answered 4-stretch-explore 2 object.md

Author: leerogerfn

Sprint-2/4-stretch-explore/objects.md

@@ -5,12 +5,98 @@ In this activity, we'll explore some additional concepts that you'll encounter i
 Open the Chrome devtools Console, type in `console.log` and then hit enter
 
 What output do you get?
+A: ƒ log() { [native code] }
 
 Now enter just `console` in the Console, what output do you get back?
+A: console {debug: ƒ, error: ƒ, info: ƒ, log: ƒ, warn: ƒ, …}
 
 Try also entering `typeof console`
+A: 'object'
 
 Answer the following questions:
 
 What does `console` store?
+A： console {debug: ƒ, error: ƒ, info: ƒ, log: ƒ, warn: ƒ, …}
+assert
+: 
+ƒ assert()
+clear
+: 
+ƒ clear()
+context
+: 
+ƒ context()
+count
+: 
+ƒ count()
+countReset
+: 
+ƒ countReset()
+createTask
+: 
+ƒ createTask()
+debug
+: 
+ƒ debug()
+dir
+: 
+ƒ dir()
+dirxml
+: 
+ƒ dirxml()
+error
+: 
+ƒ error()
+group
+: 
+ƒ group()
+groupCollapsed
+: 
+ƒ groupCollapsed()
+groupEnd
+: 
+ƒ groupEnd()
+info
+: 
+ƒ info()
+log
+: 
+ƒ log()
+memory
+: 
+MemoryInfo {totalJSHeapSize: 12700000, usedJSHeapSize: 11200000, jsHeapSizeLimit: 3760000000}
+profile
+: 
+ƒ profile()
+profileEnd
+: 
+ƒ profileEnd()
+table
+: 
+ƒ table()
+time
+: 
+ƒ time()
+timeEnd
+: 
+ƒ timeEnd()
+timeLog
+: 
+ƒ timeLog()
+timeStamp
+: 
+ƒ timeStamp()
+trace
+: 
+ƒ trace()
+warn
+: 
+ƒ warn()
+Symbol(Symbol.toStringTag)
+: 
+"console"
+[[Prototype]]
+: 
+Object
 What does the syntax `console.log` or `console.assert` mean? In particular, what does the `.` mean?
+A：log and assert are the functions under object "console". '.' mean calling for function.