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Where can I find documentation on the usage of ... in functions? Examples would be useful.
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An ellipsis (plural: ellipses) is a punctuation mark consisting of three dots. Use an ellipsis when omitting a word, phrase, line, paragraph, or more from a quoted passage. Ellipses save space or remove material that is less relevant.
The three dots in JavaScript are the spread / rest operator. The spread syntax allows an expression to be expanded in places where multiple arguments are expected. The rest parameter syntax is used for functions with a variable number of arguments. The spread / rest operator for arrays was introduced in ES6.
The three dots are known as the spread operator from Typescript (also from ES7). The spread operator return all elements of an array.
three dots in javascript. The spread syntax is a new addition to the set of operators in JavaScript ES6. It takes in an iterable (e.g an array) and expands it into individual elements. The spread syntax is commonly used to make shallow copies of JS objects.
The word used to describe ... is "ellipsis." Knowing this should make searching for information about the construct easier. For example, the first hit on Google is another question on this site: How to use R's ellipsis feature when writing your own function?
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