Automated Readability Index, Flesch-Kincaid (ease/level), Gunning-Fog, SMOG Index, Coleman-Liau
> const testPhrase = 'No kidding - Lorenzo called off his trip to visit Mexico City just because they told him the conquistadores were extinct.'; > Readability.automatedReadability(testPhrase); 11.274285714285718 > Readability.smog(testPhrase); 10.065306667255596 > Readability.gunningFog(testPhrase); 14.114285714285714 > Readability.colemanLiau(testPhrase); 11.952857142857141 > Readability.fleschKincaid(testPhrase);{ease: 52.57714285714289, gradeLevel: 11.142857142857142 }