Find Words That Can Be Formed by Characters LeetCode solution in JavaScript

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var countCharacters = function (words, chars) {
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  let arr = [];
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  loop1: for (word of words) {
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    let characters = chars;
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    loop2: for (char of word) {
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      if (characters.indexOf(char) === -1) {
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        continue loop1;
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      }
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      characters = characters.replace(char, "");
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    }
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    arr.push(word);
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  }
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  return arr.join("").length;
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};