https://jnjinnovativemedicinehub.com/modules/custom/jpro_business/js/LetterRule.js?tlfh8v

1/**
2 * @file Rule class for "has letter" validation.
3 */
4(function (JproRules) {
5  const regex = new RegExp('[a-zA-Z]');
6  JproRules.letterValidate = (value) => {
7    return regex.test(value);
8  };
9})(JproRules);

Line numbers count LF bytes from the start of the resource, as the search results do. Vendor segments are library code the classifier recognised; they are stored but not indexed. Bytes are shown as Latin1 characters, one per byte.