prefer-string-slice

📝 Prefer String#slice() over String#substr() and String#substring().

💼 This rule is enabled in the following configs: ✅ recommended, ☑️ unopinionated.

🔧 This rule is automatically fixable by the --fix CLI option.

String#substr() and String#substring() are the two lesser known legacy ways to slice a string. It's better to use String#slice() as it's a more popular option with clearer behavior that has a consistent Array counterpart.

Examples

// ❌
foo.substr(start, length);

// ❌
foo.substring(indexStart, indexEnd);

// ✅
foo.slice(beginIndex, endIndex);