Jason Spake
2020-02-07 07:33
一种方法是将UI绑定到可计算的可写对象，而不是直接将可观察对象绑定。UI更新被发送到计算对象，而计算对象则指示要更新哪些基础可观察对象而不会触发任何其他（模型）更新。
function viewModel(){
var self = this;
this._observable1 = ko.observable(10);
this._observable2 = ko.observable(20);
this.observable1 = ko.computed({
read: function(val){
return self._observable1();
},
write: function(val){
self._observable1(val);
self._observable2(val*2); //also update 2
console.log('1 updated');
}
});
this.observable2 = ko.computed({
read: function(val){
return self._observable2();
},
write: function(val){
self._observable2(val);
self._observable1(val / 2); //also update 1
console.log('2 updated');
}
});
}
ko.applyBindings(new viewModel());<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.2/knockout-min.js"></script>
1: <input type="text" data-bind="textInput: observable1"/>
<br/>
2: <input type="text" data-bind="textInput: observable2"/>热门帖子
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