JavaScript Rules | PMD Source Code Analyzer (original) (raw)

Index of all built-in rules available for JavaScript

Table of Contents

Best Practices

Rules which enforce generally accepted best practices.

• AvoidWithStatement: Avoid using with - it’s bad news
• ConsistentReturn: ECMAScript does provide for return types on functions, and therefore there is no solid rule as to…
• GlobalVariable: This rule helps to avoid using accidently global variables by simply missing the "var" declaratio…
• ScopeForInVariable: A for-in loop in which the variable name is not explicitly scoped to the enclosing scope with the…
• UseBaseWithParseInt: This rule checks for usages of parseInt. While the second parameter is optional and usually defau…

Code Style

Rules which enforce a specific coding style.

• AssignmentInOperand: Avoid assignments in operands; this can make code more complicated and harder to read. This is s…
• ForLoopsMustUseBraces: Avoid using ‘for’ statements without using curly braces.
• IfElseStmtsMustUseBraces: Avoid using if..else statements without using curly braces.
• IfStmtsMustUseBraces: Avoid using if statements without using curly braces.
• NoElseReturn: The else block in a if-else-construct is unnecessary if the ‘if’ block contains a return. Then th…
• UnnecessaryBlock: An unnecessary Block is present. Such Blocks are often used in other languages to introduce a ne…
• UnnecessaryParentheses: Unnecessary parentheses should be removed.
• UnreachableCode: A ‘return’, ‘break’, ‘continue’, or ‘throw’ statement should be the last in a block. Statements a…
• WhileLoopsMustUseBraces: Avoid using ‘while’ statements without using curly braces.

Error Prone

Rules to detect constructs that are either broken, extremely confusing or prone to runtime errors.

• AvoidTrailingComma: This rule helps improve code portability due to differences in browser treatment of trailing comm…
• EqualComparison: Using == in condition may lead to unexpected results, as the variables are automatically casted t…
• InaccurateNumericLiteral: The numeric literal will have a different value at runtime, which can happen if you provide too m…
• InnaccurateNumericLiteral: Deprecated The rule has been renamed. Use instead InaccurateNumericLiteral.

Performance

Rules that flag suboptimal code.

• AvoidConsoleStatements: Using the console for logging in production might negatively impact performance. In addition, log…