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
window.location.hash
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);
Warning: querystring.stringify
does not stringify deeply nested objects.
GitHub Gist: Merge Query Strings
Class
es
Class
esclass 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
Go
Frameworks
ORM
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