JavaScript

Resources

strict mode

Begin files with:

'use strict';

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Strict_mode

Arrow functions: () => {}

const a = (param1, param2) => {
  return param1 + param2;

}

const b = (param1, param2) => param1 + param2;

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

console.log(window.location.hash);

Results:

#array

Results will always be prefixed with #

scroll

Scroll to a part of the screen.

window.location.hash = '#object'

trailing commas

http://exploringjs.com/es2016-es2017/ch_trailing-comma-parameters.html

Simple Assert

input = "a b c d e";

main(input) {
  ...
}

assert(expected, input) {
  console.log(input);
  actual = main(input);
  result = expected === actual;
  console.log(result);
  if (!result) {
    console.log(actual);
    console.log(expected);
  }
}

// Case 1
assert(expected, input);

// Case 2
assert(expected2, input2);

// Case 3
assert(expected3, input3);

querystring

Warning: querystring.stringify does not stringify deeply nested objects.

Classes

class Animal {
  constructor() {
  }
}

class Cat extends Animal {
  constructor(props) {
    super(props)
  }
}

Flow vs TypeScript

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

Frameworks

ORM

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