Spot the ghost.

js/src/filters.js

1. 1// Applies the list filters from the query string: q, tag and done.
2. 2export function filterTasks(tasks, query) {
3. 3 const checks = [];
4. 4 if (query.q) checks.push(matchesText(query.q));
5. 5 if (query.tag) checks.push(hasTag(query.tag));
6. 6 if (query.done !== undefined) checks.push(hasDone(query.done));
7. 7 if (checks.length === 0) return tasks;
8. 8 return tasks.filter((task) => checks.every((check) => check(task)));
9. 9}
10. 10
11. 11const normalize = (text) => text.trim();
12. 12
13. 13function matchesText(q) {
14. 14 const needle = normalize(q);
15. 15 return (task) => normalize(task.title).includes(needle);
16. 16}
17. 17
18. 18function hasTag(tag) {
19. 19 const wanted = normalize(tag).toLowerCase();
20. 20 return (task) => task.tags.includes(wanted);
21. 21}
22. 22
23. 23function hasDone(done) {
24. 24 const wanted = Boolean(done);
25. 25 return (task) => task.done === wanted;
26. 26}