[Refactor] use slice instead of substring

Author: ljharb

lib/rules/jsx-curly-brace-presence.js

@@ -184,7 +184,7 @@ module.exports = {
             if (parentType === 'JSXAttribute') {
               textToReplace = `"${expressionType === 'TemplateLiteral'
                 ? expression.quasis[0].value.raw
-                : expression.raw.substring(1, expression.raw.length - 1)
+                : expression.raw.slice(1, -1)
               }"`;
             } else if (jsxUtil.isJSX(expression)) {
               const sourceCode = context.getSourceCode();
@@ -222,7 +222,7 @@ module.exports = {
 
           const expression = literalNode.parent.type === 'JSXAttribute'
             ? `{"${escapeDoubleQuotes(escapeBackslashes(
-              literalNode.raw.substring(1, literalNode.raw.length - 1)
+              literalNode.raw.slice(1, -1)
             ))}"}`
             : wrapWithCurlyBraces(literalNode.raw);
 

lib/rules/jsx-sort-props.js

@@ -250,7 +250,7 @@ function generateFixerFunction(node, context, reservedList) {
     sortableAttributeGroups.forEach((sortableGroup, ii) => {
       sortableGroup.forEach((attr, jj) => {
         const sortedAttr = sortedAttributeGroups[ii][jj];
-        const sortedAttrText = source.substring(sortedAttr.range[0], attributeMap.get(sortedAttr).end);
+        const sortedAttrText = source.slice(sortedAttr.range[0], attributeMap.get(sortedAttr).end);
         fixers.push({
           range: [attr.range[0], attributeMap.get(attr).end],
           text: sortedAttrText,
@@ -266,10 +266,10 @@ function generateFixerFunction(node, context, reservedList) {
     const rangeEnd = firstFixer ? firstFixer.range[1] : -0;
 
     fixers.forEach((fix) => {
-      source = `${source.substr(0, fix.range[0])}${fix.text}${source.substr(fix.range[1])}`;
+      source = `${source.slice(0, fix.range[0])}${fix.text}${source.slice(fix.range[1])}`;
     });
 
-    return fixer.replaceTextRange([rangeStart, rangeEnd], source.substr(rangeStart, rangeEnd - rangeStart));
+    return fixer.replaceTextRange([rangeStart, rangeEnd], source.slice(rangeStart, rangeEnd));
   };
 }
 

lib/rules/no-unescaped-entities.js

@@ -93,7 +93,7 @@ module.exports = {
         if (i === node.loc.end.line) {
           end = node.loc.end.column;
         }
-        rawLine = rawLine.substring(start, end);
+        rawLine = rawLine.slice(start, end);
         for (let j = 0; j < entities.length; j++) {
           for (let index = 0; index < rawLine.length; index++) {
             const c = rawLine[index];

lib/util/propTypesSort.js

@@ -181,10 +181,8 @@ function fixPropTypesSort(
       source = nodes.reduceRight((acc, attr, index) => {
         const sortedAttr = sortedAttributes[index];
         const sourceCodeText = sourceCode.getText();
-        let sortedAttrText = sourceCodeText.substring(
-          commentnodeMap.get(sortedAttr).start,
-          commentnodeMap.get(sortedAttr).end
-        );
+        const commentNode = commentnodeMap.get(sortedAttr);
+        let sortedAttrText = sourceCodeText.slice(commentNode.start, commentNode.end);
         if (sortShapeProp && isShapeProp(sortedAttr.value)) {
           const shape = getShapeProperties(sortedAttr.value);
           if (shape) {