refactor: separate ignore to two separate methods

Author: ahmadalfy

lib/index.js

@@ -22,9 +22,9 @@ module.exports = function (options) {
       if (imgNode.skip) return imgNode
       var classes = imgNode.attrs && imgNode.attrs.class && (imgNode.attrs.class.split(' ') || [])
       var extension = imgNode.attrs.src.split('.').pop()
-      var isIgnore =
-        (options.classIgnore.filter(className => classes.includes(className)).length > 0) ||
-        (options.extensionIgnore.filter(fileExtension => fileExtension === extension).length > 0)
+      var isIgnoredByClass = options.classIgnore.filter(className => classes.includes(className)).length > 0
+      var isIgnoredByExtension = options.extensionIgnore.filter(fileExtension => fileExtension === extension).length > 0
+      var isIgnore = isIgnoredByClass || isIgnoredByExtension
       if (isIgnore) return imgNode
       switch (imgNode.tag) {
         case 'amp-img':