这个Javascript函数保持循环，我怎样才能让它运行一次？

Question

该代码旨在以打字方式动画某些文本。我希望它只运行一次，但它始终在句子区域循环。我将如何去阻止它循环。代码的顶部收集输入的值并放入数组，这一切都很好。这只是循环我有问题。

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() { 

然后清除你在哪里设置时i = 0的时间间隔;

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

到：

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

这应该做的工作！