diff --git a/core/log/console_logger_js.odin b/core/log/console_logger_js.odin
new file mode 100644
index 000000000..1e07b6cdc
--- /dev/null
+++ b/core/log/console_logger_js.odin
@@ -0,0 +1,119 @@
+#+build js
+package log
+
+import "core:fmt"
+import "core:strings"
+import "core:time"
+
+Level_Headers := [?]string{
+	 0..<10 = "[DEBUG] --- ",
+	10..<20 = "[INFO ] --- ",
+	20..<30 = "[WARN ] --- ",
+	30..<40 = "[ERROR] --- ",
+	40..<50 = "[FATAL] --- ",
+}
+
+Default_Console_Logger_Opts :: Options{
+	.Level,
+	.Short_File_Path,
+	.Line,
+	.Procedure,
+} | Full_Timestamp_Opts
+
+Console_Logger_Data :: struct {
+	ident: string,
+}
+
+create_console_logger :: proc(lowest := Level.Debug, opt := Default_Console_Logger_Opts, ident := "", allocator := context.allocator) -> Logger {
+	data := new(Console_Logger_Data, allocator)
+	data.ident = strings.clone(ident)
+	return Logger{console_logger_proc, data, lowest, opt}
+}
+
+destroy_console_logger :: proc(log: Logger, allocator := context.allocator) {
+	data := cast(^Console_Logger_Data)log.data
+	delete(data.ident)
+	free(log.data, allocator)
+}
+
+console_logger_proc :: proc(logger_data: rawptr, level: Level, text: string, options: Options, location := #caller_location) {
+	options := options
+	data := cast(^Console_Logger_Data)logger_data
+
+	backing: [1024]byte //NOTE(Hoej): 1024 might be too much for a header backing, unless somebody has really long paths.
+	buf := strings.builder_from_bytes(backing[:])
+
+	if .Level in options {
+		fmt.sbprint(&buf, Level_Headers[level])
+	}
+
+	when time.IS_SUPPORTED {
+		do_time_header(options, &buf, time.now())
+	}
+
+	do_location_header(options, &buf, location)
+
+	if data.ident != "" {
+		fmt.sbprintf(&buf, "[%s] ", data.ident)
+	}
+
+	h := fmt.stderr if level >= .Error else fmt.stdout
+
+	//TODO(Hoej): When we have better atomics and such, make this thread-safe
+	fmt.fprintf(h, "%s%s\n", strings.to_string(buf), text)
+}
+
+do_time_header :: proc(opts: Options, buf: ^strings.Builder, t: time.Time) {
+	when time.IS_SUPPORTED {
+		if Full_Timestamp_Opts & opts != nil {
+			fmt.sbprint(buf, "[")
+			y, m, d := time.date(t)
+			h, min, s := time.clock(t)
+			if .Date in opts {
+				fmt.sbprintf(buf, "%d-%02d-%02d", y, m, d)
+				if .Time in opts {
+					fmt.sbprint(buf, " ")
+				}
+			}
+			if .Time in opts { fmt.sbprintf(buf, "%02d:%02d:%02d", h, min, s) }
+			fmt.sbprint(buf, "] ")
+		}
+	}
+}
+
+do_location_header :: proc(opts: Options, buf: ^strings.Builder, location := #caller_location) {
+	if Location_Header_Opts & opts == nil {
+		return
+	}
+	fmt.sbprint(buf, "[")
+
+	file := location.file_path
+	if .Short_File_Path in opts {
+		last := 0
+		for r, i in location.file_path {
+			if r == '/' {
+				last = i+1
+			}
+		}
+		file = location.file_path[last:]
+	}
+
+	if Location_File_Opts & opts != nil {
+		fmt.sbprint(buf, file)
+	}
+	if .Line in opts {
+		if Location_File_Opts & opts != nil {
+			fmt.sbprint(buf, ":")
+		}
+		fmt.sbprint(buf, location.line)
+	}
+
+	if .Procedure in opts {
+		if (Location_File_Opts | {.Line}) & opts != nil {
+			fmt.sbprint(buf, ":")
+		}
+		fmt.sbprintf(buf, "%s()", location.procedure)
+	}
+
+	fmt.sbprint(buf, "] ")
+}
\ No newline at end of file
diff --git a/core/os/dir_js.odin b/core/os/dir_js.odin
index 8c45cf63b..cd6227507 100644
--- a/core/os/dir_js.odin
+++ b/core/os/dir_js.odin
@@ -2,6 +2,10 @@
 #+private
 package os
 
+// None of this does anything on js/wasm.
+// It's only here so importing `core:os` on wasm panics cleanly,
+// without spamming about all sorts of missing procs and types.
+
 import "base:intrinsics"
 
 Read_Directory_Iterator_Impl :: struct {
@@ -21,4 +25,4 @@ _read_directory_iterator_init :: proc(it: ^Read_Directory_Iterator, f: ^File) {
 
 _read_directory_iterator_destroy :: proc(it: ^Read_Directory_Iterator) {
 
-}
+}
\ No newline at end of file
diff --git a/core/os/env_js.odin b/core/os/env_js.odin
index 644af61bd..55ffce593 100644
--- a/core/os/env_js.odin
+++ b/core/os/env_js.odin
@@ -2,16 +2,16 @@
 #+private
 package os
 
+// None of this does anything on js/wasm.
+// It's only here so importing `core:os` on wasm panics cleanly,
+// without spamming about all sorts of missing procs and types.
+
 import "base:runtime"
 
 build_env :: proc() -> (err: Error) {
 	return
 }
 
-// delete_string_if_not_original :: proc(str: string) {
-
-// }
-
 @(require_results)
 _lookup_env_alloc :: proc(key: string, allocator: runtime.Allocator) -> (value: string, found: bool) {
 	return
@@ -39,4 +39,4 @@ _clear_env :: proc() {
 @(require_results)
 _environ :: proc(allocator: runtime.Allocator) -> (environ: []string, err: Error) {
 	return {}, .Unsupported
-}
+}
\ No newline at end of file
diff --git a/core/os/errors_js.odin b/core/os/errors_js.odin
index 34779807d..368b94d68 100644
--- a/core/os/errors_js.odin
+++ b/core/os/errors_js.odin
@@ -2,6 +2,10 @@
 #+private
 package os
 
+// None of this does anything on js/wasm.
+// It's only here so importing `core:os` on wasm panics cleanly,
+// without spamming about all sorts of missing procs and types.
+
 _Platform_Error :: enum i32 {}
 
 _error_string :: proc(errno: i32) -> string {
@@ -10,4 +14,4 @@ _error_string :: proc(errno: i32) -> string {
 
 _get_platform_error :: proc(errno: _Platform_Error) -> Error {
 	return Platform_Error(errno)
-}
+}
\ No newline at end of file
diff --git a/core/os/file_js.odin b/core/os/file_js.odin
index 5d921c9b0..aef811c11 100644
--- a/core/os/file_js.odin
+++ b/core/os/file_js.odin
@@ -2,12 +2,17 @@
 #+private
 package os
 
-import "base:runtime"
+// None of this does anything on js/wasm.
+// It's only here so importing `core:os` on wasm panics cleanly,
+// without spamming about all sorts of missing procs and types.
 
+import "base:runtime"
 import "core:io"
 import "core:time"
 
-File_Impl :: distinct rawptr
+File_Impl :: struct {
+	file: File,
+}
 
 _open :: proc(name: string, flags: File_Flags, perm: Permissions) -> (f: ^File, err: Error) {
 	return nil, .Unsupported
diff --git a/core/os/heap_js.odin b/core/os/heap_js.odin
index 5f8d9bd35..ebc8f902d 100644
--- a/core/os/heap_js.odin
+++ b/core/os/heap_js.odin
@@ -2,6 +2,10 @@
 #+private
 package os
 
+// None of this does anything on js/wasm.
+// It's only here so importing `core:os` on wasm panics cleanly,
+// without spamming about all sorts of missing procs and types.
+
 import "base:runtime"
 
-_heap_allocator_proc :: runtime.wasm_allocator_proc
+_heap_allocator_proc :: runtime.wasm_allocator_proc
\ No newline at end of file
diff --git a/core/os/path_js.odin b/core/os/path_js.odin
index 6ac845560..874b45c89 100644
--- a/core/os/path_js.odin
+++ b/core/os/path_js.odin
@@ -2,6 +2,10 @@
 #+private
 package os
 
+// None of this does anything on js/wasm.
+// It's only here so importing `core:os` on wasm panics cleanly,
+// without spamming about all sorts of missing procs and types.
+
 import "base:runtime"
 
 _Path_Separator        :: '/'
diff --git a/core/os/pipe_js.odin b/core/os/pipe_js.odin
index aea5e9a83..5e724ea00 100644
--- a/core/os/pipe_js.odin
+++ b/core/os/pipe_js.odin
@@ -2,6 +2,10 @@
 #+private
 package os
 
+// None of this does anything on js/wasm.
+// It's only here so importing `core:os` on wasm panics cleanly,
+// without spamming about all sorts of missing procs and types.
+
 _pipe :: proc() -> (r, w: ^File, err: Error) {
 	err = .Unsupported
 	return
@@ -11,4 +15,4 @@ _pipe :: proc() -> (r, w: ^File, err: Error) {
 _pipe_has_data :: proc(r: ^File) -> (ok: bool, err: Error) {
 	err = .Unsupported
 	return
-}
+}
\ No newline at end of file
diff --git a/core/os/process_js.odin b/core/os/process_js.odin
index 6283d270c..9b682da0c 100644
--- a/core/os/process_js.odin
+++ b/core/os/process_js.odin
@@ -2,6 +2,10 @@
 #+private
 package os
 
+// None of this does anything on js/wasm.
+// It's only here so importing `core:os` on wasm panics cleanly,
+// without spamming about all sorts of missing procs and types.
+
 import "base:runtime"
 import "core:time"
 
diff --git a/core/os/stat_js.odin b/core/os/stat_js.odin
index bad75486b..a304435d9 100644
--- a/core/os/stat_js.odin
+++ b/core/os/stat_js.odin
@@ -2,6 +2,10 @@
 #+private
 package os
 
+// None of this does anything on js/wasm.
+// It's only here so importing `core:os` on wasm panics cleanly,
+// without spamming about all sorts of missing procs and types.
+
 import "base:runtime"
 
 _fstat :: proc(f: ^File, allocator: runtime.Allocator) -> (fi: File_Info, err: Error) {
diff --git a/core/os/temp_file_js.odin b/core/os/temp_file_js.odin
index 32ce1c484..53158d843 100644
--- a/core/os/temp_file_js.odin
+++ b/core/os/temp_file_js.odin
@@ -2,6 +2,10 @@
 #+private
 package os
 
+// None of this does anything on js/wasm.
+// It's only here so importing `core:os` on wasm panics cleanly,
+// without spamming about all sorts of missing procs and types.
+
 import "base:runtime"
 
 _temp_dir :: proc(allocator: runtime.Allocator) -> (string, runtime.Allocator_Error) {
diff --git a/core/os/wasm.odin b/core/os/wasm.odin
new file mode 100644
index 000000000..79c00f694
--- /dev/null
+++ b/core/os/wasm.odin
@@ -0,0 +1,4 @@
+#+build js wasm32, js wasm64p32
+package os
+
+#panic("core:os is unsupported on js/wasm")
\ No newline at end of file