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What does the question mark and the colon (?: ternary operator) mean in objective-c?
... ternary operator is that it can be used in places that an if-else cannot. ie: Inside a condition or method parameter. [NSString stringWithFormat: @"Status: %@", (statusBool ? @"Approved" : @"Rejected")] ...which is a great use for preprocessor constants: #define statusString (statusBool ? @"Appr...
How to focus on a form input text field on page load using jQuery?
...
Set focus on the first text field:
$("input:text:visible:first").focus();
This also does the first text field, but you can change the [0] to another index:
$('input[@type="text"]')[0].focus();
Or, you can use the ID:
$("#someTextBox").focus();
...
Capture Signature using HTML5 and iPad
...had 3 votes. github.com/szimek/signature_pad
– VAdaihiep
Aug 2 '13 at 10:17
3
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Chrome: timeouts/interval suspended in background tabs?
...t looks like the timeouts have been running a lot slower. Tested in FF4 or IE9 this didn't occur.
6 Answers
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how to get the host url using javascript from the current page
...de port also. This is great mini tool to see link anatomy bl.ocks.org/abernier/3070589
– Lukas Liesis
Apr 11 '16 at 5:00
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How to check if array element exists or not in javascript?
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Unfortunately, this one doesn't work in IE 7 and below.
– darksoulsong
Oct 7 '14 at 15:21
4
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Parsing JSON from XmlHttpRequest.responseJSON
...with jsonResponse
});
Compatibility: The Fetch API is not supported by IE11 as well as Edge 12 & 13. However, there are polyfills.
New ways II: responseType
As Londeren has written in his answer, newer browsers allow you to use the responseType property to define the expected format of the...
list every font a user's browser can display
...s there a way in javascript to obtain the names of all fonts (or font-families) that the browser can show? (I want to give the user a dropdown with a list of all available fonts, and allow the user to choose a font.)
I'd prefer not to have to hardcode this list ahead of time or send it down from th...
Get the string representation of a DOM node
...ch. So simple... Just a little note: If I want the whole document "stringified", I can use the same method with document.documentElement (usecase: AJAX requests). Perhaps you could incorporate that in the answer?
– Boldewyn
Nov 17 '09 at 18:36
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Intercept page exit event
...
Similar to Ghommey's answer, but this also supports old versions of IE and Firefox.
window.onbeforeunload = function (e) {
var message = "Your confirmation message goes here.",
e = e || window.event;
// For IE and Firefox
if (e) {
e.returnValue = message;
}
// For Safari
r...