Is there a way to document in JSDoc that my function only requires the second and third parameters when the first one is not equal to 3?
getTimeframe: function(timeframe, since, until) {
/*
* @param {Number} timeframe Can be 0, 1, 2, or 3
* @param {Number} since Required if timeframe is not 3
* @param {Number} until Required if timeframe is not 3
*/
...
}
Currently, the best approach with jsdoc 3 involves using the @also tag to signify that a function has multiple signatures. It is important to clearly outline in the description when each signature applies.
/**
* When the <code>timeframe</code> parameter is not 3...
*
* @param {number} timeframe Can be 0, 1, 2.
* @param {number} [since] blah.
* @param {number} [until] blah.
*
* @also
*
* When the <code>timeframe</code> is 3, then...
*
* @param {number} timeframe Set to 3.
*/
function getTimeframe(timeframe, since, until) {
}
This will define two distinct signatures for the getTimeframe function.
(Please note: I opt for using number over Number in cases like this because 1 instanceof Number yields false, while typeof 1 is "number" and typeof Number(1) is also "number".)
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