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Detecting touch screen devices with Javascript
In Javascript/jQuery, how can I detect if the client device has a mouse?
16 Answers
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What's the effect of adding 'return false' to a click event listener?
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I don't believe there is a W3C specification for this. All the ancient JavaScript interfaces like this have been given the nickname "DOM 0", and are mostly unspecified. You may have some luck reading old Netscape 2 documentation.
The modern way of achieving this effect is to call event.prevent...
How to iterate over a JavaScript object?
I have an object in JavaScript:
18 Answers
18
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How do you display JavaScript datetime in 12 hour AM/PM format?
How do you display a JavaScript datetime object in the 12 hour format (AM/PM)?
25 Answers
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valueOf() vs. toString() in Javascript
In Javascript every object has a valueOf() and toString() method. I would have thought that the toString() method got invoked whenever a string conversion is called for, but apparently it is trumped by valueOf().
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Javascript swap array elements
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If you want a single expression, using native javascript,
remember that the return value from a splice operation
contains the element(s) that was removed.
var A = [1, 2, 3, 4, 5, 6, 7, 8, 9], x= 0, y= 1;
A[x] = A.splice(y, 1, A[x])[0];
alert(A); // alerts "2,1,3,4,5,6...
How to concatenate properties from multiple JavaScript objects
I am looking for the best way to "add" multiple JavaScript objects (associative arrays).
14 Answers
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Javascript replace with reference to matched group?
...two underscores with <div> and </div> respectively, using JavaScript . The output would (therefore) look like hello <div>there</div> . The string might contain multiple pairs of underscores.
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Why would a JavaScript variable start with a dollar sign? [duplicate]
I quite often see JavaScript with variables that start with a dollar sign. When/why would you choose to prefix a variable in this way?
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Why does 2 == [2] in JavaScript?
I recently discovered that 2 == [2] in JavaScript. As it turns out, this quirk has a couple of interesting consequences:
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