Source: constructors/extensions/prototype.js, line 358 Members attrdata :object Source: constructors/extensions/prototype.js, line 361 object for storing custom variables Type: object attrdatastore :object Source: constructors/extensions/prototype.js, line 365 Type: object methods :Object.<string, function()> Source: constructors/custom-elements.js, line 104 Type: Object.<string, function()>