Progressive code code

Question

I am trying to create a .js file for a website that, by entering the code with the keys Up, Up, Down, Down, Left, Right, Left, Right, B, A, Start (enter), will insert a video, However, when entering the correct The web page should display something like “keep moving”, if the wrong key is entered, it should display “incorrect, try again” and allow them to start working.

I was able to process JavaScript when when I enter the correct code, it displays a warning, and entering the wrong code displays a different code.

I managed to get this code using online resources, but none of them explains how to make a mistake, try again a part

if (window.addEventListener) { var keys = [], konami = "38,38,40,40,37,39,37,39,66,65,13"; window.addEventListener("keydown", function(e){ keys.push(e.keyCode); if (keys.toString().indexOf(konami) >= 0) { alert('Right'); keys = []; }; if (keys.toString().indexOf(konami) < 0) { alert('Wrong'); keys = []; } }, true); 

};

Any help would be greatly appreciated.

Answer 1

 if (window.addEventListener) { var index = 0; var konami = [38,38,40,40,37,39,37,39,66,65,13]; window.addEventListener("keydown", function(e){ if (e.keyCode === konami[index]) { index++; //valid key at the valid point if (index == konami.length) { alert("Correct"); } else { alert("Keep going"); } } else { // incorrect code restart index = 0; alert("Wrong"); } }); } 

Answer 2

You can do something like

  if (window.addEventListener) { var keys = [], konami = "38,38,40,40,37,39,37,39,66,65,13".split(','); window.addEventListener("keydown", function(e){ keys.push(e.keyCode); console.log(e.keyCode); var lengthOfKeys = keys.length -1; if (konami[lengthOfKeys] == keys[lengthOfKeys]) { alert('Right'); if(konami.length === keys.length){ alert('complete!'); } }else{ alert('Wrong'); keys = []; } }, true); }; 

fiddle here http://jsfiddle.net/b6kuZ/

Answer 3

This works for me:

 if (window.addEventListener) { var keys = [], konami = "38,38,40,40,37,39,37,39,66,65,13"; konami_arr = konami.split(','); window.addEventListener("keydown", function(e){ keys.push(e.keyCode); var position = keys.length-1; if(keys[position ] != konami_arr[position]) { alert('Wrong'); keys = []; } else if (keys.join(',') == konami) { alert('Right'); keys = []; }; }, true); } 

jsFiddle exmaple