大约有 40,000 项符合查询结果（耗时：0.0305秒） [XML]
Chrome desktop notification example [closed]
...ddEventListener('DOMContentLoaded', function() {
if (!Notification) {
alert('Desktop notifications not available in your browser. Try Chromium.');
return;
}
if (Notification.permission !== 'granted')
Notification.requestPermission();
});
function notifyMe() {
if (Notificatio...
MQTT物联网协议完全实践指南 · App Inventor 2 中文网
...l STATUS_TOPICS = [
"greenhouse/status/system",
"greenhouse/status/alerts",
"greenhouse/status/device_status"
]
}
2. 连接管理与重连机制
// 智能连接管理
when Screen1.Initialize() {
MaxRetryCount = 5
CurrentRetry = 0
ReconnectInterval = 3000...
How to manage client-side JavaScript dependencies? [closed]
...ot find any that satisfies all my needs to have a coherent client side JavaScript dependency management workflow. I want to satisfy these 5 requirements:
...
iOS: Use a boolean in NSUserDefaults
...n the other hand, you could just check for login credentials and pop up an alert if they're missing. This eliminates the need to keep your boolean value synchronized with the login credentials. If you later provide a "delete login credentials" capability, you won't have to remember to set the boolea...
Get the current script file name
If I have PHP script, how can I get the filename from inside that script?
16 Answers
1...
How can I handle time zones in my webapp?
...location.getCurrentPosition(displayLocation);
} else {
alert("Oops, no geolocation support");
}
}
function displayLocation(position) {
var latitude = position.coords.latitude;
var longitude = position.coords.longitude;
var div = document.g...
Running unittest with typical test directory structure
...
The simplest solution for your users is to provide an executable script (runtests.py or some such) which bootstraps the necessary test environment, including, if needed, adding your root project directory to sys.path temporarily. This doesn't require users to set environment variables, som...
How many concurrent AJAX (XmlHttpRequest) requests are allowed in popular browsers?
...w);
echo json_encode($_GET);
die ();
} //else
?><head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script type="text/javascript">
var _settimer;
var _timer;
var _waiting;
$(function(){
clearTabl...
Check if an element is a child of a parent
... = $(evt.target);
if (target.parent('div#hello').length) {
alert('Your clicked element is having div#hello as parent');
}
}
Or if you want to check to see if there are any ancestors that match, then use .parents().
Example: http://jsfiddle.net/6BX9n/1/
function fun(evt) {
...
Clone Object without reference javascript [duplicate]
... A = Object.create(obj);
var B = Object.create(obj);
A.a = 30;
B.a = 40;
alert(obj.a + " " + A.a + " " + B.a); // 25 30 40
This creates a new object in A and B that inherits from obj. This means that you can add properties without affecting the original.
To support legacy implementations, you c...