Writing api in javascript 17%5

We then take this array and for each element create a similar object to add to our tasks observable array. Next, we'll look at how to generate documentation and client libraries. The changes to edit an existing tasks are a bit more complex, but are largely similar.

Knockout provides binding constructs that can connect to attributes of an element instead of its text. Which one you use depends on what the types m and s are in your resource. The promise object represents that unknown response.

That's it for creating a custom module that defines a class. Consider the following examples, the first two of which illustrate using Underscore to work with Arrays, and the last of which illustrates working with strings: These activities are key to building experience and credibility with a portfolio.

Your own JavaScript code exposes interfaces for others, just as the libraries referenced in this article do. The last statement in the example calls ko.

The function takes three arguments, the URI to connect to, the HTTP method to use and optionally the data to send in the body of the request.

When the user accepts the dialog box method login will be called, with the entered credentials. We can now combine these two into an API like this: We don't want the browser to show its login dialog since we have our own, so we trick the browser by having the server send error instead of If you have any questions or suggestions you are welcome to write below in the comments area.

The New Flask Mega-Tutorial

At the bottom of TasksViewModel we had the code that issued the request to get the task list. It also ensures that the code I write to interact with Modernizr has the same visual weight each time I write or read it.

This is done with a POST to the root of the resource. There are other measures to take if we were to deploy this application on a real server, at the very least the Flask development web server should be replaced with a more robust server.

Applying the four principles from this article, as well as others you discover on your own, can result in awesome APIs that delight your users and help them build amazing experiences for others.

For example, if I wanted to create a TreeView control from an unordered list, I need only call the following: The correct way to access and modify and observable is to invoke it as a function: As such, it should be designed with the same level of care and attention to detail that we provide to user interfaces.

We need a ViewModel for our dialog box: Small subobjects of an identified resource. You need to do the activities outlined in each section, especially those topics that involve working with content from an open-source project.

We then query and return a list of posts. For example, the In progress and Done labels get their visible attribute bound to the done field of the task, so that only the label that reflects the current state of each task is visible while the other one is hidden. You can use the generation code to produce static documentation files and serve those, but there is another option.

It has a larger API surface than a library like Moment. With the above changes our page is depending on a few things that don't exist yet: The problem with error code is that browsers display their own login dialog box when they receive this error, even if the error came from an ajax request.

Results from Seat Geek are logged to the browser's console after clicking the map. This is the recommended pattern to follow. For this we will use some constructs provided by Knockout: Applying the four principles from this article, as well as others you discover on your own, can result in awesome APIs that delight your users and help them build amazing experiences for others.

Knockout provides binding constructs that can connect to attributes of an element instead of its text. It also has one event handler that connects to the Add Task button. I recommend that you see the deployment chapters of my Flask Mega-Tutorial to learn about this topic.

It has a module for each resource in the API, as well as a cabal file exposing these modules and depending on a few needed libraries.

Flask Web Development, 2nd Edition

In JavaScript, API Design is Especially Important. While API design is important regardless of programming language or framework, the stakes of API design are much higher for JavaScript than for many other languages. To begin with, as a dynamic, late-bound programing language, JavaScript has no compiler to serve as a safety net or first unit test to point out mistakes in your code.

At some point or another, you will find yourself writing JavaScript code that exceeds the couple of lines from a jQuery plugin. Your code will do a whole lot of things; it will (ideally) be used by many people who will approach your code differently. They have different needs, knowledge and expectations.

This approach has the benefit of being independent of the actual view/HTML representation of you page, and therefore more resilient to changes.

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If you write an API directly against your HTML, any time you change your page around (even if the content/data remains the same), you will run the risk of breaking the API. It will cover defining the API, running it in a web framework, generating documentation, and generating and running API client libraries.

The running example we'll use is an API for a blog. This means our objects will be things like posts, users and comments. At some point or another, you will find yourself writing JavaScript code that exceeds the couple of lines from a jQuery plugin. Your code will do a whole lot of things; it will (ideally) be used by many people who will approach your code differently.

They have different needs, knowledge and expectations. In this course on writing documentation for REST APIs, instead of just talking about abstract concepts, I contextualize REST APIs with a direct, hands-on approach.

Documenting APIs: A guide for technical writers. so it works well in code samples for this introduction to REST API documentation. JavaScript allows you to test out code .

Writing api in javascript 17%5
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