replaced lets with consts

lib/single-file/uglifycss.js

@@ -79,8 +79,7 @@ this.uglifycss = (() => {
 		const maxIndex = css.length - 1;
 		const sb = [];
 
-		let appendIndex = 0;
-		let match;
+		let appendIndex = 0, match;
 
 		// Since we need to account for non-base64 data urls, we need to handle
 		// ' and ) being part of the data string. Hence switching to indexOf,
@@ -89,16 +88,14 @@ this.uglifycss = (() => {
 
 		while ((match = pattern.exec(css)) !== null) {
 
-			let startIndex = match.index + match[1].length;  // 'url('.length()
+			const startIndex = match.index + match[1].length;  // 'url('.length()
 			let terminator = match[2];         // ', " or empty (not quoted)
 
 			if (terminator.length === 0) {
 				terminator = ")";
 			}
 
-			let foundTerminator = false;
-
-			let endIndex = pattern.lastIndex - 1;
+			let foundTerminator = false, endIndex = pattern.lastIndex - 1;
 
 			while (foundTerminator === false && endIndex + 1 <= maxIndex) {
 				endIndex = css.indexOf(terminator, endIndex + 1);
@@ -126,13 +123,11 @@ this.uglifycss = (() => {
 						terminator = "";
 					}
 
-					let url;
-
-					url = terminator + token + terminator;
+					const url = terminator + token + terminator;
 
 					preservedTokens.push(url);
 
-					let preserver = "url(" + ___PRESERVED_TOKEN_ + (preservedTokens.length - 1) + "___)";
+					const preserver = "url(" + ___PRESERVED_TOKEN_ + (preservedTokens.length - 1) + "___)";
 					sb.push(preserver);
 
 				} else {
@@ -171,8 +166,7 @@ this.uglifycss = (() => {
 		const maxIndex = css.length - 1;
 		const sb = [];
 
-		let appendIndex = 0;
-		let match;
+		let appendIndex = 0, match;
 
 		// Since we need to account for non-base64 data urls, we need to handle
 		// ' and ) being part of the data string. Hence switching to indexOf,
@@ -181,15 +175,14 @@ this.uglifycss = (() => {
 
 		while ((match = pattern.exec(css)) !== null) {
 
-			let startIndex = match.index + 4;  // 'url('.length()
+			const startIndex = match.index + 4;  // 'url('.length()
 			let terminator = match[1];         // ', " or empty (not quoted)
 
 			if (terminator.length === 0) {
 				terminator = ")";
 			}
 
-			let foundTerminator = false;
-			let endIndex = pattern.lastIndex - 1;
+			let foundTerminator = false, endIndex = pattern.lastIndex - 1;
 
 			while (foundTerminator === false && endIndex + 1 <= maxIndex) {
 				endIndex = css.indexOf(terminator, endIndex + 1);
@@ -209,7 +202,7 @@ this.uglifycss = (() => {
 			if (foundTerminator) {
 
 				let token = css.substring(startIndex, endIndex);
-				let parts = token.split(",");
+				const parts = token.split(",");
 				if (parts.length > 1 && parts[0].slice(-7) == ";base64") {
 					token = token.replace(/\s+/g, "");
 				} else {
@@ -220,7 +213,7 @@ this.uglifycss = (() => {
 
 				preservedTokens.push(token);
 
-				let preserver = "url(" + ___PRESERVED_TOKEN_ + (preservedTokens.length - 1) + "___)";
+				const preserver = "url(" + ___PRESERVED_TOKEN_ + (preservedTokens.length - 1) + "___)";
 				sb.push(preserver);
 
 				appendIndex = endIndex + 1;
@@ -259,14 +252,13 @@ this.uglifycss = (() => {
 		const pattern = /(=\s*?["']?)?#([0-9a-f])([0-9a-f])([0-9a-f])([0-9a-f])([0-9a-f])([0-9a-f])(\}|[^0-9a-f{][^{]*?\})/gi;
 		const sb = [];
 
-		let index = 0;
-		let match;
+		let index = 0, match;
 
 		while ((match = pattern.exec(css)) !== null) {
 
 			sb.push(css.substring(index, match.index));
 
-			let isFilter = match[1];
+			const isFilter = match[1];
 
 			if (isFilter) {
 				// Restore, maintain case, otherwise filter will break
@@ -304,8 +296,7 @@ this.uglifycss = (() => {
 
 		const pattern = /@[a-z0-9-_]*keyframes\s+[a-z0-9-_]+\s*{/gi;
 
-		let index = 0;
-		let buffer;
+		let index = 0, buffer;
 
 		const preserve = (part, i) => {
 			part = part.replace(/(^\s|\s$)/g, "");
@@ -328,12 +319,12 @@ this.uglifycss = (() => {
 			index += startIndex;
 			startIndex = index;
 
-			let len = content.length;
-			let buffers = [];
+			const len = content.length;
+			const buffers = [];
 
 			for (; index < len; ++index) {
 
-				let ch = content.charAt(index);
+				const ch = content.charAt(index);
 
 				if (ch === "{") {
 
@@ -394,12 +385,11 @@ this.uglifycss = (() => {
 
 		const table = [];
 
-		let from = 0;
-		let end;
+		let from = 0, end;
 
 		while (true) { // eslint-disable-line no-constant-condition
 
-			let start = content.indexOf("/*", from);
+			const start = content.indexOf("/*", from);
 
 			if (start > -1) {
 
@@ -467,8 +457,8 @@ this.uglifycss = (() => {
 		// strings are safe, now wrestle the comments
 		for (let i = 0, len = comments.length; i < len; i += 1) {
 
-			let token = comments[i];
-			let placeholder = "___PRESERVE_CANDIDATE_COMMENT_" + i + "___";
+			const token = comments[i];
+			const placeholder = "___PRESERVE_CANDIDATE_COMMENT_" + i + "___";
 
 			// ! in the first position of the comment means preserve
 			// so push to the preserved tokens keeping the !
@@ -501,7 +491,7 @@ this.uglifycss = (() => {
 			// keep empty comments after child selectors (IE7 hack)
 			// e.g. html >/**/ body
 			if (token.length === 0) {
-				let startIndex = content.indexOf(placeholder);
+				const startIndex = content.indexOf(placeholder);
 				if (startIndex > 2) {
 					if (content.charAt(startIndex - 3) === ">") {
 						preservedTokens.push("");
@@ -598,7 +588,7 @@ this.uglifycss = (() => {
 
 		// preserve 0% in hsl and hsla color definitions
 		content = content.replace(/(hsla?)\(([^)]+)\)/g, (_, f1, f2) => {
-			var f0 = [];
+			const f0 = [];
 			f2.split(",").forEach(part => {
 				part = part.replace(/(^\s+|\s+$)/g, "");
 				if (part === "0%") {
@@ -688,8 +678,7 @@ this.uglifycss = (() => {
 		// this makes it more likely that it'll get further compressed in the next step.
 		pattern = /rgb\s*\(\s*([0-9,\s]+)\s*\)/gi;
 		content = content.replace(pattern, (_, f1) => {
-			const rgbcolors = f1.split(",");
-			let hexcolor = "#";
+			let rgbcolors = f1.split(","), hexcolor = "#";
 			for (let i = 0; i < rgbcolors.length; i += 1) {
 				let val = parseInt(rgbcolors[i], 10);
 				if (val < 16) {
@@ -743,7 +732,7 @@ this.uglifycss = (() => {
 			const lines = [];
 			let line = [];
 			for (let i = 0, len = content.length; i < len; i += 1) {
-				let ch = content.charAt(i);
+				const ch = content.charAt(i);
 				line.push(ch);
 				if (ch === "}" && line.length > options.maxLineLen) {
 					lines.push(line.join(""));