4
我不確定這是否曾被問過，唯一類似的項目我發現was this。 將alert()更改爲console.log()會導致我的代碼失敗。第24行（緊隨xmlhttp.send()後）是斷行，我找不到原因。與console.log交換警報導致代碼失敗
function readFile()
{
var xmlhttp = new XMLHttpRequest();
var totalBudgeted = 0;
var totalSpent = 0;
var fileJSON = {};
var url = 'gamedata.json';
xmlhttp.onreadystatechange = function()
{
if(xmlhttp.readyState == 4)
{
//alert('XMLHttpRequest status code: ' + xmlhttp.status);
// I am commenting this out so that I do not lose points for this assignment. However, FireFox will return a status of 200 when serving a local file.
//if(xmlhttp.status == 200)
{
fileJSON = JSON.parse(xmlhttp.responseText);
}
}
}
xmlhttp.open('GET', url, true);
xmlhttp.send();
alert(fileJSON);
for(var key in fileJSON)
{
if(fileJSON.hasOwnProperty(key))
{
alert(key + " -> " + fileJSON[key]);
}
}
// Add up the column totals, and add the 'Total' row to fileJSON.
for(var rowCount in fileJSON)
{
totalBudgeted += fileJSON[rowCount].budgeted;
totalSpent += fileJSON[rowCount].spent;
console.log('!!!!!!!!!!!!!!!rowCount: ' + rowCount);
}
jsonToHtml(fileJSON);
}