JSFiddle - React, Tailwind, and code Playground

HTML

<input id="checkbox" name="claimcheckbox" type="checkbox" data-bind="checked: IsclaimcheckboxSubscribe" />
<input id="checkbox1" name="claimcheckbox1" type="checkbox" data-bind="checked: IsclaimcheckboxSubscribe1" />

JavaScript

var model = (function (){
    var self = {};
    self.IsclaimcheckboxSubscribe = ko.observable();    
    self.IsclaimcheckboxSubscribe1 = ko.observable();   
    self.IsclaimcheckboxSubscribe.subscribe(function (newvalue) {
        if (!newvalue){
            self.IsclaimcheckboxSubscribe1(false);
        }
        //alert(newvalue);
        //claimcheckboxSelection(newvalue);
    });
    
    self.IsclaimcheckboxSubscribe1.subscribe(function (newvalue) {
        if (newvalue){
            self.IsclaimcheckboxSubscribe(true);
        }
        else{
        //self.IsclaimcheckboxSubscribe(false);
        }
        
    });
    return self;
})();



ko.applyBindings(model);