zig-js

I found that if I specify a return value of type for or , it does not compile and does not work. I think both Zig and JavaScript need to be modified. In the Zig code, change the return type of from to because it is probably incorrect. In the JavaScript code, when the obtained value is a boolean, write to the output pointer is probably missing, so add it.

use @memcpy instead of std.mem.copy use math.nan(T) instead of math.nan_T use const when a variable is never mutated