Simple javascript function to perform fuzzy search based on sequential characters and return the matching parts

getFuzzySearchMatches.js

/**
 * Returns a list of index pairs with the sequencial pieces of the query that show up on the parameter
 * The indexes are between 0 and the text length.
 * @example query = "hello", text = "ahellow", return = [{startIndex: 1, endIndex: 6}]
 * @example query = "abc_def", text = "abcdef", return = [{startIndex: 0, endIndex: 3}]
 * @example query = "abcdef", text = "abc_def", return = [{startIndex: 0, endIndex: 3}, {startIndex: 4, endIndex: 7}]
 * @example query = "abcd", text = "a b c", return = [{start:0, end:1},{start:2, end:3},{start:4, end:5}]
 * @params {string} query The search query to transverse the text
 * @params {string} text The text to find the parts that match the search query
 */
function getFuzzySearchMatches(query, text) {
    /** @type {{startIndex: number, endIndex: number}[]} */
    const parts = [];
    let matchIndex = 0;
    let obj = {startIndex: -1, endIndex: -1}
    for (let i = 0; i < text.length && matchIndex < query.length; i++) {
        //console.log("7", i, JSON.stringify(obj));
        if (obj.startIndex === -1) {
            //console.log("9", i < name.length, {differs: name[i] !== query[matchIndex]});
            while (i < text.length && text[i] !== query[matchIndex]) {
                i++;
            }
            //console.log("13", i < name.length, {matches: name[i] === query[matchIndex]});
            if (i < text.length && text[i] === query[matchIndex]) {
                obj.startIndex = i;
                obj.endIndex = i+1;
                matchIndex++;
                parts.push(obj);
            }
        } else {
            //console.log("18", i < name.length, matchIndex < query.length, name[i] === query[matchIndex]);
            while (i < text.length && matchIndex < query.length && text[i] === query[matchIndex]) {
                //console.log("20", i < name.length, matchIndex < query.length, name[i] === query[matchIndex]);
                i++;
                matchIndex++;
            }
            //console.log("24", matchIndex);
            obj.endIndex = i;
            obj = {startIndex: -1, endIndex: -1};
        }
    }
    return parts;
}