Question

How to use closure in JavaScript

Answer 1

function test() {
  var s = 'javascript'; // s - local variable in test()
  function closure_function() { // closure_function - inner function - a closure
    console.log(s);
  }
  closure_function();
}

test();



/*
run:

javascript

*/

 

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Answer 2

function test() {
  var s = 'javascript'; // s - local variable in test()
  function closure_function() { // closure_function - inner function - a closure
    console.log(s);
  }
  return closure_function;
}

var funcRef = test();

funcRef();



/*
run:

javascript

*/

 

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