New parameters:

{ "name": "depth", "type": "integer", "optional": true, "description": "The maximum depth at which children should be retrieved, defaults to 1. Use -1 for the entire subtree or provide an integer larger than 0.", "experimental": true },

{ "name": "pierce", "type": "boolean", "optional": true, "description": "Whether or not iframes and shadow roots should be traversed when returning the subtree (default is false).", "experimental": true }

{ "name": "eventTypes", "type": "array", “items”: { “type”: “string” }, "optional": true, "description": "Only return event listeners of given types when present.", "experimental": true }
     
{ "name": "passive", "type": "boolean", "optional": true, "description": "Only return event listeners of given passive kind when specified.", "experimental": true }