Join the 1-day Testing & QA Summit featuring 15+ Expert Speakers.Register for FREE! Join TestMu Conference

How to use evalHelper method of rod Package

Best Rod code snippet using rod.evalHelper

dev_helpers.go

Source:dev_helpers.go

...83	time.Sleep(b.slowMotion)84}85// ExposeHelpers helper functions to page's js context so that we can use the Devtools' console to debug them.86func (p *Page) ExposeHelpers(list ...*js.Function) {87	p.MustEvaluate(evalHelper(&js.Function{88		Name:         "_" + utils.RandString(8), // use a random name so it won't hit the cache89		Definition:   "() => { window.rod = functions }",90		Dependencies: list,91	}))92}93// Overlay a rectangle on the main frame with specified message94func (p *Page) Overlay(left, top, width, height float64, msg string) (remove func()) {95	id := utils.RandString(8)96	_, _ = p.root.Evaluate(evalHelper(js.Overlay,97		id,98		left,99		top,100		width,101		height,102		msg,103	).ByPromise())104	remove = func() {105		_, _ = p.root.Evaluate(evalHelper(js.RemoveOverlay, id))106	}107	return108}109func (p *Page) tryTrace(typ TraceType, msg ...interface{}) func() {110	if !p.browser.trace {111		return func() {}112	}113	msg = append([]interface{}{typ}, msg...)114	msg = append(msg, p)115	p.browser.logger.Println(msg...)116	return p.Overlay(0, 0, 500, 0, fmt.Sprint(msg))117}118func (p *Page) tryTraceQuery(opts *EvalOptions) func() {119	if !p.browser.trace {120		return func() {}121	}122	p.browser.logger.Println(TraceTypeQuery, opts, p)123	msg := fmt.Sprintf("<code>%s</code>", html.EscapeString(opts.String()))124	return p.Overlay(0, 0, 500, 0, msg)125}126func (p *Page) tryTraceReq(includes, excludes []string) func(map[proto.NetworkRequestID]string) {127	if !p.browser.trace {128		return func(map[proto.NetworkRequestID]string) {}129	}130	msg := map[string][]string{131		"includes": includes,132		"excludes": excludes,133	}134	p.browser.logger.Println(TraceTypeWaitRequestsIdle, msg, p)135	cleanup := p.Overlay(0, 0, 500, 0, utils.MustToJSON(msg))136	ch := make(chan map[string]string)137	update := func(list map[proto.NetworkRequestID]string) {138		clone := map[string]string{}139		for k, v := range list {140			clone[string(k)] = v141		}142		ch <- clone143	}144	go func() {145		var waitlist map[string]string146		t := time.NewTicker(time.Second)147		for {148			select {149			case <-p.ctx.Done():150				t.Stop()151				cleanup()152				return153			case waitlist = <-ch:154			case <-t.C:155				p.browser.logger.Println(TraceTypeWaitRequests, p, waitlist)156			}157		}158	}()159	return update160}161// Overlay msg on the element162func (el *Element) Overlay(msg string) (removeOverlay func()) {163	id := utils.RandString(8)164	_, _ = el.Evaluate(evalHelper(js.ElementOverlay,165		id,166		msg,167	).ByPromise())168	removeOverlay = func() {169		_, _ = el.Evaluate(evalHelper(js.RemoveOverlay, id))170	}171	return172}173func (el *Element) tryTrace(typ TraceType, msg ...interface{}) func() {174	if !el.page.browser.trace {175		return func() {}176	}177	msg = append([]interface{}{typ}, msg...)178	msg = append(msg, el)179	el.page.browser.logger.Println(msg...)180	return el.Overlay(fmt.Sprint(msg))181}182func (m *Mouse) initMouseTracer() {183	_, _ = m.page.Evaluate(evalHelper(js.InitMouseTracer, m.id, assets.MousePointer).ByPromise())184}185func (m *Mouse) updateMouseTracer() bool {186	res, err := m.page.Evaluate(evalHelper(js.UpdateMouseTracer, m.id, m.x, m.y))187	if err != nil {188		return true189	}190	return res.Value.Bool()191}192// Serve a port, if host is empty a random port will be used.193func serve(host string) (string, *http.ServeMux, func() error) {194	if host == "" {195		host = "127.0.0.1:0"196	}197	mux := http.NewServeMux()198	srv := &http.Server{Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {199		defer func() {200			if err := recover(); err != nil {...

evalHelper

Using AI Code Generation

1import (2func main() {3    browser := rod.New().Connect()4    page.WaitLoad()5    value, err := page.Eval(`document.querySelector("input[name=q]").value`)6    if err != nil {7        panic(err)8    }9    fmt.Println(value)10}11import (12func main() {13    browser := rod.New().Connect()14    page.WaitLoad()15    value, err := page.Eval(`document.querySelector("input[name=q]").value`)16    if err != nil {17        panic(err)18    }19    fmt.Println(value)20}21import (22func main() {23    browser := rod.New().Connect()24    page.WaitLoad()25    value, err := page.Eval(`document.querySelector("input[name=q]").value`)26    if err != nil {27        panic(err)28    }29    fmt.Println(value)30}31import (32func main() {33    browser := rod.New().Connect()34    page.WaitLoad()35    value, err := page.Eval(`document

evalHelper

Using AI Code Generation

1import (2func main() {3    r := rod.New().Connect()4    page := r.Page("")5    result, _ := page.EvalObject(`document.querySelector("h1").innerText`)6    fmt.Println(result.Value)7}

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.