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>

Author: artmaks

lib/internal/querystring.js

@@ -3,7 +3,7 @@
 const{ERR_INVALID_URI}=require('internal/errors').codes;
 
 consthexTable=newArray(256);
-for(vari=0;i<256;++i)
+for(leti=0;i<256;++i)
 hexTable[i]='%'+((i<16 ? '0' : '')+i.toString(16)).toUpperCase();
 
 constisHexTable=[
@@ -30,11 +30,11 @@ function encodeStr(str, noEscapeTable, hexTable) {
 if(len===0)
 return'';
 
-varout='';
-varlastPos=0;
+letout='';
+letlastPos=0;
 
-for(vari=0;i<len;i++){
-varc=str.charCodeAt(i);
+for(leti=0;i<len;i++){
+letc=str.charCodeAt(i);
 
 // ASCII
 if(c<0x80){
@@ -73,7 +73,7 @@ function encodeStr(str, noEscapeTable, hexTable) {
 if(i>=len)
 thrownewERR_INVALID_URI();
 
-varc2=str.charCodeAt(i)&0x3FF;
+constc2=str.charCodeAt(i)&0x3FF;
 
 lastPos=i+1;
 c=0x10000+(((c&0x3FF)<<10)|c2);