1. Yesterday"s interview questions
2. The code is as follows
console.log("this.name", this.name)/ / run result this.name
console.log("this.age", this.age) / / run result this.age undefined
3. 
1. Yesterday"s interview questions
2. The code is as follows
console.log("this.name", this.name)/ / run result this.name
console.log("this.age", this.age) / / run result this.age undefined
3.
two knowledge points
what's weird and what's the problem?
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