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How to use Eval method of rod Package
Best Rod code snippet using rod.Eval
page_eval_test.go
Source:page_eval_test.go 
...7 "github.com/go-rod/rod/lib/proto"8 "github.com/go-rod/rod/lib/utils"9 "github.com/ysmood/gson"10)11func TestPageEvalOnNewDocument(t *testing.T) {12 g := setup(t)13 p := g.newPage()14 p.MustEvalOnNewDocument(`window.rod = 'ok'`)15 // to activate the script16 p.MustNavigate(g.blank())17 g.Eq(p.MustEval("() => rod").String(), "ok")18 g.Panic(func() {19 g.mc.stubErr(1, proto.PageAddScriptToEvaluateOnNewDocument{})20 p.MustEvalOnNewDocument(`1`)21 })22}23func TestPageEval(t *testing.T) {24 g := setup(t)25 page := g.page.MustNavigate(g.blank())26 g.Eq(3, page.MustEval(`27 (a, b) => a + b28 `, 1, 2).Int())29 g.Eq(10, page.MustEval(`(a, b, c, d) => a + b + c + d`, 1, 2, 3, 4).Int())30 g.Eq(page.MustEval(`function() {31 return 1132 }`).Int(), 11)33 g.Eq(page.MustEval(` ; () => 1; `).Int(), 1)34 // reuse obj35 obj := page.MustEvaluate(rod.Eval(`() => () => 'ok'`).ByObject())36 g.Eq("ok", page.MustEval(`f => f()`, obj).Str())37 _, err := page.Eval(`10`)38 g.Has(err.Error(), `eval js error: TypeError: 10.apply is not a function`)39 _, err = page.Eval(`() => notExist()`)40 g.Is(err, &rod.ErrEval{})41 g.Has(err.Error(), `eval js error: ReferenceError: notExist is not defined`)42}43func TestPageEvaluateRetry(t *testing.T) {44 g := setup(t)45 page := g.page.MustNavigate(g.blank())46 g.mc.stub(1, proto.RuntimeCallFunctionOn{}, func(send StubSend) (gson.JSON, error) {47 g.mc.stub(1, proto.RuntimeCallFunctionOn{}, func(send StubSend) (gson.JSON, error) {48 return gson.New(nil), cdp.ErrCtxNotFound49 })50 return gson.New(nil), cdp.ErrCtxNotFound51 })52 g.Eq(1, page.MustEval(`() => 1`).Int())53}54func TestPageUpdateJSCtxIDErr(t *testing.T) {55 g := setup(t)56 page := g.page.MustNavigate(g.srcFile("./fixtures/click-iframe.html"))57 g.mc.stub(1, proto.RuntimeCallFunctionOn{}, func(send StubSend) (gson.JSON, error) {58 g.mc.stubErr(1, proto.RuntimeEvaluate{})59 return gson.New(nil), cdp.ErrCtxNotFound60 })61 g.Err(page.Eval(`() => 1`))62 frame := page.MustElement("iframe").MustFrame()63 frame.MustReload()64 g.mc.stubErr(1, proto.DOMDescribeNode{})65 g.Err(frame.Element(`button`))66 frame.MustReload()67 g.mc.stubErr(1, proto.DOMResolveNode{})68 g.Err(frame.Element(`button`))69}70func TestPageExpose(t *testing.T) {71 g := setup(t)72 page := g.newPage(g.blank()).MustWaitLoad()73 stop := page.MustExpose("exposedFunc", func(g gson.JSON) (interface{}, error) {74 return g.Get("k").Str(), nil75 })76 utils.All(func() {77 res := page.MustEval(`() => exposedFunc({k: 'a'})`)78 g.Eq("a", res.Str())79 }, func() {80 res := page.MustEval(`() => exposedFunc({k: 'b'})`)81 g.Eq("b", res.Str())82 })()83 // survive the reload84 page.MustReload().MustWaitLoad()85 res := page.MustEval(`() => exposedFunc({k: 'ok'})`)86 g.Eq("ok", res.Str())87 stop()88 g.Panic(func() {89 stop()90 })91 g.Panic(func() {92 page.MustReload().MustWaitLoad().MustEval(`() => exposedFunc()`)93 })94 g.Panic(func() {95 g.mc.stubErr(1, proto.RuntimeCallFunctionOn{})96 page.MustExpose("exposedFunc", nil)97 })98 g.Panic(func() {99 g.mc.stubErr(1, proto.RuntimeAddBinding{})100 page.MustExpose("exposedFunc2", nil)101 })102 g.Panic(func() {103 g.mc.stubErr(1, proto.PageAddScriptToEvaluateOnNewDocument{})104 page.MustExpose("exposedFunc", nil)105 })106}107func TestObjectRelease(t *testing.T) {108 g := setup(t)109 res, err := g.page.Evaluate(rod.Eval(`() => document`).ByObject())110 g.E(err)111 g.page.MustRelease(res)112}113func TestPromiseLeak(t *testing.T) {114 g := setup(t)115 /*116 Perform a slow action then navigate the page to another url,117 we can see the slow operation will still be executed.118 */119 p := g.page.MustNavigate(g.blank())120 utils.All(func() {121 _, err := p.Eval(`() => new Promise(r => setTimeout(() => r(location.href), 1000))`)122 g.Is(err, cdp.ErrCtxDestroyed)123 }, func() {124 utils.Sleep(0.3)125 p.MustNavigate(g.blank())126 })()127}128func TestObjectLeak(t *testing.T) {129 g := setup(t)130 /*131 Seems like it won't leak132 */133 p := g.page.MustNavigate(g.blank())134 obj := p.MustEvaluate(rod.Eval("() => ({a:1})").ByObject())135 p.MustReload().MustWaitLoad()136 g.Panic(func() {137 p.MustEvaluate(rod.Eval(`obj => obj`, obj))138 })139}140func TestPageObjectErr(t *testing.T) {141 g := setup(t)142 g.Panic(func() {143 g.page.MustObjectToJSON(&proto.RuntimeRemoteObject{144 ObjectID: "not-exists",145 })146 })147 g.Panic(func() {148 g.page.MustElementFromNode(&proto.DOMNode{NodeID: -1})149 })150 g.Panic(func() {151 node := g.page.MustNavigate(g.blank()).MustElement(`body`).MustDescribe()152 g.mc.stubErr(1, proto.DOMResolveNode{})153 g.page.MustElementFromNode(node)154 })155}156func TestGetJSHelperRetry(t *testing.T) {157 g := setup(t)158 g.page.MustNavigate(g.srcFile("fixtures/click.html"))159 g.mc.stub(1, proto.RuntimeCallFunctionOn{}, func(send StubSend) (gson.JSON, error) {160 return gson.JSON{}, cdp.ErrCtxNotFound161 })162 g.page.MustElements("button")163}164func TestConcurrentEval(t *testing.T) {165 g := setup(t)166 p := g.page.MustNavigate(g.blank())167 list := make(chan int, 2)168 start := time.Now()169 utils.All(func() {170 list <- p.MustEval(`() => new Promise(r => setTimeout(r, 2000, 2))`).Int()171 }, func() {172 list <- p.MustEval(`() => new Promise(r => setTimeout(r, 1000, 1))`).Int()173 })()174 duration := time.Since(start)175 g.Gt(duration, 1000*time.Millisecond)176 g.Lt(duration, 3000*time.Millisecond)177 g.Eq([]int{<-list, <-list}, []int{1, 2})178}179func TestPageSlowRender(t *testing.T) {180 g := setup(t)181 p := g.page.MustNavigate(g.srcFile("./fixtures/slow-render.html"))182 g.Eq(p.MustElement("div").MustText(), "ok")183}184func TestPageIframeReload(t *testing.T) {185 g := setup(t)186 p := g.page.MustNavigate(g.srcFile("./fixtures/click-iframe.html"))187 frame := p.MustElement("iframe").MustFrame()188 btn := frame.MustElement("button")189 g.Eq(btn.MustText(), "click me")190 frame.MustReload()191 btn = frame.MustElement("button")192 g.Eq(btn.MustText(), "click me")193 g.Has(*p.MustElement("iframe").MustAttribute("src"), "click.html")194}195func TestPageObjCrossNavigation(t *testing.T) {196 g := setup(t)197 p := g.page.MustNavigate(g.blank())198 obj := p.MustEvaluate(rod.Eval(`() => ({})`).ByObject())199 g.page.MustNavigate(g.blank())200 _, err := p.Evaluate(rod.Eval(`() => 1`).This(obj))201 g.Is(err, &rod.ErrObjectNotFound{})202 g.Has(err.Error(), "cannot find object: {\"type\":\"object\"")203}204func TestEnsureJSHelperErr(t *testing.T) {205 g := setup(t)206 p := g.page.MustNavigate(g.blank())207 g.mc.stubErr(2, proto.RuntimeCallFunctionOn{})208 g.Err(p.Elements(`button`))209}210func TestEvalOptionsString(t *testing.T) {211 g := setup(t)212 p := g.page.MustNavigate(g.srcFile("fixtures/click.html"))213 el := p.MustElement("button")214 g.Eq(rod.Eval(`() => this.parentElement`).This(el.Object).String(), "() => this.parentElement() button")215}216func TestEvalObjectReferenceChainIsTooLong(t *testing.T) {217 g := setup(t)218 p := g.page.MustNavigate(g.blank())219 obj, err := p.Evaluate(&rod.EvalOptions{220 JS: `() => {221 let a = {b: 1}222 a.c = a223 return a224 }`,225 })226 g.E(err)227 _, err = p.Eval(`a => a`, obj)228 g.Eq(err.Error(), "{-32000 Object reference chain is too long }")229 val := p.MustEval(`a => a.c.c.c.c.b`, obj)230 g.Eq(val.Int(), 1)231}...
Eval
Using AI Code Generation
1import (2func main() {3 browser := rod.New().MustConnect()4 defer browser.MustClose()5 page.MustEval(`() => {6 document.querySelector('input[name="q"]').value = "rod"7 }`)8 page.MustElement("input[name=q]").MustInput("rod")9 page.MustElement("input[name=q]").MustPress(proto.InputKeyEvent{10 })11 fmt.Println(page.MustInfo().URL)12}
Eval
Using AI Code Generation
1import (2func main() {3 fmt.Print("Enter a number: ")4 fmt.Scanf("%f", &input)5 output := math.Sqrt(input)6 fmt.Println(output)7}
Eval
Using AI Code Generation
1import (2func main() {3 l := launcher.New().Headless(false)4 defer l.Cleanup()5 browser := rod.New().ControlURL(l).MustConnect()6 res, err := page.Eval(`() => {7 return {8 }9 }`)10 if err != nil {11 panic(err)12 }13 fmt.Println(res.Get("foo").Int())14 fmt.Println(res.Get("bar").String())15}16import (17func main() {18 l := launcher.New().Headless(false)19 defer l.Cleanup()20 browser := rod.New().ControlURL(l).MustConnect()
Eval
Using AI Code Generation
1import (2func main() {3 page.MustEval("document.title", &title)4 fmt.Println(title)5}6import (7func main() {8 page.MustElement("input[name='q']").MustInput("rod")9}10import (11func main() {12 page.MustElements("input[name='q']").MustInput("rod")13}14import (15func main() {16 page.MustElementR("input[name='q']").MustInput("rod")17}18import (19func main() {20 page.MustElementsR("input[name='q']").MustInput("rod")21}22import (23func main() {
Eval
Using AI Code Generation
1import (2type rod struct {3}4func (r rod) Eval() {5 fmt.Println("Eval method of rod class")6}7func main() {8 r := rod{length: 5}9 x := reflect.ValueOf(r)10 fmt.Println("Type of x is:", x.Type())11 fmt.Println("Kind of x is:", x.Kind())12 fmt.Println("Value of x is:", x)13 fmt.Println("Is x a struct?", x.Kind() == reflect.Struct)14 fmt.Println("Is x a pointer?", x.Kind() == reflect.Ptr)15 fmt.Println("Is x a method?", x.Kind() == reflect.Func)16 fmt.Println("Is x a int?", x.Kind() == reflect.Int)17 fmt.Println("Is x a string?", x.Kind() == reflect.String)18}19Value of x is: {5}
Eval
Using AI Code Generation
1import (2func main() {3 router := mux.NewRouter()4 router.HandleFunc("/api/rod", GetRod).Methods("GET")5 log.Fatal(http.ListenAndServe(":8080", router))6}7func GetRod(w http.ResponseWriter, r *http.Request) {8 rod := Rod{1, 2, 3}9 fmt.Println(rod)10 fmt.Println(rod.Eval())11}12{1 2 3}13import (14func main() {15 router := mux.NewRouter()16 router.HandleFunc("/api/rod", GetRod).Methods("GET")17 log.Fatal(http.ListenAndServe(":8080", router))18}19func GetRod(w http.ResponseWriter, r *http.Request) {20 rod := Rod{1, 2, 3}21 fmt.Println(rod)22 fmt.Println(rod.Eval())23}24{1 2 3}25import (26func main() {27 router := mux.NewRouter()28 router.HandleFunc("/api/rod", GetRod).Methods("GET")29 log.Fatal(http.ListenAndServe(":8080", router))30}31func GetRod(w http.ResponseWriter, r *http.Request) {32 rod := Rod{1, 2, 3}33 fmt.Println(rod)34 fmt.Println(rod.Eval())35}36{1 2 3}37import (38func main() {39 router := mux.NewRouter()40 router.HandleFunc("/api/rod", GetRod).Methods("GET")41 log.Fatal(http.ListenAndServe(":8080", router))42}43func GetRod(w http.ResponseWriter, r *http.Request) {44 rod := Rod{1, 2, 3}
Eval
Using AI Code Generation
1import (2func main() {3 fmt.Println("Hello, playground")4 fmt.Println(math.E)5}6import (7func main() {8 fmt.Println("Hello, playground")9 fmt.Println(math.E)10}11import (12func main() {13 fmt.Println("Hello, playground")14 fmt.Println(math.E)15}16import (17func main() {18 fmt.Println("Hello, playground")19 fmt.Println(math.E)20}21import (22func main() {23 fmt.Println("Hello, playground")24 fmt.Println(math.E)25}26import (27func main() {28 fmt.Println("Hello, playground")29 fmt.Println(math.E)30}31import (32func main() {33 fmt.Println("Hello, playground")34 fmt.Println(math.E)35}36import (37func main() {38 fmt.Println("Hello, playground")39 fmt.Println(math.E)40}41import (42func main() {43 fmt.Println("Hello, playground")44 fmt.Println(math.E)45}
Eval
Using AI Code Generation
1import (2func main() {3 fmt.Println("a = ", a, "b = ", b, "c = ", c)4}5import (6func main() {7 fmt.Println("a = ", a, "b = ", b, "c = ", c)8}9import (10func main() {11 fmt.Println("a = ", a, "b = ", b, "c = ", c)12}
Eval
Using AI Code Generation
1import (2func main() {3 r := new(rod)4 area := r.Eval(2)5 fmt.Println(area)6}7type rod struct {8}9func (r *rod) Eval(radius float64) float
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Most used method in
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- Incognito
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