関連ワード:  javascript cannot add property object is not extensible    typeerror cannot add property object is not extensible    javascript cannot add property 0 object is not extensible    typeerror cannot add property 0 object is not extensible    typeerror cannot add property current object is not extensible    typeerror cannot add property 1 object is not extensible    typeerror cannot add property 2 object is not extensible    typeerror cannot add property metadata object is not extensible    typeerror cannot add property stats object is not extensible    uncaught typeerror cannot add property object is not extensible  
結果 : javascript cannot add property object is not extensible