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
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
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? –
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 –
javascript - Get the value of checked checkbox? - Stack Overflow if you using after an event occurred you can use const selected = event target checked; true or false An example would be if you want to track selected items, here is an example using react react-hook-form react material ui, it would be better than using value from rendered field that give wrong values
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