Uncaught TypeError：无法读取未定义的属性'indexOf'

Question

我想让文档之外的显示功能准备就绪。如果时间等于零，它必须向我证明正确与错误。但我得到一个错误**遗漏的类型错误：无法读取的未定义的属性“的indexOf” **

$(document).ready(function() { 

    droppableId = $(this)[0].id; 
    draggableId = ui.draggable[0].id; 

    var show = function(ui, droppableId, draggableId) { 
     if (wordMap[droppableId].indexOf(draggableId) != -1) { 
      ui.draggable.removeClass("ui-state-right").addClass("ui-state-right"); 
     } else { 
      ui.draggable.removeClass("ui-state-right").addClass("ui-state-wrong"); 
     } 
    } 
}); 


var seconds = 60; 

function secondPassed() { 

    var minutes = Math.round((seconds - 30)/60), 
     remainingSeconds = seconds % 60; 

    if (remainingSeconds < 10) { 
     remainingSeconds = "0" + remainingSeconds; 
    } 

    document.getElementById('countdown').innerHTML = minutes + ":" + remainingSeconds; 

    if (seconds == 00) { 
     clearInterval(countdownTimer); 
     document.getElementById('countdown').innerHTML = "0:00"; 

     if (corrects >= 4) { 
      $("#successAlert").show(); 
      $("#startAgainGameBtn").show(); 
     } else { 
      $("#resultBtn").prop('disabled', true); 
      show(); 
      $("#getSol").show(); 
     } 

    } else { 
     seconds--; 
    } 
} 


var countdownTimer = setInterval('secondPassed()', 1000); 

Answer 1

试试这个代码，在代码中你没有传递变量到函数因此未定义错误。这样变量就可以直接在函数中使用了。然而，这是未经测试，因为没有任何HTML测试。

$(document).ready(function() { 

    var droppableId = $(this)[0].id; 
    var draggableId = ui.draggable[0].id; 

    window.show = function() { 
     if (wordMap[droppableId].indexOf(draggableId) != -1) { 
      ui.draggable.removeClass("ui-state-right").addClass("ui-state-right"); 
     } else { 
      ui.draggable.removeClass("ui-state-right").addClass("ui-state-wrong"); 
     } 
    } 
}); 


var seconds = 60; 

function secondPassed() { 

    var minutes = Math.round((seconds - 30)/60), 
    remainingSeconds = seconds % 60; 

    if (remainingSeconds < 10) { 
     remainingSeconds = "0" + remainingSeconds; 
    } 

    document.getElementById('countdown').innerHTML = minutes + ":" + remainingSeconds; 

    if (seconds == 00) { 
     clearInterval(countdownTimer); 
     document.getElementById('countdown').innerHTML = "0:00"; 

     if (corrects >= 4) { 
      $("#successAlert").show(); 
      $("#startAgainGameBtn").show(); 
     } else { 
      $("#resultBtn").prop('disabled', true); 
      window.show(); 
      $("#getSol").show(); 
     } 

    } else { 
     seconds--; 
    } 
} 


var countdownTimer = setInterval('secondPassed()', 1000);