在 onload 中调用方法时重置值

Question

window.onload = init;

function init(){
   initializeEventHandlers();
   getData(formatDate(new Date));
   gotoDate('today');
}

//scripts that manage the UI for tracker.aspx
var dCurrentDate, sCurrentDate, sCurrentDayData, stepsVal, chipsVal, dayValue, dateValue, caloriesVal;
var fCurrentValue = 0;
var bAnimating, bSliding = false;

   //scripts that manage the UI for tracker.aspx
    var dCurrentDate, sCurrentDate, sCurrentDayData, stepsVal, chipsVal, dayValue, dateValue, caloriesVal;
    var fCurrentValue = 0;
    var bAnimating, bSliding = false;

getData(d)
{
  steps = 5;
  calories = 10;
  chipsAmount = 3;
}


//I expect this to be 5+1, but it actually through an exception. I am wondering if its cause steps is not yet loaded. What can I do to make this actually 5 + 1.
steps + 1;

我从设置了一些值的 XML 加载数据。我面临的问题是，当我在 GetData 方法中设置值时。声明的变量在加载后失去了价值。我做错了什么以及如何使值保留

Answer 1

您要加载数据的变量是否在全局范围内定义？在您的 getData() 函数中，如果您将数据设置为 steps、calories 和 chipsAmount 变量，则在该函数之外将无法访问它们。您必须在函数外部定义这三个变量，以便它们在全局范围内。