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When should I use ?? (nullish coalescing) vs || (logical OR)? Related to Is there a quot;null coalescing quot; operator in JavaScript? - JavaScript now has a ?? operator which I see in use more frequently Previously most JavaScript code used || let userAge =
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 include a JavaScript file in another JavaScript file? I have loaded div dynamically by clicking menu without page loading by using URL hash My problem is when i click same page 2 3 times js loading 2 3 times thats why every event occurs multiple time I want to check js file already loaded into footer head before appending in that code: var js = document createElement ("script"); js type = "text javascript"; js src = jsFilePath; document body
How do I check for null values in JavaScript? - Stack Overflow Great, that seems to work Thanks for the comment on why you avoided isNaN as well, I can get behind that logic 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
How do I resolve Cannot find module error using Node. js? After pulling down a module from GitHub and following the instructions to build it, I try pulling it into an existing project using: gt; npm install faye This appears to do the trick: gt; np