JavaScript

​http://stateofjs.com​
​Reference: Node.js​
Resources
Type
MDN
Array
​MDN​
Date
​MDN​
Object
​MDN​
String
​MDN​
JSON
​MDN​
Set
​MDN​
RegExp
​MDN​
Destructuring Assignment
​MDN​
const
​MDN​
let
​MDN​
export
​MDN​
​parseInt​
​parseFloat​
​runkit.com​
strict mode
Begin files with:
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'use strict';
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​https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Strict_mode​
Arrow functions: () => {}
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const a = (param1, param2) => {
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  return param1 + param2;
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​
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}
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​
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const b = (param1, param2) => param1 + param2;
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​https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions​
String
​https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String​
UTF Support
​https://stackoverflow.com/questions/16293923/does-v8-have-unicode-support https://github.com/v8/v8/blob/master/include/v8.h​
window
window.location.hash
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console.log(window.location.hash);
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Results:
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#array
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Results will always be prefixed with #
scroll
Scroll to a part of the screen.
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window.location.hash = '#object'
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trailing commas
​http://exploringjs.com/es2016-es2017/ch_trailing-comma-parameters.html​
​
Simple Assert
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input = "a b c d e";
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​
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main(input) {
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  ...
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}
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​
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assert(expected, input) {
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  console.log(input);
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  actual = main(input);
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  result = expected === actual;
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  console.log(result);
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  if (!result) {
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    console.log(actual);
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    console.log(expected);
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  }
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}
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​
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// Case 1
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assert(expected, input);
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​
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// Case 2
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assert(expected2, input2);
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​
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// Case 3
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assert(expected3, input3);
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​querystring​
Warning:  querystring.stringify does not stringify deeply nested objects.
GitHub Gist: Merge Query Strings​
Classes
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class Animal {
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  constructor() {
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  }
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}
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​
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class Cat extends Animal {
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  constructor(props) {
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    super(props)
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  }
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}
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Flow vs TypeScript
​http://djcordhose.github.io/flow-vs-typescript/elm-flow-typescript.html#/​
Flow
​https://flow.org/en/docs/config/​
​https://github.com/facebook/relay/blob/master/.flowconfig https://github.com/facebook/react/blob/master/.flowconfig https://github.com/graphql/graphql-js/blob/master/.flowconfig​
ESLINT
Alternatives
Go
​Elixir​
Frameworks
​http://graphql.org/code/​
​https://github.com/graphql/graphql-js/​
​https://github.com/graphql/express-graphql​
​http://expressjs.com​
ORM
​http://docs.sequelizejs.com/en/v3/​
​http://bookshelfjs.org​