// ...
const obj = reactive({
prop1: 'prop1',
prop2: 'prop2'
})
watch(
() => obj.prop1,
(prop1, prevProp1) => {
console.log("#######");
console.log("Lets watch:");
console.group();
console.log("obj.prop1: " + prop1);
console.log("Old prop1: " + prevProp1);
console.groupEnd();
console.group();
console.log("Prop2: " + obj.prop2);
console.groupEnd();
console.log("End watch.");
console.log("#######");
}
)
//...