b.name=50; //this expression "b.name=50" is evaluated as 50, that is, the right side to the equal operator. 'cuz b.name is not writable, b.name, however,  is unchanged
//if you run console.log(b.name) again, you will see "ooo", not 50.

【 在 ename (ename) 的大作中提到: 】
: function user() {
:         this.name = 20;
: };
: ...................
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FROM 183.95.135.*