@qwik.dev/core/dist/backpatch-executor.debug.js

An open source framework for building instant loading web apps at any scale, without the extra effort.

const BACKPATCH_DATA_SELECTOR = 'script[type="qwik/backpatch"]';
const executorScript = document.currentScript;
if (executorScript) {
  const container = executorScript.closest(
    "[q\\:container]:not([q\\:container=html]):not([q\\:container=text])"
  );
  if (container) {
    const script = container.querySelector(BACKPATCH_DATA_SELECTOR);
    if (script) {
      const data = JSON.parse(script.textContent || "[]");
      const walker = document.createTreeWalker(container, NodeFilter.SHOW_ELEMENT);
      let currentNode = walker.currentNode;
      let currentNodeIdx = currentNode.hasAttribute(":") ? 0 : -1;
      for (let i = 0; i < data.length; i += 3) {
        const elementIdx = data[i];
        const attrName = data[i + 1];
        let value = data[i + 2];
        while (currentNodeIdx < elementIdx) {
          currentNode = walker.nextNode();
          if (!currentNode) {
            break;
          }
          if (currentNode.hasAttribute(":")) {
            currentNodeIdx++;
          }
        }
        const element = currentNode;
        if (value == null || value === false) {
          element.removeAttribute(attrName);
        } else {
          if (typeof value === "boolean") {
            value = "";
          }
          element.setAttribute(attrName, value);
        }
      }
    }
  }
}