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HTML

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CSS

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CSS Base

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JavaScript

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JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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HTML 

              
                <div id="sdnPlayer"></div>

<script src="//player.3qsdn.com/js3q.latest.js"></script>
!

CSS 

              
                body {
  margin: 0 auto;
  max-width: 50rem;
  background: #eee;
}
!

JS 

              
                const dataId_main = '66e68995-11ca-11e8-9273-002590c750be'
const dataId_second = '1bc8cbdc-73c5-11e8-ae4b-0cc47a188158'

let player

// Main method to set up the player
const loadPlayer = (dataId) => {
  // Destroy the existing player
  if (player && typeof player.destroy === 'function') {
    player.destroy()
  }
  
  // Initialize the player
  player  = new js3q({
    container: 'sdnPlayer',
    dataid: dataId,
    controlBarAutoHide: false,
  })
  
  player.on('media.ready', () => {
    // Set the dataid to the opposite of the current
    const nextDataId = dataId === dataId_main ? dataId_second : dataId_main
    
    attachButton(nextDataId)
  })
}

// Create the Button and attach it to the ControlBar
function attachButton(dataid) {
  // If there is already a button, skip
  if (document.getElementById('sdnPlayer-switch-button')) return

  // Define the button
  const switchBtnEl = document.createElement('js3q-button')
  switchBtnEl.setAttribute('id', 'sdnPlayer-switch-button')
  switchBtnEl.setAttribute('class', 'sdn-button-right sdnicbsun-chat')
  switchBtnEl.setAttribute('tooltip', 'Switch language')
  switchBtnEl.addEventListener('click', () => loadPlayer(dataid))

  // Attach the button to the control bar
  const controlbarEl = document.getElementById('sdnPlayer-chrome')
  controlbarEl.appendChild(switchBtnEl)  
}

// Initial Call
loadPlayer(dataId_main)
!
999px

Console