vscode you should know

search files
ctrl+p
type ? into search bar for help for other types of search

search editor commands
ctrl+shift+p or f1 or ctrl+p >

move line or selection up/down
alt+up/down

duplicate line or selection above/below
alt+shift+up/down

peek definition
alt+f12
you can scroll and edit in the pop-up overlay

goto definition
f12

add cursor at end of line or lines of selection
ctrl+shift+i

add cursor above below
ctrl+alt+shift+up/down

ctrl+`
open and toggle terminal window

ctrl+shit+`
open a new terminal

more here

Understanding Javascript Prototype Inheritence

    MyBaseObj = function(a) {
        this.a = a
    }
    MyObjBase.prototype.aSquared = function() {
        return a ^ 2
    }
    MyObj1 = function(a, b) {
        MyBaseObj.call(this, a)
        this.b = b
    }
    MyObj1.prototype = Object.create(MyBaseObj.prototype)
    MyObj1.prototype.constructor = MyObj1
    MyObj2 = function(a, c) {
        MyBaseObj.call(this, a)
        this.c = c
    }
    MyObj2.prototype = Object.create(MyBaseObj.prototype)
    MyObj2.prototype.constructor = MyObj2