Questions tagged [knockout.js]
KnockoutJS is a JavaScript library used for data and event binding on web pages, using a MVVM pattern.
34 questions
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Monitoring a view model for changes to display a save button
I'm working with Knockout3 in a Chromium 40 environment (ES5).
I have a series of preset difficulty options, and a player has an option to switch to custom difficulty and tweak the options. When they ...
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4
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1
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52
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Performing asynchronous fetch-es that rely on each's response
Code Review : Could promises be 'chained'?
I am developing a simple Quote tool for the business-owner to fill in a form (item number, item name, price, etc) and send to the potential customer.
This ...
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4
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0
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625
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Client-side routing using Knockout and HTML5 History API for a single-page web application
The full question is... "Please, how can this code base or project (for client-side routing using Knockout and HTML5 History API) be further enhanced as regards security, production-readiness, ES6, ...
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146
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2
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393
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Dungeons and Dragons Initiative Tracker
I just started learning JavaScript (and the Knockout framework), and decided to try and make an initiative tracker for Dungeons and Dragons 5th Edition. It is designed to take an arbitrary number of ...
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1
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1
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55
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Simplify 2 filters on the same array
I have an array of number objects, which can be selected only if the orderable quantity is greater than 0.
I have a select all checkbox that is checked or unchecked accordingly with this function:
<...
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2
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1
answer
85
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Optimize KnockoutJs Pagination Computed Function
I have written a function that builds an array of paging options for rendering on the view.
I have modelled it after DataTables for jQuery, a live example with lots of data is available here: http://...
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1
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1
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1k
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Knockout computed observables in ES6
I am trying out for the first time knockoutjs and babeljs and have a question on how to do computed observables properly. Both fullName and ...
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0
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1
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1k
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Adding 1 to Date while binding using KnockoutJS
I am using KnockoutJS to bind some values. I have a date value TimeByDay that I bind like this:
...
4
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1
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371
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Simple Tic-Tac-Toe App Using Knockout.JS
This is really the first full app I've written in JavaScript minus CSS styling which I plan on adding later.
Are there any ways it can be improved? Any ways I can make it cleaner or easier to read?
...
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1
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1
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112
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Customer ViewModel with optional JSON initialization parameter
I have a situation where I have a ViewModel:
...
- 277
0
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1
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1k
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Display relevant contents if radio button is clicked using knockout.js
I have four radio buttons and I want to display relevant contents for each of them if they are clicked. I am using knockout.js for data binding.
Is there a better way to write the if statement block?...
- 121
4
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1
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130
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UI for adding roles and modules to a user list
I have a small UI that involves adding roles and modules to a user database array. The interface works as is, no problem at all, but it seems to have a bit of 'duplicate' code that I was hoping I ...
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2
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0
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785
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Assigning JSON object values to objects in a KnockoutJS setup
I am using this for in loop to loop through a JSON object and to assign the JSON object's value to my own object in a KnockoutJS setup.
The JSON object looks like ...
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12
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1
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1k
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Simon Says in Javascript (with Knockout) - Playable Code Snippet
I resolved to do the whole thing with just vanilla Javascript as a challenge, but man, Knockout's binding and state management is just too easy.
A tiny bit of callback hell to get all the flashing / ...
- 820
2
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1
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389
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Intersect knockoutjs observablearray using linqjs
I wrote a extender function to observableArray in knockout js. What I'm looking for is a way to extract the intersection records based on one property. This works well on smaller number of arrays, but ...
- 173
18
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2
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2k
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Custom JavaScript validation using the factory / module patterns
I am in the process of diving a bit deeper into JavaScript development and am looking at some common language patterns (module, and factory in particular). In this code, my aim is to create a re-...
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5
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2
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334
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Select grand child in array knockout
I'm trying to select a grand child from an array in an array.
If it was C# I would have wrote something like below
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- 173
1
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1
answer
595
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Dealing with the need to pass the root view model down to the children
I tend to feel the need in my Knockout applications to pass along a reference of the root view model down to the sub view models. However, I don't like the fact that I then have a dependency that lies ...
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2
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1
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634
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2
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0
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144
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Correct usage of an MVC pattern in web applictaion
I have a method in my controller (GetAllPatients/EnrollmentQueue) which does return the correct data (an array of ...
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4
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3
answers
187
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Planning Poker Using Knockout
I am trying to build something similar to planning poker and am very new to Knockout and was wondering if anyone could help me improve on my very crude start?
This is what I have so far:
HTML
...
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2
votes
1
answer
224
views
Is this a correct knockout ViewModel setup?
This is my first time using knockout. I'm reading/writing a JSON file with a fair bit of nested data. I had no problem creating the ViewModel to just write to the file, but now that I'm reading the ...
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5
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1
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2k
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Prototype inheritance with Knockout observables
I'm trying to write a JavaScript library to allow inheritance with knockout.
The fundamental problem when implementing inheritance in Knockout is that each Knockout observable is its own instance, ...
- 151
3
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1
answer
4k
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Revert knockout model original state back on update cancel?
I am using knockout in my project. I have some models like EmployeeModel, ServiceModel etc which user can update. On UI I give ...
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20
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3
answers
13k
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Simple to-do list as a single page application
I've been doing a simple implementation of a to-do list to learn how to use Knockout.js. I would like a general review of what I've done so far (not much). It's my first application in JavaScript and ...
- 6,711
4
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1
answer
2k
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Knockout custom binding
I've written a custom binding for KnockoutJS which renders <select> elements with <optgroup> children.
When run, ...
- 141
5
votes
1
answer
1k
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knockout binding handler for custom components
I am using a combination of knockoutJS and jQuery. I have a number of jQuery plugins which perform particular re-usable functions, such as a numeric spinbox.
I have written a binding handler to ...
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11
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2
answers
4k
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Knockout.js binding 2D table with rowspan
The app I'm working on should allows it's users to create tables. I have a view in which users are able to create a table. They should be able to define here the table's columns. The columns that the ...
- 213
2
votes
1
answer
156
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Structuring objects for proper MVVM in Knockout
I'm working with knockout and am trying to stay true the MVVM structure and trying to make the objects have that dependency on each other.
Model, ViewModel, Service definitions:
...
- 223
2
votes
1
answer
88
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Need suggestions to improve the code for an open source web based drafting application
My application. The repository and the file that needs review.
Here is the source code
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5
votes
1
answer
7k
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Two Knockout computed dependent on each other
I have 3 fields:
Net Price (ex. tax)
tax amount
Total price (price ex. vat + tax amount)
The NetPrice and the Total are ...
- 337
5
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2
answers
1k
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How to enhance the readability of JavaScript part?
There is no doubt that Knockout.js is a very useful tool, which will save you from a lot of JavaScript (jQuery) binding hassle, which will reduce your team's bug ratio concerning this part.
But ...
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1
vote
1
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401
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Book catalog demo using Knockout, jQuery, and JSON
I know this is a lot of code, but I'm not looking for any kind of detailed review of the code. I'm just hoping some nice Javascript guru can give it a once over and offer any needed advice for using ...
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