JavaScript that I just know about

• other ECMAScripts: typeScript, coffeeScript
• like property in c sharp: get, set
• use ... to concatenate a list
• naming: iAmAMethod, iAmAVariable
• use let or const instead of var
• indent: two space instead of tab
• a line should be less then 80 columns
• apart from DOM (document), there is a BOM (browser)
• it has yield
• 1 == '1'; 1 !== '1' (=== will not cast)
• field name can be variable:
  • let x = 'C';
  • let obj = {A: a, }