function noop() {
}
function run(fn) {
  return fn();
}
function blank_object() {
  return /* @__PURE__ */ Object.create(null);
}
function run_all(fns) {
  fns.forEach(run);
}
function safe_not_equal(a, b) {
  return a != a ? b == b : a !== b || a && typeof a === "object" || typeof a === "function";
}
function subscribe(store, ...callbacks) {
  if (store == null) {
    for (const callback of callbacks) {
      callback(void 0);
    }
    return noop;
  }
  const unsub = store.subscribe(...callbacks);
  return unsub.unsubscribe ? () => unsub.unsubscribe() : unsub;
}
function null_to_empty(value) {
  return value == null ? "" : value;
}
let current_component;
function set_current_component(component) {
  current_component = component;
}
function get_current_component() {
  if (!current_component)
    throw new Error("Function called outside component initialization");
  return current_component;
}
function setContext(key, context) {
  get_current_component().$$.context.set(key, context);
  return context;
}
function getContext(key) {
  return get_current_component().$$.context.get(key);
}
function ensure_array_like(array_like_or_iterator) {
  return array_like_or_iterator?.length !== void 0 ? array_like_or_iterator : Array.from(array_like_or_iterator);
}
const ATTR_REGEX = /[&"]/g;
const CONTENT_REGEX = /[&<]/g;
function escape(value, is_attr = false) {
  const str = String(value);
  const pattern = is_attr ? ATTR_REGEX : CONTENT_REGEX;
  pattern.lastIndex = 0;
  let escaped = "";
  let last = 0;
  while (pattern.test(str)) {
    const i = pattern.lastIndex - 1;
    const ch = str[i];
    escaped += str.substring(last, i) + (ch === "&" ? "&amp;" : ch === '"' ? "&quot;" : "&lt;");
    last = i + 1;
  }
  return escaped + str.substring(last);
}
function each(items, fn) {
  items = ensure_array_like(items);
  let str = "";
  for (let i = 0; i < items.length; i += 1) {
    str += fn(items[i], i);
  }
  return str;
}
const missing_component = {
  $$render: () => ""
};
function validate_component(component, name) {
  if (!component || !component.$$render) {
    if (name === "svelte:component")
      name += " this={...}";
    throw new Error(
      `<${name}> is not a valid SSR component. You may need to review your build config to ensure that dependencies are compiled, rather than imported as pre-compiled modules. Otherwise you may need to fix a <${name}>.`
    );
  }
  return component;
}
let on_destroy;
function create_ssr_component(fn) {
  function $$render(result, props, bindings, slots, context) {
    const parent_component = current_component;
    const $$ = {
      on_destroy,
      context: new Map(context || (parent_component ? parent_component.$$.context : [])),
      // these will be immediately discarded
      on_mount: [],
      before_update: [],
      after_update: [],
      callbacks: blank_object()
    };
    set_current_component({ $$ });
    const html = fn(result, props, bindings, slots);
    set_current_component(parent_component);
    return html;
  }
  return {
    render: (props = {}, { $$slots = {}, context = /* @__PURE__ */ new Map() } = {}) => {
      on_destroy = [];
      const result = { title: "", head: "", css: /* @__PURE__ */ new Set() };
      const html = $$render(result, props, {}, $$slots, context);
      run_all(on_destroy);
      return {
        html,
        css: {
          code: Array.from(result.css).map((css) => css.code).join("\n"),
          map: null
          // TODO
        },
        head: result.title + result.head
      };
    },
    $$render
  };
}
function add_attribute(name, value, boolean) {
  if (value == null || boolean && !value)
    return "";
  const assignment = boolean && value === true ? "" : `="${escape(value, true)}"`;
  return ` ${name}${assignment}`;
}

export { subscribe as a, add_attribute as b, create_ssr_component as c, each as d, escape as e, noop as f, getContext as g, safe_not_equal as h, missing_component as m, null_to_empty as n, setContext as s, validate_component as v };
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