JavaScript Enumerations Enum definition using Object.freeze()
Example
5.1
JavaScript does not directly support enumerators but the functionality of an enum can be mimicked.
// Prevent the enum from being changed
const TestEnum = Object.freeze({
One:1,
Two:2,
Three:3
});
// Define a variable with a value from the enum
var x = TestEnum.Two;
// Prints a value according to the variable's enum value
switch(x) {
case TestEnum.One:
console.log("111");
break;
case TestEnum.Two:
console.log("222");
}
The above enumeration definition, can also be written as follows:
var TestEnum = { One: 1, Two: 2, Three: 3 }
Object.freeze(TestEnum);
After that you can define a variable and print like before.
