grind-assets/lib/Devtools/Browser/LiveReloader/CssReloader.js

Asset management for Grind

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.CssReloader = CssReloader;

var _cacheBust = require("../Support/cacheBust.js");

function CssReloader(pathname) {
  const reload = [];

  for (let i = 0, length = document.styleSheets.length; i < length; i++) {
    const sheet = document.styleSheets[i];

    if (findFiles(sheet).indexOf(pathname) === -1) {
      continue;
    }

    reload.push(sheet);
  }

  for (let j = 0, length2 = reload.length; j < length2; j++) {
    const link = reload[j].ownerNode;
    const replacement = link.cloneNode();
    replacement.href = (0, _cacheBust.cacheBust)(replacement.href);
    replacement.addEventListener('load', () => {
      link.remove();
    }, false);
    replacement.addEventListener('error', () => {
      replacement.remove();
    }, false);
    link.parentNode.insertBefore(replacement, link);
  }
}

function findFiles(stylesheet) {
  const rules = stylesheet.cssRules || [];

  for (let i = rules.length - 1; i >= 0; i--) {
    const rule = rules[i];

    if (rule.selectorText !== '#__liveReloadModule') {
      continue;
    }

    return JSON.parse(JSON.parse(rule.style.content));
  }

  return [];
}
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