "marker",
    "foreignObject",
  ]);

  /**
   * Appends dynamic children into a parent DOM container
   */
  function appendChildren(parent, children) {
    for (let i = 0; i < children.length; i++) {
      const child = children[i];

      if (child == null || child === false || child === true) {
        continue;
      }

      if (Array.isArray(child)) {
        appendChildren(parent, child);
      } else if (child instanceof Node) {
        parent.appendChild(child);
      } else {
        parent.appendChild(document.createTextNode(String(child)));
      }
    }
  }

  /**
   * Enhanced Hyperscript factory function
   */
  function h(tag, props, ...children) {
    // 1. Functional Components
    if (typeof tag === "function") {
      const normalizedProps = Object.assign({}, props);
      normalizedProps.children = children.length === 1 ? children[0] : children;
      return tag(normalizedProps);
    }

    // 2. Document Fragments (<>...</>)
    if (!tag) {
      const fragment = document.createDocumentFragment();
      appendChildren(fragment, children);
      return fragment;
    }

    // 3. Namespace Resolution (SVG Support)
    const isSvg = typeof tag === "string" && SVG_TAGS.has(tag);
    const el = isSvg
      ? document.createElementNS(SVG_NS, tag)
      : document.createElement(tag);

    // 4. Property & Attribute Binding
    if (props) {
      for (let key in props) {
        const val = props[key];

        if (val === undefined || val === null) continue;

        // Ref Callback / Object
        if (key === "ref") {
          if (typeof val === "function") val(el);
          else if (val && typeof val === "object") val.current = el;
          continue;
        }

        // Forced Property Set (.value, .checked, etc.)
        if (key.charCodeAt(0) === 46 /* '.' */) {
          el[key.slice(1)] = val;
          continue;
        }

        // Event Listeners (e.g. onClick, onInput)
        if (
          key.charCodeAt(0) === 111 /* 'o' */ &&
          key.charCodeAt(1) === 110 /* 'n' */
        ) {
          const eventName = key.slice(2).toLowerCase();
          el.addEventListener(eventName, val);
          continue;
        }

        // Attribute Normalization
        let attrName = key;
        if (key === "className") attrName = "class";
        else if (key === "htmlFor") attrName = "for";

        // Style Props (Object or String)
        if (key === "style") {
          if (typeof val === "object" && val !== null) {
            Object.assign(el.style, val);
          } else {
            el.style.cssText = String(val);
          }
          continue;
        }

        // Dataset Attributes
        if (key === "dataset" && typeof val === "object") {
          Object.assign(el.dataset, val);
          continue;
        }

        // Boolean Attributes
        if (typeof val === "boolean") {
          if (val) {
            el.setAttribute(attrName, "");
            if (attrName in el) el[attrName] = true;
          } else {
            el.removeAttribute(attrName);
            if (attrName in el) el[attrName] = false;
          }
          continue;
        }

        // Standard Properties vs Attributes
        if (
          attrName in el &&
          !isSvg &&
          attrName !== "list" &&
          attrName !== "form"
        ) {
          try {
            el[attrName] = val;
          } catch {
            el.setAttribute(attrName, String(val));
          }
        } else {
          el.setAttribute(attrName, String(val));
        }
      }
    }

    // 5. Append Children
    appendChildren(el, children);

    return el;
  }

  // Bind HTM to the hyperscript factory on the global scope
  global.html = typeof htm !== "undefined" ? htm.bind(h) : null;

})(
  // Universal Global Scope Resolution
  typeof globalThis !== "undefined" ? globalThis :
  typeof window !== "undefined" ? window :
  typeof self !== "undefined" ? self :
  this || {}
);