Supported expression types


Addition	Adds numbers or concatenates strings depending on operand types.	a + b
And	Evaluates left to right and returns the first falsy operand, otherwise the last operand.	isReady && isValid
Array	Array literal node.	[a, b, c]
BigInt	BigInt literal node.	10n
BitwiseAnd	Performs bitwise AND between corresponding bits of both operands.	a & b
BitwiseLeftShift	Shifts bits of the left operand left by the number of bits from the right operand.	value << 1
BitwiseNot	Inverts all bits of the operand.	~value
BitwiseOr	Performs bitwise OR between corresponding bits of both operands.	a \| b
BitwiseRightShift	Shifts bits of the left operand right (sign-preserving) by the right operand.	value >> 1
BitwiseUnsignedRightShift	Shifts bits of the left operand right with zero-fill by the right operand.	value >>> 1
BitwiseXor	Performs bitwise XOR between corresponding bits of both operands.	a ^ b
Boolean	Boolean literal node.	true
Conditional	Evaluates a condition and returns either the consequent or alternate branch.	a > 0 ? a : 0
Division	Divides the left numeric operand by the right numeric operand.	a / b
Equality	Compares values with JavaScript loose equality semantics (type coercion allowed).	a == b
Exponentiation	Raises the left operand to the power of the right operand.	a ** 2
Function	Represents a function call expression and evaluates by invoking the resolved function with arguments.	sum(a, b)
GreaterThan	Returns true when the left operand is greater than the right operand.	a > b
GreaterThanOrEqual	Returns true when the left operand is greater than or equal to the right operand.	a >= b
Identifier	Variable or model field access.	a
In	Checks whether a property key exists in an object or its prototype chain.	'key' in obj
Index	Indexed access node.	items[0]
Inequality	Compares values with JavaScript loose inequality semantics (type coercion allowed).	a != b
Instanceof	Checks whether an object is an instance of a constructor via prototype-chain lookup.	value instanceof Date
LessThan	Returns true when the left operand is less than the right operand.	a < b
LessThanOrEqual	Returns true when the left operand is less than or equal to the right operand.	a <= b
Member	Object member access.	user.name
Multiplication	Multiplies two numeric operands and returns the product.	a * b
New	Constructs a new object instance by invoking a constructor with arguments.	new Date()
Not	Converts the operand to boolean and returns the negated value.	!isEnabled
Null	Null literal node.	null
NullishCoalescing	Returns the right operand only when the left operand is null or undefined.	name ?? 'N/A'
Number	Number literal node.	42
Object	Object literal node. In expression strings, wrap object literals in parentheses so they are parsed as an expression, not a block.	({ total: a + b })
Or	Evaluates left to right and returns the first truthy operand, otherwise the last operand.	left \|\| right
RegExp	Regular expression literal node.	/abc/i
Remainder	Returns the remainder after dividing the left operand by the right operand.	count % 2
Sequence	Comma operator sequence. It evaluates multiple expressions left-to-right and returns only the last result. Use it when you need side effects first, then a final value.	(a++, a)
Spread	Spread element/property. Valid inside array literals, object literals, and function calls. It expands iterable elements or object properties into the surrounding expression.	({ ...defaults, enabled: true })
StrictEquality	Compares values without type coercion; both type and value must match.	a === b
StrictInequality	Compares values without type coercion and returns true when type or value differs.	a !== b
String	String literal node.	'hello'
Subtraction	Subtracts the right numeric operand from the left numeric operand.	a - b
TemplateLiteral	Template string node.	`Hello ${name}`
Typeof	Returns the JavaScript runtime type name of the operand as a string.	typeof value === 'string'
UnaryNegation	Converts operand to number and returns its arithmetic negation.	-amount
UnaryPlus	Converts the operand to a number without changing its sign.	+value

ExpressionType

Description

Parameters

Return type

Supported expression types