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groeneman/ko_precedence.html

Last active December 19, 2015 12:29
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Inconsistency in Knockout's data-bind precedence
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ko_precedence.html
<!DOCTYPE html>
<html>
<head>
<script type='text/javascript' src='http://ajax.aspnetcdn.com/ajax/knockout/knockout-2.2.1.js'></script>
<script type="text/javascript">
function viewModel() {
var self=this;
this.someText = ko.observable('I am a string');
this.observableBoolean = ko.observable(false);
};
</script>
</head>
<body>
Text first, then if:<span data-bind="text:someText,if:observableBoolean"></span><br />
If first, then text:<span data-bind="if:observableBoolean,text:someText"></span><br /><br />
Text first, then visible:<span data-bind="text:someText,visible:observableBoolean"></span><br />
Visible first, then text:<span data-bind="visible:observableBoolean,text:someText"></span>
</body>
<script type="text/javascript">
ko.applyBindings(new viewModel());
</script>
</html>
@groeneman
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This is the output that results:

Text first, then if:
If first, then text:I am a string

Text first, then visible:
Visible first, then text:

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