JavaScript对象属性访问的两种方式

Posted 2020-09-21 sharestone

javascript对象属性访问的两种方式

object.attribute

object["attribute"]

例如：

var employees = [
{ "firstName":"Bill" , "lastName":"Gates" },
{ "firstName":"George" , "lastName":"Bush" },
{ "firstName":"Thomas" , "lastName": "Carter" }
];
alert(employees[0].lastName);
alert(employees[0]["lastName"]);

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1. var employees = [  
2. { "firstName":"Bill" , "lastName":"Gates" },  
3. { "firstName":"George" , "lastName":"Bush" },  
4. { "firstName":"Thomas" , "lastName": "Carter" }  
5. ];  
6. alert(employees[0].lastName); // 方式一  
7. alert(employees[0]["lastName"]); // 方式二