harmony_regexp_property.js

const gcs = {

      Lu: 'ABC',
      Ll: 'абв',
      Lt: 'ᾼῌῼ',
  get LC(){return this.Lu + this.Ll + this.Lt},
      Lm: 'ʰʱʲ',
      Lo: 'אבג',
  get L() {return Object.keys(this).filter(k => /^L[a-z]$/.test(k))
                                   .map(k => this[k])
                                   .join('');
          },
  
      Mn: '\u0300\u0301\u0302',
      Mc: '\u0903\u093B\u093E',
      Me: '\u0488\u0489\u1ABE',
  get M() {return Object.keys(this).filter(k => /^M[a-z]$/.test(k))
                                   .map(k => this[k])
                                   .join('');
          },
  
      Nd: '123',
      Nl: 'ᛮᛯᛰ',
      No: '¼½¾',
  get N() {return Object.keys(this).filter(k => /^N[a-z]$/.test(k))
                                   .map(k => this[k])
                                   .join('');
          },
  
      Pc: '_‿⁀',
      Pd: '-–—',
      Ps: '([{',
      Pe: ')]}',
      Pi: '«‘“',
      Pf: '»’”',
      Po: '!"#',
  get P() {return Object.keys(this).filter(k => /^P[a-z]$/.test(k))
                                   .map(k => this[k])
                                   .join('');
          },
  
      Sm: '+<=',
      Sc: '$¢£',
      Sk: '^`¨',
      So: '¦©®',
  get S() {return Object.keys(this).filter(k => /^S[a-z]$/.test(k))
                                   .map(k => this[k])
                                   .join('');
          },
  
      Zs: '\u00A0\u1680\u2000',
      Zl: '\u2028',
      Zp: '\u2029',
  get Z() {return Object.keys(this).filter(k => /^Z[a-z]$/.test(k))
                                   .map(k => this[k])
                                   .join('');
          },
  
      Cc: '\u0000\u0001\u0002',
      Cf: '\u00AD\u0600\u0601',
      Cs: '\uD800\uDB7F\uDB80',
      Co: '\uE000\uF8FF\u{F0000}',
      Cn: '',
  get C() {return Object.keys(this).filter(k => /^C[a-z]$/.test(k))
                                   .map(k => this[k])
                                   .join('');
          },

};

Object.keys(gcs).forEach(gc => {
  let result;
  try {
    result = gcs[gc].match( new RegExp(`\\p{${gc}}+`, 'ug') );
  } catch(e) {
    result = e.message;
  }
  console.log(`${gc}:\t${result}`);
});