JavaScript ES6 字符串新特性详解：Unicode、模板、遍历与查找

  console.log('\uD83D\uDE80');

  console.log('\u{1F680}');

  let first = 'Jane';
  let last = 'Doe';
  console.log(`Hello ${first} ${last}!`);
    // Hello Jane Doe!

  let multiLine = `
  This is
  a string
  with multiple
  lines`;

  let raw = String.raw`Not a newline: \n`;
  console.log(raw === 'Not a newline: \\n'); // true

  for (let ch of 'abc') {
    console.log(ch);
  }
  // Output:
  // a
  // b
  // c

  let chars = [...'abc'];
    // ['a', 'b', 'c']

  > 'hello'.startsWith('hell')
  true
  > 'hello'.endsWith('ello')
  true
  > 'hello'.includes('ell')
  true

  > 'hello'.startsWith('ello', 1)
  true
  > 'hello'.endsWith('hell', 4)
  true
  
  > 'hello'.includes('ell', 1)
  true
  > 'hello'.includes('ell', 2)
  false

  > 'doo '.repeat(3)
  'doo doo doo '