lib: change var to let/const in internal/querystring.js

PR-URL: #30286
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

lib/internal/querystring.js

@@ -3,7 +3,7 @@
 const { ERR_INVALID_URI } = require('internal/errors').codes;
 
 const hexTable = new Array(256);
-for (var i = 0; i < 256; ++i)
+for (let i = 0; i < 256; ++i)
   hexTable[i] = '%' + ((i < 16 ? '0' : '') + i.toString(16)).toUpperCase();
 
 const isHexTable = [
@@ -30,11 +30,11 @@ function encodeStr(str, noEscapeTable, hexTable) {
   if (len === 0)
     return '';
 
-  var out = '';
-  var lastPos = 0;
+  let out = '';
+  let lastPos = 0;
 
-  for (var i = 0; i < len; i++) {
-    var c = str.charCodeAt(i);
+  for (let i = 0; i < len; i++) {
+    let c = str.charCodeAt(i);
 
     // ASCII
     if (c < 0x80) {
@@ -73,7 +73,7 @@ function encodeStr(str, noEscapeTable, hexTable) {
     if (i >= len)
       throw new ERR_INVALID_URI();
 
-    var c2 = str.charCodeAt(i) & 0x3FF;
+    const c2 = str.charCodeAt(i) & 0x3FF;
 
     lastPos = i + 1;
     c = 0x10000 + (((c & 0x3FF) << 10) | c2);