Elm Counter Example

100%

Elm Counter Example

✓ Published0🌍 Public

Last edited Aug 2, 2016

Created on Jul 5, 2016

This example demonstrates a minimal interactive counter interface built with Elm. It displays a numeric value alongside two buttons, one for incrementing and one for decrementing the count. The implementation uses Elm’s `beginnerProgram` from `Html.App` to manage the application state, with `Html` and `Html.Events` for rendering and handling `onClick` events. The `update` function directly modifies the integer model based on `Increment` and `Decrement` messages. The code relies on Elm’s static typing and pure functions, with no external JavaScript libraries, illustrating Elm’s built-in reactive model and view loop.

AI-generated description

Similar vizzes

Loading thumbnail…

Fibonacci Sequence in Elm

This example presents an interactive Fibonacci sequence calculator built in Elm, starting with a simple recursive function and progressing through increasingly feature-rich versions. The code demonstrates Elm’s model-update-view architecture using `beginnerProgram`, with buttons firing `Increment` and `Decrement` messages that adjust a numeric counter. A text display shows the current model value and the corresponding Fibonacci number computed via a naive recursive definition. The visualization uses no external graphics library, instead relying on core Elm `Html` elements like `h2`, `button`, and `p` to render the interface and results.

CCliffordAnderson

76% match

Loading thumbnail…

useState

A React counter demonstrates the `useState` hook for managing numeric state, with buttons that increment and decrement a displayed number. The code uses functional updates to avoid stale closures and shows how initial state can be provided either directly or lazily via a function, logging console messages to illustrate when each initialization runs. Rendering uses `ReactDOM.render` into a root div, with the interface styled by large CSS font sizes.

RRichard Burd

68% match

Loading thumbnail…

Counter

A counter app shows a large numeric count that increases or decreases via two buttons, styled with large typography and a simple layout. It demonstrates the d3-component library for defining reusable components like `countDisplay`, `buttonPanel`, and `button`, while managing state with Redux. The top-level `app` component composes these pieces, and renders update on store subscriptions. The example bridges D3 v4's component pattern with Redux's reducer and dispatch flow.

CCurran Kelleher

67% match

Loading thumbnail…

Simple Unidirectional Data Flow

This example demonstrates a simple unidirectional data flow pattern, using a counter that increments on button click. The current count is displayed in the DOM, and each click dispatches an INCREMENT action to a reducer function, which returns a new state object. The updated state is then passed to a render function that updates the text content of the counter element. The code uses vanilla JavaScript, with plain DOM methods like `getElementById` and `addEventListener` to handle interaction and rendering.

MMark D. Clements

66% match

Loading thumbnail…

On click increment[count and setcount]

This example demonstrates a simple counter interface with a button and a display. Clicking the button increments a numeric count value shown in a large paragraph element, with the current total displayed in the text "click the button {count}". The implementation uses React's `useState` hook to manage the count state and `setcount` to update it, while the `onClick` event handler triggers the increment function. The interface is rendered via ReactDOM's `render` method into a root div, with styling applied through embedded CSS that enlarges the text and button for visual emphasis.

NNita

63% match

Loading thumbnail…

Scoring Test

This example shows a simple interactive counter where a button click increments a numeric display. It demonstrates how to build a reactive UI using D3's selection and data join methods, with the `setState` function managing state updates. The code uses D3 v7, specifically `select`, `selectAll`, `join`, and `.on` event listeners, while styling the button and counter with flexbox in CSS. The counter text updates dynamically to reflect the current count, and the example highlights D3's role in handling both DOM manipulation and state-driven rendering.

CCurran Kelleher

63% match

Loading thumbnail…

Common UI Elements with D3

This example demonstrates how to build a simple interactive counter using standard UI elements with D3. It shows a button and a text display that updates the click count in real time. The implementation uses D3 selections to create the button and counter div, with event handling via the `on` method to update application state. The `state` object manages the count, and `setState` triggers re-rendering. The code leverages D3's data join pattern with `selectAll` and `join` to bind elements. Styling is handled through CSS classes defined in `styles.css`, using Flexbox for centered layout and green button styling.

CCurran Kelleher

62% match

Loading thumbnail…

Elm HTTP Example w/ability to change input

This example demonstrates an Elm application that fetches and displays random GIFs from the Giphy API, with a text input allowing users to change the search topic. The interface shows a button to request another GIF and an image element that updates with each new result. The code uses Elm’s `Http` module with a `Json.Decode` pipeline to extract the `image_url` field from the API’s JSON response, and Bootstrap CDN styles via the `Bootstrap.CDN` and `Bootstrap.Grid` modules. The application’s architecture follows Elm’s standard Model-Update-View pattern, managing state through messages like `MorePlease` and `Change`.

CCliffordAnderson

61% match