So what’s new? ComponentsComponents bring a new and hugely more scalable way of structuring a large application. They:
I’ve built a few apps with KO components recently (including the KO triage site, and an iOS/Android game called Blockpick (not open source)) and can confidently say this is how I’ll be structuring my KO apps from now on. See: components overview documentation and explore from there. Or if you’re in the mood to get a hot drink and settle in for a demo, see this video from NDC Oslo 2014. Custom elementsCustom elements provide many of the benefits of the emerging Web Components spec, but cleanly integrated with KO’s new components feature described above. Plus, they’re ready to use in production today – compatible all the way back to IE6! See: custom elements documentation Pure computeds
See: pure computed documentation The textInput bindingThis new binding transparently resolves numerious browser event quirks related to text entry. You might not believe how many different types of events are raised (or worse: not raised) by different browsers when a user types, cuts, pastes, drags, or autocompletes text in an Well, Dec 21, 2018 - The graphics of Pro Evolution Soccer 2010 are pretty good and the. A free download with potential restrictions compared with the full version. Sep 17, 2009 - Download PES 2010. The soccer game par excellence has been renovated. A new season is her after having seen how millions of euros have. See: MoreOf course, there are smaller bugfixes in there too. You can find the exact set of changes on GitHub. Hopefully these enhancements will prove valuable for your projects. I’ve been using most of them for a while and have certainly found them useful. Big thanks to everyone who’s participated in implementing and discussing these changes!
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New to all this? Now’s a great time to check it out. Knockout is an MVVM library for JavaScript – it makes rich dynamic web UIs easier and cleaner to build. The best place to start learning is with the interactive tutorials. What just happened?
Credits go to the many community members who contributed pull requests, bug reports, new documentation, and support during this process. These people include aaronpowell, amonat, antis, aredridel, artiomchi, barkmadley, b-dur, bmac, cburgdorf, develop-me, DomenicDenicola, doodlemoonch, dre2901, drewlesueur, ducka, gigi81, GLuKKi, hunterloftis, ifandelse, joeldart, kmalakoff, lcbarcellos, mbest, mtscout6, neonstalwart, owenssam, Quaternion, rniemeyer, RoyJacobs, schinckel, seanami, SimonBartlett, studgeek, tehsenaus, and tiberiuana – and that’s just those who made recent pull requests (apologies for not tracking everyone who contributed other things). rniemeyer wrote a lot of documentation too. Why is it called 2.0.0? Why not 1.3.0?For a long time, we were planning this next version to be called 1.3.0. However,
New featuresI’m mostly going to copy and paste the “what’s new” list from my earlier blog post about Knockout 1.3 beta, with a few further updates. Besides these things, there are all the usual bugfixes and performance improvements that you’d expect. 1. Control flow bindingsPreviously, if you wanted to display a repeating sequence of UI elements (“foreach”), or have a section of the DOM exist only if some viewmodel condition was true (“if”), you’d need to create an entire template to define that. A bit cumbersome for something so simple and commonplace! Now you can use the new control flow bindings – if, ifnot, with, and foreach – to achieve basic, declarative control flow without the need for a template. This can make your code a lot more elegant and to-the-point. Here’s an example of using “foreach” and “if”: Tip: Switch to the “result” tab to see the output The “with” binding changes the binding context to whatever object you specify. This makes it easy to compose many independent view models together – you have a host model that contains references to its children, and then use “with” to bind different sections of the page to different child models. Example: Of course, the “if”, “ifnot”, “foreach”, and “with” bindings can all be combined and nested arbitrarily. 2. Containerless control flowKnockout 2.0 Olimp ResultsWhat if you want to set up template-less control flow (as in the above example), but without having to use extra container elements just to hold the “foreach”, “if”, etc., bindings? In that case, you can use the new comment-based control flow syntax like this: The comment-based control flow syntax works with the “if”, “ifnot”, “foreach”, “with”, and “template” bindings. In a large number of cases, this means you can skip string-based templates and use the binding-based control flows instead, which can run much faster depending on what exactly you’re doing. 3. Access to parent binding contextsWhether you’re using regular nested templates, or nesting the new control flow blocks, sometimes you want to reference properties that exist at the upper levels of binding. There are four new pseudo-variables that you can use in any binding (inside or outside traditional templates):
Example: 4. Cleaner event handlingIn most cases,>Note:ko.computed is Knockout 2.0’s new name for ko.dependentObservable – it’s easier to say, type, and explain. This doesn’t affect backward compatibility, though – ko.dependentObservable still works, because it references the same function instance as ko.computed at runtime. You don’t have to change your existing code if you don’t want. Occasionally, it’s desirable to limit how fast observables and computed observables update. For example, you might be using a ko.computed to invoke Ajax requests whenever a set of observables change. Sometimes you might want to change multiple underlying observables, but only have that ko.computed re-evaluate once, after all the changes (so that it only fires one Ajax request). Effectively, you want a kind of atomic update. This is now pretty easy to do: you can apply an extender called “throttle” either to observables or to computed observables. For example: The way this works is that, when throttled, notifications and evaluations are done asynchronously, and don’t occur at all until they stop being triggered for the specified throttle timeout duration. In the case of making a computed value only update once even if there are multiple synchronous changes to its dependencies, you can use a very short timeout (for example, 1ms), and then it will re-evaluate as soon as possible after any series of synchronous changes to its dependencies. Example: Breaking changesThere are two changes that might realistically affect existing 1.2.x application code. Both are for good reasons and are important for the long-term health of the project…
… to this:
This will not affect any event handlers that don’t specifically receive and process the “event” parameter. We chose to make this change because it significantly simplifies event handling in the majority of cases. Most developers have been able to upgrade to 2.0.0 beta without changing their applications at all.
SummaryTry the updated interactive tutorials, update your existing KO applications, have a great Christmas/vacation/newyear Let's start with a thanks in advance :) Knockout 2.0OK, So I'm trying to load/map hierarchical TypeScript/KnockoutJS typed classes from matching JSON data using the knockout.mapping plugin, the hierarchy can be to the Nth degree. I know I can do the following to map/load the top level class from the JSON data. However I can't figure out is how to map/load complex, Nth degree, hierarchical JSON data to a set of TypeScript/KnockoutJS classes and build the parent/child relationship. I've read countless articals, but they all fall short when it comes to hierarchical relationships beyond simple parent/child examples, and I can find none using the knockout.mapping plugin. Here are my cut down definitions of TypeScript classes I wish to map/load. I'm a c++/c# developer, so JavaScript of this nature is very new to me. TypeScript Objects The JSON would look something like this:
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2 AnswersOK, so I'm a little further down the line now, after lots of hair pulling and numerious tests. Below is a almost working example of what I'm trying to achive, the only problem with this is it doesn't seem to map correctly, even though stepping through the code seems to suggest it is loading correctly. Only when I use it with my bindings it throws a null unreferenced binding on RootTaget.Filter.Type, which should have be populated with a value. I'm still trying to figure out why, but I will welcome suggestions as to what possible wrong. :) NOW FIXED AND WORKING semi-working typescript html binding test
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Another approach is to create a .d.ts file that defines TypeScript interfaces that describe the nested collections of observable types that are generated by the knockout mapping plugin given your C# classes. Then you get the type-checking you desire using the .d.ts file (the same way you would use a .d.ts file from the definitely typed github project to get type checking for existing javaScript libraries). I created a console app to examine my c# dll using reflection. I used a custom attribute to mark the types for which TypeScript interfaces were to be created. (I had to also create a custom attribute to mark which properties were NOT to be created as observable, since the mapping plugin only makes the leaf nodes of your nested collections as observables). This worked well for me as I was able to regenerate the .d.ts file quickly when my C# model changed. And I was able to have type-checking for all parts of my knockout ViewModel.
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