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    CanJS is a collection of client-side JavaScript architectural libraries.

    Web Components

    CanJS’s StacheElement allows you to create Web Components with observable properties and live-bound templates.

    class Counter extends StacheElement {
        static view = `
            Count: <span>{{ this.count }}</span>
            <button on:click="this.increment()">+1</button>
        static props = {
            count: 0
        increment() {
    customElements.define("my-counter", Counter);

    Model layer

    Components shouldn’t be concerned with how data is fetched, updated, or cached.

    CanJS provides the right abstractions for your model code to be cleanly separated from your UI code. Learn more…

    Promises in templates

    CanJS’s stache templating language can directly read the state and values from Promises.

    No need to write any extra code to determine whether a Promise is pending, resolved, or rejected. Learn more…

    {{# if(this.promise.isPending) }}
    {{/ if }}
    {{# if(this.promise.isRejected) }}
      Error: {{ this.promise.reason }}
    {{/ if }}
    {{# if(this.promise.isResolved) }}
      Result: {{ this.promise.value }}
    {{/ if }}

    Real-time list updating

    After data is created, updated, or destroyed, CanJS automatically updates your lists for you.

    Filtering and sorting are preserved, so you don’t have to manually update your lists or fetch the same data again. Learn more…

    Getting Started

    Ready to get started? See the Setting Up CanJS, API Docs and Guides pages.

    Support / Contributing

    Before you make an issue, please read our Contributing guide.

    You can find the core team on Slack.

    Release History

    See Releases.


    MIT License.

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