diff --git a/term_unix.go b/term_unix.go
index 579ce55..44c6205 100644
--- a/term_unix.go
+++ b/term_unix.go
@@ -1,5 +1,5 @@
-//go:build !windows
-// +build !windows
+//go:build !js && !windows
+// +build !js,!windows
 
 package term
 
diff --git a/term_webassembly.go b/term_webassembly.go
new file mode 100644
index 0000000..50437a7
--- /dev/null
+++ b/term_webassembly.go
@@ -0,0 +1,76 @@
+//go:build js
+// +build js
+
+package term
+
+import (
+	"errors"
+	"io"
+	"os"
+	"syscall/js"
+)
+
+// terminalState holds the platform-specific state / console mode for the terminal.
+type terminalState struct{}
+
+// GetWinsize returns the window size based on the specified file descriptor.
+func getWinsize(fd uintptr) (*Winsize, error) {
+	window := js.Global().Get("window")
+	width := uint16(window.Get("innerWidth").Int())
+	height := uint16(window.Get("innerHeight").Int())
+	return &Winsize{Width: width, Height: height}, nil
+}
+
+func isTerminal(fd uintptr) bool {
+	return true
+}
+
+func saveState(fd uintptr) (*State, error) {
+	return &State{}, nil
+}
+
+func stdStreams() (stdIn io.ReadCloser, stdOut, stdErr io.Writer) {
+	return os.Stdin, os.Stdout, os.Stderr
+}
+
+func disableEcho(fd uintptr, state *State) error {
+	return nil
+}
+
+func setRawTerminal(fd uintptr) (*State, error) {
+	return makeRaw(fd)
+}
+
+func getFdInfo(in interface{}) (uintptr, bool) {
+	var inFd uintptr
+	var isTerminalIn bool
+	if file, ok := in.(*os.File); ok {
+		inFd = file.Fd()
+		isTerminalIn = isTerminal(inFd)
+	}
+	return inFd, isTerminalIn
+}
+
+func setWinsize(fd uintptr, ws *Winsize) error {
+	window := js.Global().Get("window")
+	window.Set("innerWidth", ws.Width)
+	window.Set("innerHeight", ws.Height)
+
+	return nil
+}
+
+func makeRaw(fd uintptr) (*State, error) {
+	oldState := State{}
+	return &oldState, nil
+}
+
+func setRawTerminalOutput(fd uintptr) (*State, error) {
+	return nil, nil
+}
+
+func restoreTerminal(fd uintptr, state *State) error {
+	if state == nil {
+		return errors.New("invalid terminal state")
+	}
+	return nil
+}
diff --git a/termios_nonbsd.go b/termios_nonbsd.go
index 88b7b21..6257d04 100644
--- a/termios_nonbsd.go
+++ b/termios_nonbsd.go
@@ -1,5 +1,5 @@
-//go:build !darwin && !freebsd && !netbsd && !openbsd && !windows
-// +build !darwin,!freebsd,!netbsd,!openbsd,!windows
+//go:build !darwin && !freebsd && !netbsd && !openbsd && !js && !windows
+// +build !darwin,!freebsd,!netbsd,!openbsd,!js,!windows
 
 package term
 
diff --git a/termios_unix.go b/termios_unix.go
index 60c8237..4df05b4 100644
--- a/termios_unix.go
+++ b/termios_unix.go
@@ -1,5 +1,5 @@
-//go:build !windows
-// +build !windows
+//go:build !js && !windows
+// +build !js,!windows
 
 package term