add exists

file.go

@@ -17,6 +17,10 @@ var fileMD string
 
 func init() {
 	obj := map[string]any{
+		"exists": func(argsIn goja.FunctionCall, vm *goja.Runtime) goja.Value {
+			args := gojs.MakeArgs(&argsIn, vm).Check(1)
+			return vm.ToValue(u.FileExists(args.Path(0)))
+		},
 		"read": func(argsIn goja.FunctionCall, vm *goja.Runtime) goja.Value {
 			args := gojs.MakeArgs(&argsIn, vm).Check(1)
 			if r, err := u.ReadFile(args.Path(0)); err == nil {

file.ts

@@ -1,6 +1,7 @@
 // just for develop
 
 export default {
+    exists,
     read,
     readBytes,
     write,
@@ -13,6 +14,7 @@ export default {
     cache
 }
 
+function exists(filename: string): boolean { return false }
 function read(filename: string): string { return '' }
 function readBytes(filename: string): any { return null }
 function write(filename: string, data: any): void { }

go.mod

@@ -3,7 +3,7 @@ module apigo.cc/gojs/file
 go 1.18
 
 require (
-	apigo.cc/gojs v0.0.1
+	apigo.cc/gojs v0.0.3
 	github.com/ssgo/u v1.7.9
 )