Dev Tips

DevTools: Identify objects created with a certain JavaScript constructor

Built into the DevTools Console is the Command Line API. You can use this JavaScript snippet:

queryObjects(Constructor)

To query for and retrieve objects which were created from the constructor you specify.

For example you can try:

queryObjects(WebSocket)  /*  If the above returns an empty array...  ...try executing `new WebSocket('wss://url')` beforehand  */    // Discover all Promise objects  queryObjects(Promise)    // Also works with user-defined constructors  class Person {}  new Person()  queryObjects(Person)