如何检查我的Jquery函数是否成功完成？

Question

我正在做jquery函数来对文本段落做一些动画，我在Stackoverflow中找到了一个很好的例子，并对其进行了编辑以满足我的需求。

但是如何在最后一段动画完成后提醒某些事情？

你可以检查我的代码形式下面的链接

http://jsbin.com/araget/24/edit

(function ($) { 
    // writes the string 
    // 
    // @param jQuery $target 
    // @param String str 
    // @param Numeric cursor 
    // @param Numeric delay 
    // @param Function cb 
    // @return void 
    function typeString($target, str, cursor, delay, cb) { 
    $target.html(function (_, html) { 
     return html + str[cursor]; 
    }); 

    if (cursor < str.length - 1) { 
     setTimeout(function() { 
     typeString($target, str, cursor + 1, delay, cb); 
     }, delay); 
    } 
    else { 
     cb(); 
    } 
    } 

    // clears the string 
    // 
    // @param jQuery $target 
    // @param Numeric delay 
    // @param Function cb 
    // @return void 
    function deleteString($target, delay, cb) { 
    var length; 

    $target.html(function (_, html) { 
     length = html.length; 
     return html.substr(0, length - 300); 
    }); 

    if (length > 1) { 
     setTimeout(function() { 
     deleteString($target, delay, cb); 
     }, delay); 
    } 
    else { 
     cb(); 
    } 
    } 

    // jQuery hook 
    $.fn.extend({ 
    teletype: function (opts) { 
     var settings = $.extend({}, $.teletype.defaults, opts); 

     return $(this).each(function() { 
     (function loop($tar, idx) { 
      // type 
      typeString($tar, settings.text[idx], 0, settings.delay, function() { 
      // delete 
      setTimeout(function() { 
       deleteString($tar, settings.delay, function() { 
       loop($tar, (idx + 1) % settings.text.length); 
       }); 
      }, settings.pause); 
      }); 

     }($(this), 0)); 
     }); 
    } 
    }); 

    // plugin defaults 
    $.extend({ 
    teletype: { 
     defaults: { 
     delay: 100, 
     pause: 5000, 
     text: [] 
     } 
    } 
    }); 
}(jQuery)); 

$('#target').teletype({ 
    text: [ 
    'Hi I am ShoBingg!', 
    'A Mobile loyalty system that works on your smart phone.', 
    'My job is to collect Binggz and redeem it for you so you get awarded!', 
    'So what are Binggz?', 
    'Binggz are the points you get from your favorite local merchants whenever you shop, dine or even visit!', 
    'So you do not have to carry any more cards, I am with you all the time and work with home deliveries and wherever you go.', 
    'Happy Rewarding!' 
    ] 
}); 

$('#cursor').teletype({ 
    text: ['_', ' '], 
    delay: 0, 
    pause: 500 
}); 

Answer 1

您可以添加其他选项，你的插件，是在事件的回调，该电传即将循环。例如。如果选项被称为loopCallback，这个例子通过包含警报的功能callWhenFinished：

(function ($) { 
    // writes the string 
    // 
    // @param jQuery $target 
    // @param String str 
    // @param Numeric cursor 
    // @param Numeric delay 
    // @param Function cb 
    // @return void 
    function typeString($target, str, cursor, delay, cb) { 
    $target.html(function (_, html) { 
     return html + str[cursor]; 
    }); 

    if (cursor < str.length - 1) { 
     setTimeout(function() { 
     typeString($target, str, cursor + 1, delay, cb); 
     }, delay); 
    } 
    else { 
     cb(); 
    } 
    } 

    // clears the string 
    // 
    // @param jQuery $target 
    // @param Numeric delay 
    // @param Function cb 
    // @return void 
    function deleteString($target, delay, cb) { 
    var length; 

    $target.html(function (_, html) { 
     length = html.length; 
     return html.substr(0, length - 300); 
    }); 

    if (length > 1) { 
     setTimeout(function() { 
     deleteString($target, delay, cb); 
     }, delay); 
    } 
    else { 
     cb(); 
    } 
    } 

    // jQuery hook 
    $.fn.extend({ 
    teletype: function (opts) { 
     var settings = $.extend({}, $.teletype.defaults, opts); 
     var numOfMessages = settings.text.length; 

     return $(this).each(function() { 
     (function loop($tar, idx) { 
      // type 
      typeString($tar, settings.text[idx], 0, settings.delay, function() { 
      // delete 
      if ((idx+1) % numOfMessages === 0) 
       settings.loopCallback();  
      setTimeout(function() { 
       deleteString($tar, settings.delay, function() { 
       loop($tar, (idx + 1) % settings.text.length); 
       }); 
      }, settings.pause); 
      }); 

     } ($(this), 0)); 
     }); 
    } 
    }); 

    // plugin defaults 
    $.extend({ 
    teletype: { 
     defaults: { 
     delay: 100, 
     pause: 5000, 
     text: [], 
     loopCallback: callWhenFinished 
     } 
    } 
    }); 
}(jQuery)); 

$('#target').teletype({ 
    text: [ 
    '<a href="a">Hi I am ShoBingg!</a>', 
    'Happy Rewarding!' 
    ] 
}); 

function callWhenFinished() { 
     alert("Finished. Looping..."); 
}