检查 JavaScript 中某个类的对象的值是否已更改，并根据该值更新另一个值?
javascriptweb developmentobject oriented programming
要检查这一点，请使用 getter 的概念，即 get 属性。以下是代码 −
示例
class Student{
constructor(studentMarks1, studentMarks2){
this.studentMarks1 = studentMarks1
this.studentMarks2 = studentMarks2
var alteredValue = this;
this.getValues = {
get studentMarks1() {
return alteredValue.studentMarks1
},
get studentMarks2() {
return alteredValue.studentMarks2
}
}
}
}
var johnSmith = new Student(78,79)
console.log("Before incrementing the result is=")
console.log("StudentMarks1="+johnSmith.studentMarks1,"StudentMarks2="+johnSmith.studentMarks2);
johnSmith.studentMarks2+=10;
console.log("After incrementing the value 10 in the studentMarks2, the result is as follows=")
console.log("StudentMarks1="+johnSmith.studentMarks1,
"StudentMarks2="+johnSmith.getValues.studentMarks2);
要运行上述程序，您需要使用以下命令 −
node fileName.js.
这里，文件名是 demo200.js。
输出
这将产生以下输出 −
PS C:\Users\Amit\javascript-code> node demo200.js Before incrementing the result is= StudentMarks1=78 StudentMarks2=79 After incrementing the value 10 in the studentMarks2, the result is as follows= StudentMarks1=78 StudentMarks2=89
