Merge pull request #18 from journey-ad/patch-1

Avoid uninitialized let in nested for-loop headers for ES5 compat

Author: davidje13

docs/integrity.txt

@@ -1,6 +1,6 @@
-index.mjs:              sha384-m4b9mo8rku6/YQbV1e52UTglSzniaJVeyuq4NnpxRZtq9UrxWXKj+/Mx9MvtPRhK
-index.js:               sha384-jh47I3nzhofHfyfvgZFdmqUk4CYrsTIaq9LwhVmsWOFiX88x2h46P06/aDeaEtXp
-nano.mjs:               sha384-avNlMHLjqxeTtXysYm13MNj05YYIEl5Fg3itpc7p/JdjS3ULukmDYKaqUMtBj6tT
+index.mjs:              sha384-ix/UIenTZ8IyJxa+sJjONUP54ZVdea4Lx1HLnQ6H19foghKqyGi2tWwKqEBZ/fMP
+index.js:               sha384-rMLAHwGIF45U925zCR19N4xrcJ0oWFePEJ1n97/WvrJF+ON9OcD7oky9FnZJjeaj
+nano.mjs:               sha384-XThBBrKCQC9Alnv0+HEu/eQjYCSDEkmYTNMzQyLrfFpf4HDpj/Mhti8J8kTD0liW
 extras/svg.mjs:         sha384-Gk8g8nmt6RvyscmK2SxGhYHjrlr8PGRa9CD96IKO9EfLBGE1Wpj/pT8TgbuUXYXM
 extras/svg.js:          sha384-VYnYxwUAQvjDtTiso2ihlfJcfZY60ZgYYdd5YKEO1B4BtZ3P7fxQ5WNuPPG/i8Np
 extras/node_export.mjs: sha384-jY8CQmq1wxq5w4nuvoBv5cQ+YlO4CAy1qLQ1ZzisUY+YKNSk0IiiQBG6xzZ4t7il
@@ -11,4 +11,4 @@ extras/vue.mjs:         sha384-Q4U/qU20x7la3XGJDH1okfzFYN5r+AahC/KAu3xJi5vmOj0GP
 extras/vue.js:          sha384-lkJRxa/w/MmxmQCuZWCv3qKGlSyuRD86eaGUWktxjO/n7pcUstsLUW2COHlYDYQ4
 extras/errors.mjs:      sha384-LaUpr3MpI+ZWjDG8L54lwBzgymdm+C1fijP3Z3HukZOFOn3nmRUtgK5aTmOSVm/q
 extras/errors.js:       sha384-lpwl8zlB1GwhvS1ftgUv4mCvOhlixuRa8fRag2aZ2PEEPKQ++l+IjhZL8lhbZMVe
-webcomponent.mjs:       sha384-9dDat7/8CJ6E17L+k4st+cuCTZKpoAQ8TnkM+IqePpen71TrCZHaqfWzeD+qXg48
+webcomponent.mjs:       sha384-QTlW/1U8Fi4zgSsbEx+i8+CHNfzzIWxgw8hH0hc4qwVBJN5omqCsXJ6a7d8aDzKd

docs/stats.txt

@@ -1,6 +1,6 @@
-index.mjs:                  6898 bytes /     3670 bytes (compressed)
-index.js:                   6914 bytes /     3661 bytes (compressed)
-nano.mjs:                   3763 bytes /     2159 bytes (compressed)
+index.mjs:                  6897 bytes /     3667 bytes (compressed)
+index.js:                   6913 bytes /     3661 bytes (compressed)
+nano.mjs:                   3762 bytes /     2160 bytes (compressed)
 extras/svg.mjs:             1333 bytes /      945 bytes (compressed)
 extras/svg.js:              1350 bytes /      942 bytes (compressed)
 extras/node_export.mjs:     1069 bytes /      785 bytes (compressed)
@@ -11,4 +11,4 @@ extras/vue.mjs:             1059 bytes /      686 bytes (compressed)
 extras/vue.js:              1066 bytes /      684 bytes (compressed)
 extras/errors.mjs:           287 bytes /      342 bytes (compressed)
 extras/errors.js:            287 bytes /      340 bytes (compressed)
-webcomponent.mjs:           8634 bytes /     4442 bytes (compressed)
+webcomponent.mjs:           8633 bytes /     4443 bytes (compressed)

src/qr/errorCorrection.mjs

@@ -23,7 +23,7 @@ export const calculateEC = (versionBytes, correction) => {
   const result = makeUint8Array(size);
   size = 0;
   for (const bs of blocks) {
-    for (let i = 0, prev; size !== prev; ++i) {
+    for (let i = 0, prev = -1; prev < size; ++i) {
       prev = size;
       for (const block of bs) {
         if (i < block.length) {

src/qr/score.mjs

@@ -5,14 +5,14 @@ const matches = 0b00000000001_00000000001;
 export const scoreCode = ({ size, _data }, score = 0, totalOn = 0) => {
   for (let i = 0; i < size; ++i) {
     for (let n = 0; n < 2; ++n) {
-      for (let j = 0, state = 0, consec = 0, last; j < size; ++j) {
+      for (let j = 0, state = 0, consec, last = 2; j < size; ++j) {
         const cur = _data[n ? i * size + j : j * size + i] & 1;
         totalOn += cur;
         state = ((state >> 1) | initial) & (pattern ^ (cur - 1));
         if (state & matches) {
           score += 40;
         }
-        if (cur !== last) {
+        if (cur ^ last) {
           consec = 0;
         }
         last = cur;