更改后台Javascript项目
更改后台Javascript项目
提问于 2018-06-13 04:47:01
我正在尝试制作一个背景，可以在一天中的某个时间改变颜色。然而，我似乎无法修改我的参数。将它们放入变量中。从HTML到JavaScript的输入是固定的。
感觉我漏掉了一些很明显的东西。( JavaScript和一般编码的新手)。
jQuery(document).ready(function($) {
function alerts(alert1, alert2, alert3, alert4, alert5, alert6) {
var hours = new Data().getHours();
if (alert1.empty() || alert2.empty() || alert3.empty() || alert4.empty() || alert5.empty() || alert6.empty()) {
alert1 = 0;
alert2 = 12;
alert3 = 12;
alert4 = 17;
alert5 = 17;
alert6 = 24;
if (hours >= alert1 && hours < alert2) {
document.body.style.backgroundColor = "#fceea1";
} else if (hours >= alert3 && hours < alert4) {
document.body.style.backgroundColor = "#dbbc0a";
} else if (hours >= alert5 && hours < alert6) {
document.body.style.backgroundColor = "#706527";
} else {
}
}
};body {
font-family: sans-serif;
background: white;
font-size: 150px;
color: #333;
}<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Welkom</title>
<link rel="stylesheet" href="css/style.css">
</head>
<body>
<script src='http://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js'></script>
<script src="js/index.js">
alerts(0, 12, 12, 17, 17, 20);
</script>
</body>
</html>
回答 1
Stack Overflow用户
发布于 2018-06-13 05:04:21
我认为实验随机的小项目是一个很好的学习方法，所以我做了一个简单的脚本来做你用注释描述的事情，这样你就可以试着理解每件事是如何工作的！
颜色看起来很奇怪和丑陋，但这只是因为我给它的值，所以请随意摆弄重量和不同的时间度量！
function changeColor() {
var d = new Date(); // Creates a 'date' object
var ms = d.getMilliseconds(); // Gets the current millisecond
var minute = d.getMinutes(); // Gets the current minute
var second = d.getSeconds(); // Gets the current second
/*
Other methods of obtaining the time:
d.getFullYear() Get the year as a four digit number (yyyy)
d.getMonth() Get the month as a number (0-11)
d.getDate() Get the day as a number (1-31)
d.getHours() Get the hour (0-23)
d.getTime() Get the time (milliseconds since January 1, 1970)
d.getDay() Get the weekday as a number (0-6)
*/
document.body.style.backgroundColor = 'rgb(' + ms/4 + ',' + minute + ',' + second + ')';
// This sets the backgroundColor of the document to an RGB value where red is the milliseconds, green is the minute, and blue is the second
// Note: I divided the millisecond value by 4 because the highest possible value is 255 and the millisecond value can reach 999.
// It would still work without dividing it, but the color wouldn't change as much because it would interpret 255-999 as 255
}
var interval = setInterval(changeColor, 100) // Runs the changeColor() function every .1 seconds
// Note: This would still work if I didn't set it as a variable, but it's good practice to set intervals as variables so you can use clearInterval(variable)
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/50825612
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