1 function createCounter() {
2 let counter = 0;
3
4 return function() {
5 counter += 1;
6 return counter;
7 }
8 }
9
10 var counter = createCounter();
11
12 console.log("counter1: " + counter());
13 console.log("counter1: " + counter());
14
15 const counter2 = createCounter();
16 console.log("counter2: " + counter2());t0: before line 1
t1: after line 1
t2: line 10
{
counter: [Function#2#anon],
createCounter: [Function#1#createCounter],
CCFS: { // createCounterFunctionScope
counter: 0,
anon: [Function#2#anon]
}
}t3: after line 12
{
counter: [Function#2#anon],
createCounter: [Function#1#createCounter],
CCFS: { // createCounterFunctionScope
counter: 1,
anon: [Function#2#anon]
AFS: { // anonymousFunctionScope
}
}
}t4: after line 13
{
counter: [Function#2#anon],
createCounter: [Function#1#createCounter],
CCFS: { // createCounterFunctionScope
counter: 2,
anon: [Function#2#anon],
AFS: { // returned
},
AFS2: { // anonymousFunctionScope
}
}
}t5: after line 15
{
counter: [Function#2#anon],
createCounter: [Function#1#createCounter],
CCFS: { // createCounterFunctionScope
counter: 2,
anon: [Function#2#anon],
AFS: { // returned
},
AFS2: { // returned
}
},
CCFS2: { // createCounterFunctionScope #2!
counter: 0,
anon: [Function#3#anon]
},
counter2: [Function#3#anon]
}t6: after line 16
{
counter: [Function#2#anon],
createCounter: [Function#1#createCounter],
CCFS: { // createCounterFunctionScope
counter: 2,
anon: [Function#2#anon],
AFS: { // returned
},
AFS2: { // returned
}
},
CCFS2: { // createCounterFunctionScope #2!
counter: 1,
anon: [Function#3#anon],
AFS: { // anonymousFunctionScope
},
},
counter2: [Function#3#anon]
}