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A tool for visualizing Execution Context, Hoisting, Closures, and Scopes in JavaScript.

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``` var results = []; function makeCounterObj(start) { var counter = start; return { getNext: function() { return counter++;} }; } var counter1 = makeCounterObj(1); var counter10 = makeCounterObj(10); results.push(counter1.getNext());...

``` function foo(){ function bar(){ return true; } return bar(); } foo(); foo(); foo(); ``` When the above is run, each new invocation of foo is displayed as existing _within_...

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