wasmlog.zig

// Log WebAssembly Messages from Zig to JavaScript Console
// From https://github.com/daneelsan/zig-wasm-logger/blob/master/JS.zig
const std = @import("std");

const Imports = struct {
    extern fn jsConsoleLogWrite(ptr: [*]const u8, len: usize) void;
    extern fn jsConsoleLogFlush() void;
};

pub const Console = struct {
    pub const Logger = struct {
        pub const Error = error{};
        pub const Writer = std.io.Writer(void, Error, write);

        fn write(_: void, bytes: []const u8) Error!usize {
            Imports.jsConsoleLogWrite(bytes.ptr, bytes.len);
            return bytes.len;
        }
    };

    const logger = Logger.Writer{ .context = {} };
    pub fn log(comptime format: []const u8, args: anytype) void {
        logger.print(format, args) catch return;
        Imports.jsConsoleLogFlush();
    }
};