Created
July 5, 2016 20:07
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Calculate and display Flesch–Kincaid readability scores as a user types
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <title>FK Readability Score</title> | |
| <meta charset="UTF-8"> | |
| </head> | |
| <body> | |
| <textarea id="theText" rows="5" cols="100"></textarea> | |
| </body> | |
| <script> | |
| document.getElementById("theText").addEventListener("keyup", function(){ | |
| var text = document.getElementById("theText").value; | |
| var sylCount = 0; | |
| var processedItems = 0; | |
| var textArray = text.split(' '); | |
| textArray.forEach(function(word) { | |
| sylCount += syllable_count(word); | |
| processedItems++; | |
| if(processedItems==textArray.length){ | |
| // console.log("syllables", sylCount); | |
| // console.log("words",textArray.length); | |
| // console.log("sentences", text.split(".").length-1); | |
| // console.log("Reading Ease is"); | |
| // console.log(readingEase(sylCount, textArray.length -1, text.split(".").length)); | |
| // console.log("Grade level is"); | |
| // console.log(gradeLevel(sylCount, textArray.length -1, text.split(".").length)); | |
| document.getElementById("re-score").innerText = readingEase(sylCount, textArray.length -1, text.split(".").length); | |
| document.getElementById("rg-score").innerText = gradeLevel(sylCount, textArray.length -1, text.split(".").length); | |
| } | |
| }); | |
| }); | |
| function syllable_count(word) { | |
| if(word.indexOf(",") > -1){word = word.substring(0,-1);} | |
| if(!isNaN(word)){return 1;} | |
| // Copied from Blake Tarter http://codepen.io/blaketarter/pen/hJICz | |
| if(word.length === 0) {return 0; } | |
| word = word.toLowerCase(); | |
| if(word.length <= 3) { return 1; } | |
| word = word.replace(' ', '
'); | |
| word = word.replace(/(?:[^laeiouy]es|ed|[^laeiouy]e)$/, ''); | |
| word = word.replace(/^y/, ''); | |
| return word.match(/[aeiouy]{1,2}/g).length; | |
| } | |
| function readingEase(syllables, words, sentences){ | |
| return 206.835 - 1.015*(words/sentences) - 84.6*(syllables/words); | |
| } | |
| function gradeLevel(syllables, words, sentences){ | |
| return 0.39*(words/sentences) + 11.8 * (syllables/words) - 15.59; | |
| } | |
| </script> | |
| </html> |
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