JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" data-bind="value: Data">

JavaScript

ko.extenders.checkValue=function (value, condition){
    if (value() > 100)
    	value(100);
    
    return value();
}

function AppViewModel(data)
{
    self=this;
    self.Data=ko.observable(data).extend({ checkValue: 100});
}

var mydata=10;
ko.applyBindings(new AppViewModel(mydata));