API Intro

1. Intro

• Including methods or properties.

Note:
呼叫 method 時，大多還是物件式的呼叫語法，例如 str.xxx()，少數是 global 型的呼叫 (e.g. PHP 的 file_get_contents())
(即使是 console.log() 其實也是物件式呼叫)

• Global 型呼叫：
  • isNaN()
  • Number(): converts to a Number
  • String(): converts to a String (the same as x.toString())
  • Boolean(): converts to a Boolean

• All JavaScript data types have methods:
  • toString()
  • valueOf()

2. Special API

2.1. eval()

eval("var x = 2");
console.log(x);