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Showing content from https://docs.pmd-code.org/latest/pmd_rules_ecmascript.html below:

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

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 sâ¦
ForLoopsMustUseBraces: Avoid using âforâ 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 âifâ block contains a return. Then thâ¦
UnnecessaryBlock: An unnecessary Block is present. Such Blocks are often used in other languages to introduce a neâ¦
UnnecessaryParentheses: Unnecessary parentheses should be removed.
UnreachableCode: A âreturnâ, âbreakâ, âcontinueâ, or âthrowâ statement should be the last in a block. Statements aâ¦
WhileLoopsMustUseBraces: Avoid using âwhileâ 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 commâ¦
EqualComparison: Using == in condition may lead to unexpected results, as the variables are automatically casted tâ¦
InaccurateNumericLiteral: The numeric literal will have a different value at runtime, which can happen if you provide too mâ¦
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, logâ¦

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