You can declare static constants in the JavaScript class by declaring static getters that return constants declared outside the class.
JavaScript class constants
A simple example code declares constants outside the class and adds getters that return the constants in our class.
<!DOCTYPE html>
<html>
<body>
<script>
const const1 = 100,
const2 = 200;
class Test {
static get constant1() {
return const1;
}
static get constant2() {
return const2;
}
}
console.log(Test.constant1)
console.log(Test.constant2)
</script>
</body>
</html>
Output:
Define a const in the class constructor (ES6)
You use static read-only properties to declare constant values that are scoped to a class.
class Foo {
static get BAR() {
return 42;
}
}
console.log(Foo.BAR); // print 42.
Foo.BAR = 43; // triggers an errorDo comment if you have any doubts or suggestions on this JS class topic.
Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.
OS: Windows 10
Code: HTML 5 Version