jQuery 2.1.3, HTML, CSS, JavaScript
No-Library (pure JS), HTML, CSS, JavaScript
A mistake: I forgot to add the `new` operator. But `ko.applyBindings()` magically worked. That's because ... see code.
Knockout.js 2.3.0, HTML, CSS, JavaScript
If the JS object is an array, how to specify 'observe'?
Settings 'ignore', 'include', 'copy' and 'observe' all only applies to the level they point.
Does the setting `ignore` applies to multiple level? No, 'ignore' only applies to the first level.
jQuery (edge), HTML, CSS, JavaScript
.done returns the same promise, while .then returns the new promise.