1、使用dependentObservable监控依赖属性
①使用dependentObservable定义一个方法，方法中是需要依赖的属性
myViewModel.show_all = ko.dependentObservable(function () { return myViewModel.string_label() + '~~~~' + myViewModel.string_p() + myViewModel.string_input(); }) ②完整代码<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script src="knockout/knockout-3.5.1.js"></script>
<!-- <script src="https://knockoutjs.com/downloads/knockout-3.5.1.js"></script> -->
</head>
<body>
<h3 class="text-center text-success">debug page</h3>
<label data-bind="text:string_label"></label>
<p data-bind="text:string_p"></p>
<input type="text" data-bind="value:string_input">
<p><b>注意：</b>input标签的文本需要使用textinput,其他标签用text即可</p>
<p>---------------------------------------------------------------------------------------</p>
<p>监控依赖使用</p>
<p data-bind="text:show_all"></p>
</body>
<script>
var myViewModel = {
'string_label': ko.observable('给label标签赋值文本'),
'string_p': ko.observable('给p标签赋值文本'),
'string_input': ko.observable('给input标签赋值文本'),
};
myViewModel.show_all = ko.dependentObservable(function () {
return myViewModel.string_label() + '~~~~' + myViewModel.string_p() + myViewModel.string_input();
})
ko.applyBindings(myViewModel);
</script>
</html>
③运行截图