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Number one this week, Robot is a library to create finite state machines in a functional way.

The documentation explains clearly how state machines can help build more resilient applications, showing a very concrete example: an inline field to edit the title of a page.

Maintaining the state of your application by handling a collection of attributes and writing imperative code to toggle the attributes is error-prone because it’s hard to track all the possible combinations.

With Robot, you start by defining all the states of your application (given them a name) and the events that can trigger a transition from one state to another one.

Robot shines with a compact and elegant API and the way it handles asynchronous operations, using the invoke keyword to trigger a transition when a Promise resolves.

Integrations as “hooks” are available for popular frameworks such as React or Preact.

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1
Robot
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2
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oidc-provider
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8
webhint
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+6.0%
9
Moveable
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10
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1
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3
React
React
A declarative, efficient, and flexible JavaScript library for building user...
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4
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5
Awesome
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6
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Svelte
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8
VS Code
VS Code
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9
Angular
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+287
10
Gatsby
Gatsby
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+279

Any question or feedback? Reach us on GitHub.

Best of JavaScript is a project created by Michael Rambeau, in Osaka, Japan.