Legacy Browser Support

Cornerstone can be made to support legacy browsers by incorporating polyfills for some modern web browser features.

You may need to include polyfills for these features, depending on which browsers you target.

  • Promises represent the eventual result of an asynchronous operation. These are used by Image Loaders. You will need to polyfill Promises to use Internet Explorer 11.

Here is a lightweight Promise polyfill which is MIT Licensed.

Note: There may be further tests which could be added to the core codebase to trigger automatic fallback to Canvas rendering. If you have any specific suggestions, feel free to open an issue to discuss this.

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