如何使用對象

Question

的關鍵。如果有：

var obj = {a: 'This is a', b: 'This is b', c: 'This is c'} 
var select = 'b'; 

我怎樣才能讓工作是這樣的：

console.log(obj.select); // This would output: This is b 

Answer 1

使用bracket notation

var obj = { 
 
    a: 'This is a', 
 
    b: 'This is b', 
 
    c: 'This is c' 
 
} 
 
var select = 'b'; 
 
console.log(obj[select]);