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When should I use ?? (nullish coalescing) vs || (logical OR)? I did see that description in that questions answer, but it's seemed like a repeat of well known JS boolean logic rather than a specific example – mikemaccana Commented Apr 28, 2020 at 13:18
What is the purpose of the dollar sign in JavaScript? A '$' in a variable means nothing special to the interpreter, much like an underscore From what I've seen, many people using jQuery (which is what your example code looks like to me) tend to prefix variables that contain a jQuery object with a $ so that they are easily identified and not mixed up with, say, integers
How to iterate (keys, values) in JavaScript? - Stack Overflow A basic doubt here I landed here looking for how to do this in node js, which is javascript on server side How do I know which ES version applies in my case Also, in case of regular javascript users, what is the proper way to support as I understand that ES version depends on the client's browser? –
Check Uncheck checkbox with JavaScript - Stack Overflow fyi: just tested this onclick="document getElementById('dmsmh_chk') checked = !document getElementById('dmsmh_chk') checked;" this behaves like a jQuery toggle in plain JS (checks the box when it is unchecked or removes the check when it is checked) –
How do I check for null values in JavaScript? - Stack Overflow There's also the Underscore js method, which seems even more confusing blackbox, but worth noting anyway because it takes advantage of NaN !== NaN Object prototype toString call(variable) === '[object Number]' variable !== +variable –
Return multiple values in JavaScript? - Stack Overflow In JS, we can easily return a tuple with an array or object, but do not forget! => JS is a callback oriented language, and there is a little secret here for "returning multiple values" that nobody has yet mentioned, try this:
JavaScript hide show element - Stack Overflow You can also use this code to show hide elements: document getElementById(id) style visibility = "hidden"; document getElementById(id) style visibility = "visible";