@ciolabs/html-find-conditional-comments/dist/index.js

Finds all conditional comments in a string

"use strict";
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from))
      if (!__hasOwnProp.call(to, key) && key !== except)
        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  }
  return to;
};
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);

// src/index.ts
var index_exports = {};
__export(index_exports, {
  default: () => findConditionalComments
});
module.exports = __toCommonJS(index_exports);
var OPEN_REGEX = /<!(--)?\[if\s[\s\w!&()|]+]>(?:<!--+>)?/gi;
var CLOSE_REGEX = /(?:<!--)?<!\[endif](--)?>/gi;
function findConditionalComments(string_) {
  const comments = [];
  const stack = [];
  let position = 0;
  while (position < string_.length) {
    OPEN_REGEX.lastIndex = position;
    CLOSE_REGEX.lastIndex = position;
    const openMatch = OPEN_REGEX.exec(string_);
    const closeMatch = CLOSE_REGEX.exec(string_);
    if (!openMatch && !closeMatch) {
      break;
    }
    const nextOpenIndex = openMatch ? openMatch.index : Number.POSITIVE_INFINITY;
    const nextCloseIndex = closeMatch ? closeMatch.index : Number.POSITIVE_INFINITY;
    if (nextOpenIndex < nextCloseIndex && openMatch) {
      const openText = openMatch[0];
      const openStart = openMatch.index;
      const openEnd = OPEN_REGEX.lastIndex;
      const isComment = openText.startsWith("<!--");
      const bubble = openText.endsWith("-->");
      stack.push({
        open: openText,
        start: openStart,
        end: openEnd,
        isComment,
        bubble
      });
      position = openEnd;
      continue;
    }
    if (closeMatch) {
      const closeText = closeMatch[0];
      const closeEnd = CLOSE_REGEX.lastIndex;
      if (stack.length > 0) {
        const openState = stack.at(-1);
        const closeHasDashes = Boolean(closeMatch[1]);
        const openRequiresDashes = openState.isComment;
        if (closeHasDashes === openRequiresDashes) {
          stack.pop();
          comments.push({
            isComment: openState.isComment,
            open: openState.open,
            close: closeText,
            bubble: openState.bubble,
            downlevel: openState.bubble || !openState.isComment ? "revealed" : "hidden",
            range: [openState.start, closeEnd]
          });
        }
      }
      position = closeEnd;
    }
  }
  return comments;
}
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