Alterando variaveis de let para const e mudando os valores da linha 1…

…5 e 81 para !== e ===

lib/barcode.js

@@ -12,7 +12,7 @@ exports.binaryRepresentationForBarcodeData = function (barcodeData) {
     9: '01010'
   }
 
-  if (barcodeData.length % 2 != 0) {
+  if (barcodeData.length % 2 !== 0) {
     barcodeData = '0' + barcodeData
   }
 
@@ -35,7 +35,7 @@ exports.binaryRepresentationForBarcodeData = function (barcodeData) {
 
 // Convert a value to a little endian hexadecimal value
 exports._getLittleEndianHex = function (value) {
-  let result = []
+  const result = []
 
   for (let bytes = 4; bytes > 0; bytes--) {
     result.push(String.fromCharCode(value & 0xff))
@@ -69,16 +69,16 @@ exports._bmpHeader = function (width, height) {
 }
 
 exports.bmpLineForBarcodeData = function (barcodeData) {
-  let binaryRepresentation = exports.binaryRepresentationForBarcodeData(barcodeData)
+  const binaryRepresentation = exports.binaryRepresentationForBarcodeData(barcodeData)
 
   let bmpData = []
   let black = true
   let offset = 0
 
   for (let i = 0; i < binaryRepresentation.length; i++) {
-    let digit = binaryRepresentation[i]
-    let color = black ? String.fromCharCode(0, 0, 0, 0) : String.fromCharCode(255, 255, 255, 0)
-    let pixelsToDraw = (digit == '0') ? 1 : 3
+    const digit = binaryRepresentation[i]
+    const color = black ? String.fromCharCode(0, 0, 0, 0) : String.fromCharCode(255, 255, 255, 0)
+    let pixelsToDraw = (digit === '0') ? 1 : 3
 
     for (let j = 0; j < pixelsToDraw; j++) {
       bmpData[offset++] = color