replaced vars with lets and consts

lib/single-file/parse-srcset.js

@@ -33,7 +33,7 @@ this.parseSrcset = (() => {
 		}
 
 		function collectCharacters(regEx) {
-			var chars,
+			let chars,
 				match = regEx.exec(input.substring(pos));
 			if (match) {
 				chars = match[0];
@@ -42,36 +42,30 @@ this.parseSrcset = (() => {
 			}
 		}
 
-		var inputLength = input.length,
-
-			// (Don"t use \s, to avoid matching non-breaking space)
-			/* eslint-disable no-control-regex */
-			regexLeadingSpaces = /^[ \t\n\r\u000c]+/, // 
-			regexLeadingCommasOrSpaces = /^[, \t\n\r\u000c]+/,
-			regexLeadingNotSpaces = /^[^ \t\n\r\u000c]+/,
-			regexTrailingCommas = /[,]+$/,
-			regexNonNegativeInteger = /^\d+$/,
-			/* eslint-enable no-control-regex */
-
-			// ( Positive or negative or unsigned integers or decimals, without or without exponents.
-			// Must include at least one digit.
-			// According to spec tests any decimal point must be followed by a digit.
-			// No leading plus sign is allowed.)
-			// https://html.spec.whatwg.org/multipage/infrastructure.html#valid-floating-point-number
-			regexFloatingPoint = /^-?(?:[0-9]+|[0-9]*\.[0-9]+)(?:[eE][+-]?[0-9]+)?$/,
-
-			url,
-			descriptors,
-			currentDescriptor,
-			state,
-			c,
-
+		const inputLength = input.length;
+
+		// (Don"t use \s, to avoid matching non-breaking space)
+		/* eslint-disable no-control-regex */
+		const regexLeadingSpaces = /^[ \t\n\r\u000c]+/;
+		const regexLeadingCommasOrSpaces = /^[, \t\n\r\u000c]+/;
+		const regexLeadingNotSpaces = /^[^ \t\n\r\u000c]+/;
+		const regexTrailingCommas = /[,]+$/;
+		const regexNonNegativeInteger = /^\d+$/;
+		/* eslint-enable no-control-regex */
+
+		// ( Positive or negative or unsigned integers or decimals, without or without exponents.
+		// Must include at least one digit.
+		// According to spec tests any decimal point must be followed by a digit.
+		// No leading plus sign is allowed.)
+		// https://html.spec.whatwg.org/multipage/infrastructure.html#valid-floating-point-number
+		const regexFloatingPoint = /^-?(?:[0-9]+|[0-9]*\.[0-9]+)(?:[eE][+-]?[0-9]+)?$/;
+
+		let url, descriptors, currentDescriptor, state, c,
 			// 2. Let position be a pointer into input, initially pointing at the start
 			//    of the string.
-			pos = 0,
-
-			// 3. Let candidates be an initially empty source set.
-			candidates = [];
+			pos = 0;
+		// 3. Let candidates be an initially empty source set.
+		const candidates = [];
 
 		// 4. Splitting loop: Collect a sequence of characters that are space
 		//    characters or U+002C COMMA characters. If any U+002C COMMA characters
@@ -240,14 +234,14 @@ this.parseSrcset = (() => {
 		function parseDescriptors() {
 
 			// 9. Descriptor parser: Let error be no.
-			var pError = false,
+			let pError = false,
 
 				// 10. Let width be absent.
 				// 11. Let density be absent.
 				// 12. Let future-compat-h be absent. (We"re implementing it now as h)
 				w, d, h, i,
-				candidate = {},
 				desc, lastChar, value, intVal, floatVal;
+			const candidate = {};
 
 			// 13. For each descriptor in descriptors, run the appropriate set of steps
 			// from the following list: