diff --git a/.drone.yml b/.drone.yml
index 21ac809..696ba9c 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -16,7 +16,7 @@ steps:
       - golangci-lint run
 
   - name: test
-    image: "golang:1.16.5-alpine3.13"
+    image: "golang:alpine3.15"
     commands:
       - apk add --no-cache wget
       - wget https://taskfile.dev/install.sh
diff --git a/Taskfile.yml b/Taskfile.yml
index 5c69d54..6a42ea1 100644
--- a/Taskfile.yml
+++ b/Taskfile.yml
@@ -18,7 +18,7 @@ tasks:
       GOOS: js
       GOARCH: wasm
     cmds:
-      - go test -exec={{.GOPATH}}/bin/wasmbrowsertest ./web/
+      - go test -exec={{.GOPATH}}/bin/wasmbrowsertest -buildvcs=false ./web/
 
   test:examples:
     env:
@@ -27,7 +27,7 @@ tasks:
     cmds:
       - rm -rf /tmp/gweb-bin
       - mkdir -p /tmp/gweb-bin/
-      - go build -o /tmp/gweb-bin/ ./...
+      - go build -buildvcs=false -o /tmp/gweb-bin/ ./...
 
   test:
     desc: "run go test for the library and examples"
diff --git a/audio/media_stream.go b/audio/media_stream.go
index a6a24f9..def1033 100644
--- a/audio/media_stream.go
+++ b/audio/media_stream.go
@@ -6,6 +6,11 @@ type MediaStream struct {
 	js.Value
 }
 
+// Casts audio.MediaStream to js.Value
+func (stream MediaStream) JSValue() js.Value {
+	return stream.Value
+}
+
 // PROPERTIES
 
 // https://developer.mozilla.org/en-US/docs/Web/API/MediaStream/active
diff --git a/audio/value.go b/audio/value.go
index af5e188..962f571 100644
--- a/audio/value.go
+++ b/audio/value.go
@@ -11,7 +11,7 @@ type Value struct {
 
 // overloaded methods
 
-func (v Value) Call(method string, args ...interface{}) Value {
+func (v Value) Call(method string, args ...any) Value {
 	result := v.Value.Call(method, args...)
 	return Value{Value: result}
 }
@@ -21,7 +21,7 @@ func (v Value) Get(property string) Value {
 	return Value{Value: result}
 }
 
-func (v Value) New(args ...interface{}) Value {
+func (v Value) New(args ...any) Value {
 	result := v.Value.New(args...)
 	return Value{Value: result}
 }
diff --git a/go.mod b/go.mod
index cc219a5..afad367 100644
--- a/go.mod
+++ b/go.mod
@@ -1,12 +1,27 @@
 module github.com/life4/gweb
 
-go 1.13
+go 1.18
 
 require (
-	github.com/agnivade/wasmbrowsertest v0.3.5 // indirect
+	github.com/agnivade/wasmbrowsertest v0.4.0
+	github.com/stretchr/testify v1.7.0
+)
+
+require (
+	github.com/chromedp/cdproto v0.0.0-20211002082225-0242b9dca9f4 // indirect
+	github.com/chromedp/chromedp v0.7.4 // indirect
+	github.com/chromedp/sysutil v1.0.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/go-interpreter/wagon v0.6.0 // indirect
+	github.com/gobwas/httphead v0.1.0 // indirect
+	github.com/gobwas/pool v0.2.1 // indirect
+	github.com/gobwas/ws v1.1.0 // indirect
+	github.com/google/pprof v0.0.0-20211001005136-7fe48b4c820b // indirect
+	github.com/josharian/intern v1.0.0 // indirect
 	github.com/kr/text v0.2.0 // indirect
-	github.com/stretchr/testify v1.7.0
+	github.com/mailru/easyjson v0.7.7 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	golang.org/x/sys v0.0.0-20211003122950-b1ebd4e1001c // indirect
 	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
 	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
 )
diff --git a/go.sum b/go.sum
index eba435e..e2c4b33 100644
--- a/go.sum
+++ b/go.sum
@@ -1,52 +1,57 @@
-github.com/agnivade/wasmbrowsertest v0.3.5 h1:U8ICR7Xa3LBGQb57HtbbXf5KAMjQhiWrCWlr1kD77Cw=
-github.com/agnivade/wasmbrowsertest v0.3.5/go.mod h1:zQt6ZTdl338xxRaMW395qccVE2eQm0SjC/SDz0mPWQI=
-github.com/chromedp/cdproto v0.0.0-20190614062957-d6d2f92b486d/go.mod h1:S8mB5wY3vV+vRIzf39xDXsw3XKYewW9X6rW2aEmkrSw=
-github.com/chromedp/cdproto v0.0.0-20190621002710-8cbd498dd7a0 h1:4Wocv9f+KWF4GtZudyrn8JSBTgHQbGp86mcsoH7j1iQ=
-github.com/chromedp/cdproto v0.0.0-20190621002710-8cbd498dd7a0/go.mod h1:S8mB5wY3vV+vRIzf39xDXsw3XKYewW9X6rW2aEmkrSw=
-github.com/chromedp/chromedp v0.3.1-0.20190619195644-fd957a4d2901 h1:tg66ykM8VYqP9k4DFQwSMnYv84HNTruF+GR6kefFNg4=
-github.com/chromedp/chromedp v0.3.1-0.20190619195644-fd957a4d2901/go.mod h1:mJdvfrVn594N9tfiPecUidF6W5jPRKHymqHfzbobPsM=
-github.com/creack/pty v1.1.9 h1:uDmaGzcdjhF4i/plgjmEsriH11Y0o7RKapEf/LDaM3w=
+github.com/agnivade/wasmbrowsertest v0.4.0 h1:B2P8ZYqAmD3nmLkJaxuUFiv25J+2XUkOmhAJyfV0X0A=
+github.com/agnivade/wasmbrowsertest v0.4.0/go.mod h1:baeI8tnJ+NNeVbOfF1/GaRmg6qiJOJ6BCnUASRFAtsk=
+github.com/chromedp/cdproto v0.0.0-20210713064928-7d28b402946a/go.mod h1:At5TxYYdxkbQL0TSefRjhLE3Q0lgvqKKMSFUglJ7i1U=
+github.com/chromedp/cdproto v0.0.0-20211002082225-0242b9dca9f4 h1:5s+L1cvXzolXsfAChfBr6KmD86rJR5BTeJnz36vQCmo=
+github.com/chromedp/cdproto v0.0.0-20211002082225-0242b9dca9f4/go.mod h1:At5TxYYdxkbQL0TSefRjhLE3Q0lgvqKKMSFUglJ7i1U=
+github.com/chromedp/chromedp v0.7.4 h1:U+0d3WbB/Oj4mDuBOI0P7S3PJEued5UZIl5AJ3QulwU=
+github.com/chromedp/chromedp v0.7.4/go.mod h1:dBj+SXuQHznp6ZPwZeDDEBZKwclUwDLbZ0hjMialMYs=
+github.com/chromedp/sysutil v1.0.0 h1:+ZxhTpfpZlmchB58ih/LBHX52ky7w2VhQVKQMucy3Ic=
+github.com/chromedp/sysutil v1.0.0/go.mod h1:kgWmDdq8fTzXYcKIBqIYvRRTnYb9aNS9moAV0xufSww=
+github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
+github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
+github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/edsrzf/mmap-go v1.0.0 h1:CEBF7HpRnUCSJgGUb5h1Gm7e3VkmVDrR8lvWVLtrOFw=
 github.com/edsrzf/mmap-go v1.0.0/go.mod h1:YO35OhQPt3KJa3ryjFM5Bs14WD66h8eGKpfaBNrHW5M=
-github.com/go-interpreter/wagon v0.5.1-0.20190713202023-55a163980b6c h1:DLLAPVFrk9iNzljMKF512CUmrFImQ6WU3sDiUS4IRqk=
-github.com/go-interpreter/wagon v0.5.1-0.20190713202023-55a163980b6c/go.mod h1:5+b/MBYkclRZngKF5s6qrgWxSLgE9F5dFdO1hAueZLc=
-github.com/gobwas/httphead v0.0.0-20180130184737-2c6c146eadee h1:s+21KNqlpePfkah2I+gwHF8xmJWRjooY+5248k6m4A0=
-github.com/gobwas/httphead v0.0.0-20180130184737-2c6c146eadee/go.mod h1:L0fX3K22YWvt/FAX9NnzrNzcI4wNYi9Yku4O0LKYflo=
-github.com/gobwas/pool v0.2.0 h1:QEmUOlnSjWtnpRGHF3SauEiOsy82Cup83Vf2LcMlnc8=
-github.com/gobwas/pool v0.2.0/go.mod h1:q8bcK0KcYlCgd9e7WYLm9LpyS+YeLd8JVDW6WezmKEw=
-github.com/gobwas/ws v1.0.2 h1:CoAavW/wd/kulfZmSIBt6p24n4j7tHgNVCjsfHVNUbo=
-github.com/gobwas/ws v1.0.2/go.mod h1:szmBTxLgaFppYjEmNtny/v3w89xOydFnnZMcgRRu/EM=
-github.com/google/pprof v0.0.0-20190515194954-54271f7e092f h1:Jnx61latede7zDD3DiiP4gmNz33uK0U5HDUaF0a/HVQ=
-github.com/google/pprof v0.0.0-20190515194954-54271f7e092f/go.mod h1:zfwlbNMJ+OItoe0UupaVj+oy1omPYYDuagoSzA8v9mc=
-github.com/knq/sysutil v0.0.0-20181215143952-f05b59f0f307 h1:vl4eIlySbjertFaNwiMjXsGrFVK25aOWLq7n+3gh2ls=
-github.com/knq/sysutil v0.0.0-20181215143952-f05b59f0f307/go.mod h1:BjPj+aVjl9FW/cCGiF3nGh5v+9Gd3VCgBQbod/GlMaQ=
+github.com/go-interpreter/wagon v0.6.0 h1:BBxDxjiJiHgw9EdkYXAWs8NHhwnazZ5P2EWBW5hFNWw=
+github.com/go-interpreter/wagon v0.6.0/go.mod h1:5+b/MBYkclRZngKF5s6qrgWxSLgE9F5dFdO1hAueZLc=
+github.com/gobwas/httphead v0.1.0 h1:exrUm0f4YX0L7EBwZHuCF4GDp8aJfVeBrlLQrs6NqWU=
+github.com/gobwas/httphead v0.1.0/go.mod h1:O/RXo79gxV8G+RqlR/otEwx4Q36zl9rqC5u12GKvMCM=
+github.com/gobwas/pool v0.2.1 h1:xfeeEhW7pwmX8nuLVlqbzVc7udMDrwetjEv+TZIz1og=
+github.com/gobwas/pool v0.2.1/go.mod h1:q8bcK0KcYlCgd9e7WYLm9LpyS+YeLd8JVDW6WezmKEw=
+github.com/gobwas/ws v1.1.0 h1:7RFti/xnNkMJnrK7D1yQ/iCIB5OrrY/54/H930kIbHA=
+github.com/gobwas/ws v1.1.0/go.mod h1:nzvNcVha5eUziGrbxFCo6qFIojQHjJV5cLYIbezhfL0=
+github.com/google/pprof v0.0.0-20211001005136-7fe48b4c820b h1:GX4+fGLMW5XTmDXB3R6UhTwZIYqgAOdA19+Ea0+3CU4=
+github.com/google/pprof v0.0.0-20211001005136-7fe48b4c820b/go.mod h1:kpwsk12EmLew5upagYY7GY0pfYCcupk39gWOCRROcvE=
+github.com/ianlancetaylor/demangle v0.0.0-20200824232613-28f6c0f3b639/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
+github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
+github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
 github.com/kr/pretty v0.2.1 h1:Fmg33tUaq4/8ym9TJN1x7sLJnHVwhP33CNkpYV/7rwI=
 github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
-github.com/kr/pty v1.1.1 h1:VkoXIwSboBpnk99O/KFauAEILuNHv5DVFKZMBN/gUgw=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
-github.com/mailru/easyjson v0.0.0-20190403194419-1ea4449da983/go.mod h1:C1wdFJiN94OJF2b5HbByQZoLdCWB1Yqtg26g4irojpc=
-github.com/mailru/easyjson v0.0.0-20190614124828-94de47d64c63/go.mod h1:C1wdFJiN94OJF2b5HbByQZoLdCWB1Yqtg26g4irojpc=
-github.com/mailru/easyjson v0.0.0-20190620125010-da37f6c1e481 h1:IaSjLMT6WvkoZZjspGxy3rdaTEmWLoRm49WbtVUi9sA=
-github.com/mailru/easyjson v0.0.0-20190620125010-da37f6c1e481/go.mod h1:C1wdFJiN94OJF2b5HbByQZoLdCWB1Yqtg26g4irojpc=
+github.com/mailru/easyjson v0.7.7 h1:UGYAvKxe3sBsEDzO8ZeWOSlIQfWFlxbzLZe7hwFURr0=
+github.com/mailru/easyjson v0.7.7/go.mod h1:xzfreul335JAWq5oZzymOObrkdz5UnU4kGfJJLY9Nlc=
+github.com/orisano/pixelmatch v0.0.0-20210112091706-4fa4c7ba91d5 h1:1SoBaSPudixRecmlHXb/GxmaD3fLMtHIDN13QujwQuc=
+github.com/orisano/pixelmatch v0.0.0-20210112091706-4fa4c7ba91d5/go.mod h1:nZgzbfBr3hhjoZnS66nKrHmduYNpc34ny7RK4z5/HM0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/objx v0.1.0 h1:4G4v2dO3VZwixGIRoQ5Lfboy6nUhCyYzaqnIAPPhYs4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/twitchyliquid64/golang-asm v0.0.0-20190126203739-365674df15fc h1:RTUQlKzoZZVG3umWNzOYeFecQLIh+dbxXvJp1zPQJTI=
 github.com/twitchyliquid64/golang-asm v0.0.0-20190126203739-365674df15fc/go.mod h1:NoCfSFWosfqMqmmD7hApkirIK9ozpHjxRnRxs1l413A=
 golang.org/x/sys v0.0.0-20190306220234-b354f8bf4d9e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190618155005-516e3c20635f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20190712062909-fae7ac547cb7 h1:LepdCS8Gf/MVejFIt8lsiexZATdoGVyp5bcyS+rYoUI=
-golang.org/x/sys v0.0.0-20190712062909-fae7ac547cb7/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191204072324-ce4227a45e2e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20201207223542-d4d67f95c62d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210525143221-35b2ab0089ea/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20211003122950-b1ebd4e1001c h1:EyJTLQbOxvk8V6oDdD8ILR1BOs3nEJXThD6aqsiPNkM=
+golang.org/x/sys v0.0.0-20211003122950-b1ebd4e1001c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
diff --git a/tools.go b/tools.go
new file mode 100644
index 0000000..34a0133
--- /dev/null
+++ b/tools.go
@@ -0,0 +1,8 @@
+//go:build tools
+// +build tools
+
+package main
+
+import (
+	_ "github.com/agnivade/wasmbrowsertest"
+)
diff --git a/web/console.go b/web/console.go
index 71f322e..2e8c3a9 100644
--- a/web/console.go
+++ b/web/console.go
@@ -7,36 +7,36 @@ type Console struct {
 
 // LOGGING
 
-func (console Console) log(fname, format string, args []interface{}) {
+func (console Console) log(fname, format string, args []any) {
 	if format == "" {
 		console.Call(fname, args...)
 	} else {
-		console.Call(fname, append([]interface{}{format}, args...)...)
+		console.Call(fname, append([]any{format}, args...)...)
 	}
 }
 
 // https://developer.mozilla.org/en-US/docs/Web/API/Console/log
-func (console Console) Log(format string, args ...interface{}) {
+func (console Console) Log(format string, args ...any) {
 	console.log("log", format, args)
 }
 
 // https://developer.mozilla.org/en-US/docs/Web/API/Console/debug
-func (console Console) Debug(format string, args ...interface{}) {
+func (console Console) Debug(format string, args ...any) {
 	console.log("debug", format, args)
 }
 
 // https://developer.mozilla.org/en-US/docs/Web/API/Console/info
-func (console Console) Info(format string, args ...interface{}) {
+func (console Console) Info(format string, args ...any) {
 	console.log("info", format, args)
 }
 
 // https://developer.mozilla.org/en-US/docs/Web/API/Console/warn
-func (console Console) Warning(format string, args ...interface{}) {
+func (console Console) Warning(format string, args ...any) {
 	console.log("warn", format, args)
 }
 
 // https://developer.mozilla.org/en-US/docs/Web/API/Console/error
-func (console Console) Error(format string, args ...interface{}) {
+func (console Console) Error(format string, args ...any) {
 	console.log("error", format, args)
 }
 
@@ -106,6 +106,6 @@ func (console Console) TimeLog(label string) {
 }
 
 // https://developer.mozilla.org/en-US/docs/Web/API/Console/trace
-func (console Console) Trace(args ...interface{}) {
+func (console Console) Trace(args ...any) {
 	console.Call("trace", args...)
 }
diff --git a/web/element.go b/web/element.go
index aa58905..c5266a3 100644
--- a/web/element.go
+++ b/web/element.go
@@ -271,9 +271,9 @@ func (cls Class) Append(names ...string) {
 	if len(names) == 0 {
 		return
 	}
-	casted := make([]interface{}, len(names))
+	casted := make([]any, len(names))
 	for i, name := range names {
-		casted[i] = interface{}(name)
+		casted[i] = any(name)
 	}
 	cls.value.Get("classList").Call("add", casted...)
 }
@@ -283,9 +283,9 @@ func (cls Class) Remove(names ...string) {
 	if len(names) == 0 {
 		return
 	}
-	casted := make([]interface{}, len(names))
+	casted := make([]any, len(names))
 	for i, name := range names {
-		casted[i] = interface{}(name)
+		casted[i] = any(name)
 	}
 	cls.value.Get("classList").Call("remove", casted...)
 }
diff --git a/web/event_target.go b/web/event_target.go
index be677b9..f771df8 100644
--- a/web/event_target.go
+++ b/web/event_target.go
@@ -12,7 +12,7 @@ type EventTarget struct {
 // Listen registers callback for the given event.
 // https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener
 func (target EventTarget) Listen(event EventType, handler func(event Event)) {
-	wrapped := func(this js.Value, args []js.Value) interface{} {
+	wrapped := func(this js.Value, args []js.Value) any {
 		v := Value{Value: args[0]}
 		handler(v.Event())
 		return nil
diff --git a/web/http_request.go b/web/http_request.go
index 4ef6c18..5fb808e 100644
--- a/web/http_request.go
+++ b/web/http_request.go
@@ -22,7 +22,7 @@ func (req HTTPRequest) Send(body []byte) HTTPResponse {
 	wg := sync.WaitGroup{}
 	wg.Add(1)
 	// https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/onreadystatechange
-	req.Set("onreadystatechange", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
+	req.Set("onreadystatechange", js.FuncOf(func(this js.Value, args []js.Value) any {
 		state := req.Get("readyState").Int()
 		if state == 4 || state == 0 {
 			wg.Done()
diff --git a/web/http_request_test.go b/web/http_request_test.go
index bd78f5e..10e5c8a 100644
--- a/web/http_request_test.go
+++ b/web/http_request_test.go
@@ -14,7 +14,7 @@ func TestHTTPRequest_GET(t *testing.T) {
 	is.Equal(resp.StatusCode(), 200)
 	is.Equal(resp.Status(), "")
 	is.Equal(resp.Headers().Get("Content-Type"), "application/json")
-	is.Equal(resp.Headers().Values(), []string{"content-length: 619", "content-type: application/json"})
+	is.Equal(resp.Headers().Values(), []string{"content-length: 701", "content-type: application/json"})
 }
 
 func TestHTTPRequest_POST(t *testing.T) {
@@ -24,7 +24,7 @@ func TestHTTPRequest_POST(t *testing.T) {
 	is.Equal(resp.StatusCode(), 200)
 	is.Equal(resp.Status(), "")
 	is.Equal(resp.Headers().Get("Content-Type"), "application/json")
-	is.Equal(resp.Headers().Values(), []string{"content-length: 723", "content-type: application/json"})
+	is.Equal(resp.Headers().Values(), []string{"content-length: 805", "content-type: application/json"})
 
 	data := struct {
 		Data string `json:"data"`
diff --git a/web/media_devices.go b/web/media_devices.go
index 8e307f9..6aa1b79 100644
--- a/web/media_devices.go
+++ b/web/media_devices.go
@@ -6,12 +6,12 @@ type MediaDevices struct {
 
 // https://developer.mozilla.org/en-US/docs/Web/API/MediaDevices/getUserMedia
 func (devices MediaDevices) Audio() Promise {
-	params := map[string]interface{}{"audio": true}
+	params := map[string]any{"audio": true}
 	return devices.Call("getUserMedia", params).Promise()
 }
 
 // https://developer.mozilla.org/en-US/docs/Web/API/MediaDevices/getUserMedia
 func (devices MediaDevices) Video() Promise {
-	params := map[string]interface{}{"video": true}
+	params := map[string]any{"video": true}
 	return devices.Call("getUserMedia", params).Promise()
 }
diff --git a/web/promise.go b/web/promise.go
index 2c12e33..113aa85 100644
--- a/web/promise.go
+++ b/web/promise.go
@@ -12,7 +12,7 @@ type Promise struct {
 
 // Register callback for error handling
 func (promise Promise) Catch(handler func(reason js.Value)) {
-	wrapper := func(then js.Value, args []js.Value) interface{} {
+	wrapper := func(then js.Value, args []js.Value) any {
 		handler(args[0])
 		return nil
 	}
@@ -21,7 +21,7 @@ func (promise Promise) Catch(handler func(reason js.Value)) {
 
 // Register callback for sucsessful result handling
 func (promise Promise) Then(handler func(value js.Value)) {
-	wrapper := func(then js.Value, args []js.Value) interface{} {
+	wrapper := func(then js.Value, args []js.Value) any {
 		handler(args[0])
 		return nil
 	}
diff --git a/web/value.go b/web/value.go
index 62ba58a..16b4663 100644
--- a/web/value.go
+++ b/web/value.go
@@ -14,8 +14,8 @@ type Value struct {
 // overloaded methods
 
 // Call calls the given method of the object.
-func (v Value) Call(method string, args ...interface{}) Value {
-	result := v.Value.Call(method, args...)
+func (v Value) Call(method string, args ...any) Value {
+	result := v.Value.Call(method, unwrapValues(args)...)
 	return Value{Value: result}
 }
 
@@ -26,13 +26,18 @@ func (v Value) Get(property string) Value {
 }
 
 // Creates new instance of the JS class.
-func (v Value) New(args ...interface{}) Value {
-	result := v.Value.New(args...)
+func (v Value) New(args ...any) Value {
+	result := v.Value.New(unwrapValues(args)...)
 	return Value{Value: result}
 }
 
 // new methods
 
+// Casts web.Value to js.Value
+func (v Value) JSValue() js.Value {
+	return v.Value
+}
+
 // Represents the current value into Canvas
 func (v Value) Canvas() Canvas {
 	return Canvas{HTMLElement: v.HTMLElement()}
@@ -109,3 +114,16 @@ func (v Value) OptionalString() string {
 		panic("bad type")
 	}
 }
+
+func unwrapValues(args []any) []any {
+	values := make([]any, len(args))
+	for i, arg := range args {
+		switch arg := arg.(type) {
+		case Value:
+			values[i] = arg.Value
+		default:
+			values[i] = arg
+		}
+	}
+	return values
+}
diff --git a/web/window.go b/web/window.go
index 886443b..761c886 100644
--- a/web/window.go
+++ b/web/window.go
@@ -144,7 +144,7 @@ func (window Window) SetScrollY(pixels int) {
 
 // https://developer.mozilla.org/en-US/docs/Web/API/Window/scrollY
 func (window Window) RequestAnimationFrame(handler func(), recursive bool) {
-	wrapped := func(this js.Value, args []js.Value) interface{} {
+	wrapped := func(this js.Value, args []js.Value) any {
 		handler()
 		if recursive {
 			window.RequestAnimationFrame(handler, true)