Add polyfill to support older IE versions
Add polyfill to support older IE versions

docsteer/sacnview,marcusbirkin/sacnview,marcusbirkin/sacnview,marcusbirkin/sacnview,marcusbirkin/sacnview,docsteer/sacnview,marcusbirkin/sacnview,docsteer/sacnview,marcusbirkin/sacnview,docsteer/sacnview,marcusbirkin/sacnview,docsteer/sacnview,docsteer/sacnview,docsteer/sacnview