Check If a Word Occurs As a Prefix of Any Word in a Sentence LeetCode solution in JavaScript

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var isPrefixOfWord = function (sentence, searchWord) {
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  let arr = sentence.split(" ");
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  for (let i = 0; i < arr.length; i++) {
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    let word = arr[i];
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    if (word.startsWith(searchWord)) return i + 1;
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  }
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  return -1;
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};