On 18 Dec 2013, at 23:02, Benjamin (Inglor) Gruenbaum <ing...@gmail.com> wrote:
> If anything, I'd expect all of them to throw when passed multiple arguments
> for forward compatibility. It might be useful to check multiple values in
> contains/endsWith/startsWith or constrain it in some way.
The reason `String.prototype.{starts,ends}With` throw when passed a regular
expression is forward compatibility:
> Note 2. Throwing an exception if the first argument is a RegExp is specified
> in order to allow future editions to define extends that allow such argument
> values.
It seems that `contains` was forgotten about when
https://bugs.ecmascript.org/show_bug.cgi?id=498#c3 was fixed, so I’ve filed
https://bugs.ecmascript.org/show_bug.cgi?id=2407 asking to make
`String.prototype.contains(regex)` throw as well.
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