When coding for the cb function:
const fn1 = (
cb: (...args: [...args: any[], fn2: () => string, fn3: () => string]) => any,
...args: any[]
) => {
const fn2 = () => 'fn2'
const fn3 = () => 'fn3'
cb(...args, fn2, fn3)
}
After running tsc, an error is triggered:
A rest element must be last in a tuple type.
After realizing that I had been utilizing the global tsc throughout my project, specifically version v3.2.9, it became clear why my code was exhibiting different behaviors compared to others. Once I made the switch to the local tsc with version v4.2.3, the compilation process was successful.
As the error message suggests, make sure to move the "...(boolean | ExpressionInputType | ExpressionSpecification)[]" element to the last position
"case",
boolean | ExpressionSpecification,
...(boolean | ExpressionInputType | ExpressionSpecification)[],
ExpressionInputType | ExpressionSpecification,
ExpressionInputType | ExpressionSpecification,
]
Ensure it appears like this:
"case",
boolean | ExpressionSpecification,
ExpressionInputType | ExpressionSpecification,
ExpressionInputType | ExpressionSpecification,
...(boolean | ExpressionInputType | ExpressionSpecification)[],
]
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