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Asynchronous vs Multithreading - Is there a difference?
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JavaScript is single-threaded and asynchronous. When you use XmlHttpRequest, for example, you provide it with a callback function that will be executed asynchronously when the response returns.
John Resig has a good explanat...
Check if a user has scrolled to the bottom
...but as per the documentation from MDN, the simplest way is by using native javascript properties:
element.scrollHeight - element.scrollTop === element.clientHeight
Returns true when you're at the bottom of any scrollable element. So simply using javascript:
element.addEventListener('scroll', fun...
What is the “right” JSON date format?
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JSON itself does not specify how dates should be represented, but JavaScript does.
You should use the format emitted by Date's toJSON method:
2012-04-23T18:25:43.511Z
Here's why:
It's human readable but also succinct
It sorts correctly
It includes fractional seconds, which can help re-...
Can comments be used in JSON?
...ed on:
https://www.json.org
RFC 4627:
The application/json Media Type for JavaScript Object Notation (JSON)
RFC 8259 The JavaScript Object Notation (JSON) Data Interchange Format (supercedes RFCs 4627, 7158, 7159)
share
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How may I reference the script tag that loaded the currently-executing script?
How can I reference the script element that loaded the javascript that is currently running?
14 Answers
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Why does typeof NaN return 'number'?
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It means Not a Number. It is not a peculiarity of javascript but common computer science principle.
From http://en.wikipedia.org/wiki/NaN:
There are three kinds of operation
which return NaN:
Operations with a NaN as at least one operand
Indeterminate forms...
OnChange event handler for radio button (INPUT type=“radio”) doesn't work as one value
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You're using JavaScript, right? So why not just maintain a variable that stores the last known selected radio button? If you're using a single handler, then you can check for this stored value before you overwrite it with the new value. ...
(![]+[])[+[]]… Explain why this works
... gives "10". This is used to extract the "i"(String indices can be used in javascript if they can be coerced to integers apparently). The final construct which produces it is: ([![]]+[][[]])[+!+[]+[+[]]]
– entropy
Dec 29 '11 at 9:44
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How can I get selector from jQuery object
...ector(el);
});
}
};
})(window.jQuery);
Minified Javascript
// http://stackoverflow.com/questions/2420970/how-can-i-get-selector-from-jquery-object/15623322#15623322
!function(e,t){var n=function(e){var n=[];for(;e&&e.tagName!==t;e=e.parentNode){if(e.className){var...
mailto link multiple body lines
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@frakman1 encodeURIComponent is a JavaScript function. You can use it without any includes.
– kiranvj
Jul 4 '17 at 5:04
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