Add comments.

1 files changed, 4 insertions, 0 deletions

diff --git a/main.js b/main.js
index c0a3186..0a2449c 100644
--- a/main.js
+++ b/main.js
@@ -2656,6 +2656,9 @@ const STYLES = {};
       /* eslint-disable-next-line no-useless-escape */
       const m0 = /^([ +\-]?)([0-9]+)([dwmy])$/.exec(value);
       if (m0 != null) {
+        /* handling relative parameter values add some complexity, but it's worth doing since
+         * users can bookmark the URL with e.g., age-filter=-1y and visit it later with the
+         * timeframe shifted forward, thus not having to reconfigure the age filter */
         ageFilterSettings.type = 'relative';
         ageFilterSettings.operator = (m0[1] === ' ' || m0[1] === '+' || m0[1] === '') ? '>='
                                    : m0[1] === '-' ? '<='
@@ -5318,6 +5321,7 @@ const ageFilterSetActive = (function() {
       ageFilterSettings._min_ts = ageFilterSettings._max_ts = null;
       switch (filter_type) {
         case 'relative': {
+          /* save relative value so it can be autoshifted later */
           const operator = ageFilterSettings.operator = filter_settings.operator[0].value;
           ageFilterSettings.quantity = parseInt(filter_settings.quantity.value, 10);
           ageFilterSettings.unit = filter_settings.unit[0].value;