Lines Matching refs:existing
548 let existing;
567 existing = events[type];
570 if (existing === undefined) {
575 if (typeof existing === 'function') {
577 existing = events[type] =
578 prepend ? [listener, existing] : [existing, listener];
581 existing.unshift(listener);
583 existing.push(listener);
588 if (m > 0 && existing.length > m && !existing.warned) {
589 existing.warned = true;
592 `Possible EventEmitter memory leak detected. ${existing.length} ${String(type)} listeners ` +
594 { name: 'MaxListenersExceededWarning', emitter: target, type: type, count: existing.length });