Cons/Dislikes
    No conventions.
    Not standardized.
    No consistency in online resources.
      Lots of outdated online resources.
      The fact that AirBNB has 20 pages on how to write JavaScript is insane.
    No first class Enums
    No types. Can be handled by Flow or TypeScript
    Callback hell (work around with Promises, async and await, but its not supported everywhere)
    Inconsisent: Array.length vs Set.size
      Like wtf?
    All the problems of a loosely typed language.
      Hard to scale as a language, due to no types.
      Hard to refactor.
    Inconsistencies in coding style amongst the community
    JS Modules are confusing
    Requires high code coverage due to inconsistencies.
    Changing babel flags can make your code run differently
      Requires high code coverage to ensure it does as expected.
    You need tools like lodash for basic stuff (bucketing items in in an array, groupBy)
    Requires a lot of tooling to maintain JavaScript
    Was design for client side browsing, not server side
    It has both null and undefined
    No native sprintf
    Browser support is inconsistent.
    Requires a lot of static analysis tools.
    See Node.js's creator Ryan Dahl's "10 Things I Regret About Node.js"
What does this return?
1
"some string".match(/some regex/)
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It's an Array with properties of index and input.
Things which increase the JavaScript environments complexity:
    Requiring the use of new features via Babel
    Requiring WebPack to bundle for frontend
    Module systems
    Inconsistent environments
      Browser development, so many browser versions
      Node, webpack vs everything else

Array.flat

Array.flat only works in Node.js 11+

Array.values() is different from Object.values()

Object.values(object) returns an array of values
array.values() returns an iterator

No easy way to test that two Sets are equal

1
new Set(['a', 'b']) == new Set(['b', 'a']); // false
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Last modified 2yr ago
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