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How to check if element has any children in Javascript?
...childElementCount property:
if ( element.childElementCount !== 0 ){
alert('i have children');
} else {
alert('no kids here');
}
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fo...
event.preventDefault() function not working in IE
...ault always works
$("mootoolsbutton").addEvent('click', function(event) {
alert(typeof(event.preventDefault));
});
// preventDefault missing in IE
<button
id="htmlbutton"
onclick="alert(typeof(event.preventDefault));">
button</button>
For all jQuery users out there you can fix ...
How to play a notification sound on websites?
...fy_sound",
volume: 0.2
},
{
name: "alert_sound",
volume: 0.3,
preload: false
}
],
volume: 0.5,
path: "sounds/",
preload: true
});
// And play sound!
ion.sound.play("my_cool_sound");
...
What is the correct JSON content type?
...(Form form, int httpStatus, String responseText)
{
MessageBox.alert("Error");
}
@Override
public void onActionComplete(Form form, int httpStatus, String responseText)
{
MessageBox.alert("Success");
}
});
In case of using application/json response type, th...
虚拟摇杆使用指导 · App Inventor 2 中文网
...车：
各案例独立使用；组合到同一屏幕时，将同名事件的处理合并到一个事件积木中。
when 虚拟摇杆1.DirectionChanged(方向) {
if 蓝牙客户端1.IsConnected {
if 方向 == "上" {
蓝牙客户端1.SendText("F")
} else if 方向 == "下" {
...
How to get the data-id attribute?
...ion>
</select>
$("#selectVehicle").change(function () {
alert($(this).find(':selected').data("year"));
});
Here is the working example: https://jsfiddle.net/ed5axgvk/1/
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...
Understand convertRect:toView:, convertRect:FromView:, convertPoint:toView: and convertPoint:fromVie
...groupingView
----addButton
During device rotation the view controller is alerted via the UIPopoverViewControllerDelegate call popoverController:willRepositionPopoverToRect:inView:
- (void)popoverController:(UIPopoverController *)popoverController willRepositionPopoverToRect:(inout CGRect *)rect i...
Object.watch() for all browsers?
...//defining a 'watcher' for an attribute
watch(ex1, "attr1", function(){
alert("attr1 changed!");
});
//when changing the attribute its watcher will be invoked
ex1.attr1 = "other value";
<script src="https://cdn.jsdelivr.net/npm/melanke-watchjs@1.5.0/src/watch.min.js"></script>
...
How can I find the length of a number?
...have to make the number to string in order to take length
var num = 123;
alert((num + "").length);
or
alert(num.toString().length);
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follo...
How to pass parameters to a view
...r in your view initialize method: initialize: function (options) { alert(options.position); }
– Cabuxa.Mapache
Feb 17 '14 at 10:53
...