【ECMAScript 6 入門】4.字符串的擴展

// 傳統寫法爲
// 'User '
// + user.name
// + ' is not authorized to do '
// + action
// + '.'

`User ${user.name} is not authorized to do ${action}.`);

const tmpl = addrs => `
  <table>
  ${addrs.map(addr => `
    <tr><td>${addr.first}</td></tr>
    <tr><td>${addr.last}</td></tr>
  `).join('')}
  </table>
`;

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