js-sys Array::set_length

[romamik]

Motivation

In javascript, it is possible to set the length of an array, why not allow it from the rust?

Proposed Solution

Just add this to Array externs in the js-sys crate.

#[wasm_bindgen(method, structural, setter)]
pub fn set_length(this: &Array, value: u32);

Alternatives

Now one can use Reflect::set for this, but this is ugly.

[romamik]

Also posted here: https://users.rust-lang.org/t/js-sys-set-array-length/87740