js中动态获取object类型的键值

例子:javascript var obj ={"name1":"张三","name2":"李四"}; var key = "name1"; var value = obj.key; //获得的是 "undefined" //静态获取 value = obj.name1; //获得的是 "张三" //动态获取 value = obj[key]; //获得的是 "张三"
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