{ const totals = pages.reduce((t,p) => { t[0] += p.sentences; t[1] += p.words; t[2] += p.syllables; t[3] += p.characters; t[4] += p.passive; t[5] += p.long; return t; },[0,0,0,0,0,0]); const getcolor = (metric,value) => { let colors = ['#27AE60','#F1C40F','#E74C3C'] switch(metric){ case 'LONG': return value < 5.5 ? colors[0] : value > 15 ? colors[2] : colors[1]; case 'PASSIVE': return value < 10.5 ? colors[0] : value > 15 ? colors[2] : colors[1]; case 'ASL': return value < 12.5 ? colors[0] : value > 18 ? colors[2] : colors[1]; case 'TRE': return value < 30.5 ? colors[2] : value > 49.9 ? colors[0] : colors[1]; case 'TFKRA': return value < 9.5 ? colors[0] : value > 12 ? colors[2] : colors[1]; default: return '#666'; } } const ASL = totals[1] / totals[0]; const ASW = totals[2] / totals[1]; const TRE = 206.835 - (1.015 * ASL) - (84.6 * ASW); const TFKRA = (0.39 * ASL) + (11.8 * ASW) - 15.59; const PASSIVE = (totals[4]/totals[0]) * 100; const LONG = (totals[5]/totals[0]) * 100; const stats = html`

Reading ease${Math.round(TRE)}
Reading grade${Math.round(TFKRA)}
Passive voice${Math.round(PASSIVE)}%
Long sentences${Math.round(LONG)}%
Words per sentence${Math.round(ASL)}

`; return stats; }