Function stringifyToJSON

wrappers/vue3/src/helpers.ts:151–182

(val)

  let nextIdentityId = 0;

  const stringifyToJSON = (val) => {
    const seen = new WeakSet();

    return JSON.stringify(val, (key, value) => {
      if (typeof value === 'object' && value !== null) {
        if (seen.has(value)) {
          return undefined;
        }

        seen.add(value);

        // DOM nodes carry framework metadata as enumerable own properties
        // (e.g., Vue 3 attaches `_vnode` to the mount root). Recursing into them
        // can reach getters that throw - see GH #11220 - and produces noise that
        // is irrelevant to settings equality. Replace each Node with an identity
        // token so reference equality is still detected.
        if (typeof Node !== 'undefined' && value instanceof Node) {
          let id = identityMap.get(value);

          if (id === undefined) {
            nextIdentityId += 1;
            id = `__hot_node_${nextIdentityId}__`;
            identityMap.set(value, id);
          }

          return id;
        }
      }

      return value;
    });
  };

  if (typeof objectA === 'function' && typeof objectB === 'function') {
    return objectA.toString() === objectB.toString();