Learnt

[VeryLazyBoy]

JQuery

• function() {...$(this) => this element in JQuery wrapper}
• way to construct keyup searching (checking current input value while receiving data)
• apendTo (as a child)
• val()
• text()
• css('display', 'none')
• addClass()
• .class > a
• [id^=sth]
• nextAll(selector) (all siblings)
• find(selector) (all descendant)
• child(selector) (immediate child)
• $(dom) => jquery

Js

• var set = new Set([1, 2, 1]);
• String.format
• sublime's js beauty
• element.classList.toggle('show')
• onClick = function(this) => this is the element; function() {this} => this is the window
• sort is always alphabetical by default
• null == 0 > false
• null == "" > false
• 0 == "" > true
• querySelector needs escape "." etc, whereas getElementById doesn't need

HTML

• autoComplete = 'off' => avoid auto fill in chrome

MongoDb

• find
• aggregate
  • group
  • match
  • limit
• sort
• Bson
• NoSQLBooster