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Bust

Add the server's revision to an asset URL.

// Server option
revision: 'v2'
function handler(state) {
  return {
    image: state.bust('/img/logo.svg'),
    // '/img/logo.svg?v=v2'
    thumbnail: state.bust('/img/logo.svg?size=small')
    // '/img/logo.svg?size=small&v=v2'
  }
}

An existing v parameter is preserved. An empty revision adds no parameter.

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