We have 17 open source custom elements:

An input element that validates its value with a server endpoint.

[Repository](https://github.com/github/auto-check-element) | [Example](https://github.github.com/auto-check-element/examples/)

Auto-complete input values from server search results.

[Repository](https://github.com/github/auto-complete-element) | [Example](https://github.github.com/auto-complete-element/examples/)

Copy element text content or input values to the clipboard.

[Repository](https://github.com/github/clipboard-copy-element) | [Example](https://github.github.io/clipboard-copy-element/examples/)

A modal dialog that's opened with <details>.

[Repository](https://github.com/github/details-dialog-element) | [Example](https://github.github.io/details-dialog-element/example/index.html)

A menu opened with <details>.

[Repository](https://github.com/github/details-menu-element) | [Example](https://github.github.io/details-menu-element/examples)

Attach files via drag and drop or file input.

[Repository](https://github.com/github/file-attachment-element) | [Example](https://github.github.com/file-attachment-element/examples/)

Display elements in a subtree that match filter input text.

[Repository](https://github.com/github/filter-input-element) | [Example](https://github.github.io/filter-input-element/examples/)

Backports native emoji characters to browsers that don't support them by replacing the characters with fallback images.

[Repository](https://github.com/github/g-emoji-element) | [Example](https://github.github.io/g-emoji-element/examples/)

A custom element for cropping a square image. Returns x, y, width, and height.

[Repository](https://github.com/github/image-crop-element) | [Example](https://github.github.io/image-crop-element/examples/)

A client-side includes tag.

[Repository](https://github.com/github/include-fragment-element) | [Example](https://github.github.io/include-fragment-element/examples)

Markdown formatting buttons for text inputs.

[Repository](https://github.com/github/markdown-toolbar-element) | [Example](https://github.github.com/markdown-toolbar-element/examples/)

Web component extensions to the standard <time> element.

[Repository](https://github.com/github/relative-time-element) | [Example](https://github.github.io/relative-time-element/examples/)

An input element that sends its value to a server endpoint and renders the response body.

[Repository](https://github.com/github/remote-input-element) | [Example](https://github.github.io/remote-input-element/examples)

An accessible tab container element with keyboard support.

[Repository](https://github.com/github/tab-container-element) | [Example](https://github.github.com/tab-container-element/examples/)

Drag and drop task list items.

[Repository](https://github.com/github/task-lists-element) | [Example](https://github.github.io/task-lists-element/examples/)

Activates a suggestion menu to expand text snippets as you type.

[Repository](https://github.com/github/text-expander-element) | [Example](http://github.github.io/text-expander-element/examples)

A custom element that shows text as if it were being typed

[Repository](https://github.com/github/typing-effect-element) | [Example](https://github.github.com/typing-effect-element/examples/)

"dependencies": {

"auto-check-element": "github/auto-check-element",

"auto-complete-element": "github/auto-complete-element",

"clipboard-copy-element": "github/clipboard-copy-element",

"details-dialog-element": "github/details-dialog-element",

"details-menu-element": "github/details-menu-element",

"file-attachment-element": "github/file-attachment-element",

"filter-input-element": "github/filter-input-element",

"g-emoji-element": "github/g-emoji-element",

"image-crop-element": "github/image-crop-element",

"include-fragment-element": "github/include-fragment-element",

"markdown-toolbar-element": "github/markdown-toolbar-element",

"relative-time-element": "github/relative-time-element",

"remote-input-element": "github/remote-input-element",

"tab-container-element": "github/tab-container-element",

"task-lists-element": "github/task-lists-element",

"text-expander-element": "github/text-expander-element",

"typing-effect-element": "github/typing-effect-element"

}

"dependencies": {

"@github/auto-check-element": "*",

"@github/auto-complete-element": "*",

"@github/clipboard-copy-element": "*",

"@github/details-dialog-element": "*",

"@github/details-menu-element": "*",

"@github/file-attachment-element": "*",

"@github/filter-input-element": "*",

"@github/g-emoji-element": "*",

"@github/image-crop-element": "*",

"@github/include-fragment-element": "*",

"@github/markdown-toolbar-element": "*",

"@github/relative-time-element": "*",

"@github/remote-input-element": "*",

"@github/tab-container-element": "*",

"@github/task-lists-element": "*",

"@github/text-expander-element": "*",

"@github/typing-effect-element": "*"

}