[英]Undefined global variable in jQuery
我是jQuery的新手。 我正在嘗試創建一個全局變量,以便可以在頁面之間傳遞它。 但是,當我“警告”文檔中的變量時,它是未定義的。
這是我創建全局變量(modalHandler.js)的腳本:
var remainingCal;
$(document).ready(function() {
$(document).on("click", "#modal-btn", function() {
$(".nav > li").first().next().remove();
//get form inputs and calc remaining calories
var gender = $("#gender").val();
var age = getAge();
var height = getHeight();
var weight = getWeight();
var goal = $("#loss-goal").val();
var activity = $("#activity").val();
remainingCal = calcDailyReq(gender, age, height, weight, activity, goal);
jQuery('<li/>', {
id: 'dashboard',
}).appendTo(".nav").append("<a href='dashboard.html'>Dashboard</a>");
var url = "dashboard.html"
window.location.replace(url);
});
});
function getAge() {
ageCode = $("#age").val();
var minAge = 18;
var age = parseInt(ageCode) + minAge;
return age;
}
function getHeight() {
var heightCode = $("#height").val();
var minHeight = 54;
var height = parseInt(heightCode) + minHeight;
return height;
}
function getWeight() {
var weightCode = $("#weight").val();
var minWeight = 100;
var weight = parseInt(weightCode) + minWeight;
return weight;
}
//Calculates daily calories using BMR, Harris Benedict Equation, and weight loss goal input
function calcDailyReq(gender, age, height, weight, activity, goal) {
var bmr;
var dailyReq;
var poundOfFat = 3500;
if (gender == "male") {
bmr = 66 + (6.23 * weight) + (12.7 * height) - (6.8 * age);
} else {
bmr = 665 + (4.35 * weight) + (4.7 * height) - (4.7 * age);
}
if (activity == "0") {
dailyReq = bmr * 1.2
} else if (activity == "1") {
dailyReq = bmr * 1.375;
} else if (activity == "2") {
dailyReq = bmr * 1.55;
} else if (activity == "3") {
dailyReq = bmr * 1.725;
} else {
dailyReq = bmr * 1.9;
}
var weeklyTarget = dailyReq - (poundOfFat * parseFloat(goal))/7;
return Math.round(weeklyTarget);
}
以下是我嘗試訪問全局剩余的Cal變量的頁面上的html:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Online Calorie Tracker and Analyzer</title>
<link rel="stylesheet" type="text/css" href="css/bootstrap.css">
<link rel="stylesheet" type="text/css" href="css/dashboard.css">
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script src="js/bootstrap.js"></script>
<script src="js/modalHandler.js"></script>
<script src="js/dashboard.js"></script>
</head>
<body>
<div class="container">
<h1>Calorie Tracker and Analyzer</h1>
<div class="navbar">
<div class="navbar-inner">
<div class="container">
<ul class="nav">
<li><a href="index.html">Home</a></li>
<li class="active"><a href="dashboard.html">Dashboard</a></li>
</ul>
</div>
</div>
</div>
<div class="hero-unit">
<h3 id="track-head">Track What You Eat</h3>
</div>
</body>
<html>
dashboard.js僅僅包含:
alert(remainingCal);
在頁面中產生未定義的。 任何幫助表示贊賞!
您remainingCal
設置為$(document).ready(
函數內分配的點擊處理程序內的值。
當DOM准備就緒時, $(document).ready(
函數已運行。但是,您仍然需要單擊#modal-btn
來運行將值分配給remainingCal
#modal-btn
的函數。
歡迎使用異步JavaScript! :-D
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.