Skip to content

Instantly share code, notes, and snippets.

What would you like to do?
Knockout JS Conditioned Observable
"use strict";
ko.conditionedObservable = function (initialValue, condition) {
var obi = ko.observable(initialValue);
var computer = ko.computed({
read: function () { return obi(); },
write: function (newValue) {
//unwrap value - just to be sure
var v = ko.unwrap(newValue);
//check condition
if (condition(v)) {
//set it to the observable
else {
//reset the value
return computer;

This comment has been minimized.

Copy link
Owner Author

KeesCBakker commented Sep 7, 2017

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.