Forever Functional - Chaining Calls for Fluent Interfaces

• jQuery

  166 58,931 8.5 JavaScript

  jQuery JavaScript Library

  

A well-known library that implements a fluent interface is jQuery. For example, you can write something like the following, that will access a DOM element, set some of its attributes, add CSS, and make the element visible, all in a single line.

• jest

  478 43,646 9.5 TypeScript

  Delightful JavaScript Testing.

  

You could get the same result in several lines -- but this is cleaner. Another example: the testing framework Jest applies fluent interfaces everywhere. For example, you can define a mock function that will return true once, then false, and undefined from that point on, in a single line.

• SurveyJS

  surveyjs.io featured

  Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.

  

• d3

  278 107,813 8.0 Shell

  Bring data to life with SVG, Canvas and HTML. :bar_chart::chart_with_upwards_trend::tada:

  

Let's go for a final example. The popular D3.js library also uses this style to join together several method calls.

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