[英]if binding in knockoutjs not working
我正在嘗試在帶有數據綁定的基因敲除js中使用if語句:
例如,如果if為false且div中的文本應隱藏:
<!-- this is what i am trying to get working. -->
<div data-bind="if: little">rank : little</div>
我的猜測是,這件作品無法按預期工作。 它應該返回false,因為clickCount在啟動時為0。
this.little = function(){
return this.clickCount() > 5;
};
我已經粘貼了app.js和index.html的代碼。
這是app.js
var ViewModel = function (){
this.clickCount = ko.observable(0);
this.name = ko.observable('Tabby');
this.imgSrc = ko.observable('img/2.jpg');
this.imgAttribution = ko.observable('http://www.flickr.com/photos/big');
this.incrementCounter = function() {
this.clickCount(this.clickCount() + 1);
};
// this is not returning false as it should.
this.little = function(){
return this.clickCount() > 5;
};
}
ko.applyBindings(new ViewModel());
這是index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Cat Clicker</title>
</head>
<body>
<div>
<h2 data-bind="text: name"></h2>
<div data-bind="text: clickCount"></div>
<!-- this is what i am trying to get working. -->
<div data-bind="if: little">rank : little</div>
<img src="" alt="cute cat" data-bind="click: incrementCounter, attr:{src: imgSrc}">
</div>
<script src="js/lib/knockout-3.2.0.js"></script>
<script src="js/app.js"></script>
</body>
</html>
嗨,您可以使用可見的淘汰賽綁定
以下代碼將為您工作:
<div data-bind="visible: !little()">rank : little</div>
OR
<div data-bind="visible: little()">rank : little</div>
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