這個Javascript函數保持循環，我怎樣才能讓它運行一次？

Question

該代碼旨在以打字方式動畫某些文本。我希望它只運行一次，但它始終在句子區域循環。我將如何去阻止它循環。代碼的頂部收集輸入的值並放入數組，這一切都很好。這只是循環我有問題。

var yourWord = document.getElementById("myText").value; 

var yourtext = "I took the word " + yourWord + "..."; 


var infomation = [yourtext, 
     'I looked at the most relevant news article relating to it...', 
     'And created this piece of art from the words in the article! ' 
    ], 

    part, 

    i = 0, 
    offset = 0, 
    pollyLen = Polly.length, 
    forwards = true, 
    skip_count = 0, 
    skip_delay = 5, 
    speed = 100; 

var wordflick = function() { 
    setInterval(function() { 
     if (forwards) { 
      if (offset >= infomation[i].length) { 
       ++skip_count; 
       if (skip_count == skip_delay) { 
        forwards = false; 
        skip_count = 0; 
       } 
      } 
     } else { 
      if (offset == 0) { 
       forwards = true; 
       i++; 
       offset = 0; 
       if (i >= pollyLen) { 
        i = 0; 
       } 
      } 
     } 
     part = infomation[i].substr(0, offset); 
     if (skip_count == 0) { 
      if (forwards) { 
       offset++; 
      } else { 
       offset--; 
      } 
     } 
     $('#pollyInfo').text(part); 
    }, speed); 
}; 

$(document).ready(function() { 
    wordflick(); 
}); 

Answer 1

修改行：

setInterval(function() { 

成：

var interval = setInterval(function() { 

然後清除你在哪裏設置時i = 0的時間間隔;

if (i >= pollyLen) { 
        i = 0; 
} 

到：

if (i >= pollyLen) { 
        i = 0; 
        clearInterval(interval); 
} 

這應該做的工作！