Function detectCycles

lib/internal/util/comparisons.js:1045–1052

(val1, val2, mode)

// Only handle cycles when they are detected.
// eslint-disable-next-line func-style
let detectCycles = function(val1, val2, mode) {
  try {
    return innerDeepEqual(val1, val2, mode, null);
  } catch {
    detectCycles = innerDeepEqual;
    return innerDeepEqual(val1, val2, mode, undefined);
  }
};

module.exports = {
  isDeepEqual(val1, val2) {