JS comments generate bugs. Even if comments are made, the _ javascript skills will be executed.

When I wrote js, a bug always prompted me that one of the attributes in the JAVA class was missing, but I did not know it after I commented out it, in JS, even if the annotation is executed, a strange BUG is encountered during JS writing today. I am always prompted that one of the attributes in my JAVA class does not exist. I have removed the attribute. But I have blocked the attribute in JS!

The Code is as follows:

// Var pro = "$ {product. proGrade }";

This is the proGrade. It's strange. It was later known. JS will execute even if it is annotated. It is not displayed to you.