Module js_number 

ECMAScript Number::toString for binary64.

The JavaScript frontend keeps a Number literal as String(value), the text JavaScript prints, so both runtimes agree on it. Rust’s {:e} gives the shortest digits that read back as the value; ECMAScript picks the even neighbour where Rust rounds a tie away from zero.

The emitted Rust prelude (ml_number::js_number) is the same algorithm.

Functions

js_number

String(x) for a JavaScript Number x.

js_number_literal

String(Number(text)) for the text of a JavaScript numeric literal without separators or suffix: decimal, or 0x, 0o, 0b integers.