JSFiddle - React, Tailwind, and code Playground

by uedatakuya

HTML

version: 2.3

JavaScript

var n = ko.observable(10);

var evenN = ko.computed(function() {
    var isEven = n() % 2 == 0;
    alert(isEven);
    console.log(isEven);
    return isEven;
});

evenN.subscribe(function(newValue) {
    alert("change evenN to " + newValue);
    console.log("change evenN to " + newValue);
});

n(20);
n(21);