3 examples of 'count words javascript' in JavaScript

1
function countWords(input) {
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    let words = [];
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    for (let i = 0; i < input.length; i++) {
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       words = words.concat(input[i]
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           .toLowerCase()
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           .split(/\W+/)
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           .filter(x => x !== ''));
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    }
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    let map = new Map();
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    for (let i = 0; i < words.length; i++) {
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        let currentWord = words[i];
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        if(!map.has(currentWord)){
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            map.set(currentWord, 1);
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            continue;
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        }
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        map.set(currentWord,map.get(currentWord) + 1);
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    }
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    let arr = Array.from(map).sort();
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    for (let key of arr) {
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        console.log(`'${key[0]}' -> ${key[1]} times`)
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    }
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}

6
function countEachWord( textInput ) {
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  // split up input string into arrays by spaces and newline chars
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  const whiteSpaceChars = /\s/;
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  const allWords = textInput.split(whiteSpaceChars);
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  let wordCountObject = {};
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  for (var i = 0; i < allWords.length; i++) {
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    // get rid of punctuation and make word lowercase
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    let currentWord = allWords[i].replace(/\W/g, '').toLowerCase();
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    if (!wordCountObject[currentWord]) {
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      wordCountObject[currentWord] = 1;
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    } else {
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      wordCountObject[currentWord] += 1;
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    }
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  }
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  return wordCountObject;
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}

9
export function wordCount (string) {
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	return string ? (string.replace(/['";:,.?¿\-!¡]+/g, '').match(/\S+/g) || []).length : 0
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}