The unary plus (+) operator precedes its operand and evaluates to its operand but attempts to convert it into a number, if it isn't already.

The static keyword defines a static method or field for a class, or a static initialization block (see the link for more information about this usage). Static properties cannot be directly accessed on instances of the class. Instead, they're accessed on the class itself.

The encodeURI() function encodes a URI by replacing each instance of certain characters by one, two, three, or four escape sequences representing the UTF-8 encoding of the character (will only be four escape sequences for characters composed of two surrogate characters). Compared to encodeURIComponent(), this function encodes fewer characters, preserving those that are part of the URI syntax.

The exponentiation (**) operator returns the result of raising the first operand to the power of the second operand. It is equivalent to Math.pow(), except it also accepts BigInts as operands.

The font-weight attribute refers to the boldness or lightness of the glyphs used to render the text, relative to other fonts in the same font family.

The logical AND (&&) (logical conjunction) operator for a set of boolean operands will be true if and only if all the operands are true. Otherwise it will be false.

The undefined global property represents the primitive value undefined. It is one of JavaScript's primitive types.

The bitwise XOR (^) operator returns a number or BigInt whose binary representation has a 1 in each bit position for which the corresponding bits of either but not both operands are 1.

The GeneratorFunction object provides methods for generator functions. In JavaScript, every generator function is actually a GeneratorFunction object.

The left shift assignment (<<=) operator performs left shift on the two operands and assigns the result to the left operand.