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How to use ElementR method of rod Package

Best Rod code snippet using rod.ElementR

query.go

Source:query.go

...123}124// HasR an element that matches the css selector and its display text matches the jsRegex.125// å¨é¡µé¢ä¸ç¨csséæ©å¨å¹éï¼å¶æ¾ç¤ºææ¬ä¸jsRegexå¹éï¼ä½¿ç¨ç»åçæ¹å¼æ¥æ¾æä¸ªåç´ æ¯å¦åå¨ã126func (p *Page) HasR(selector, jsRegex string) (bool, *Element, error) {127	el, err := p.Sleeper(NotFoundSleeper).ElementR(selector, jsRegex)128	if errors.Is(err, &ErrElementNotFound{}) {129		return false, nil, nil130	}131	if err != nil {132		return false, nil, err133	}134	return true, el.Sleeper(p.sleeper), nil135}136// Element retries until an element in the page that matches the CSS selector, then returns137// the matched element.138// Element ä¼éè¯ï¼ç´å°é¡µé¢ä¸çåç´ ä¸CSSéæ©å¨å¹éï¼ç¶åè¿åå¹éçåç´ ã139func (p *Page) Element(selector string) (*Element, error) {140	return p.ElementByJS(evalHelper(js.Element, selector))141}142// ElementR retries until an element in the page that matches the css selector and it's text matches the jsRegex,143// then returns the matched element.144// ElementR ä¼éè¯ï¼ç´å°é¡µé¢ä¸åºç°ç¬¦åcsséæ©å¨çåç´ ï¼å¹¶ä¸å¶ææ¬ç¬¦åjsRegexï¼ç¶åè¿åå¹éçåç´ ã145func (p *Page) ElementR(selector, jsRegex string) (*Element, error) {146	return p.ElementByJS(evalHelper(js.ElementR, selector, jsRegex))147}148// ElementX retries until an element in the page that matches one of the XPath selectors, then returns149// the matched element.150// ElementX ä¼éè¯ï¼ç´å°é¡µé¢ä¸çåç´ ä¸XPathéæ©å¨å¹éï¼ç¶åè¿åå¹éçåç´ ã151func (p *Page) ElementX(xPath string) (*Element, error) {152	return p.ElementByJS(evalHelper(js.ElementX, xPath))153}154// ElementByJS returns the element from the return value of the js function.155// ElementByJS ä»jså½æ°çè¿åå¼è¿ååç´ ã156// If sleeper is nil, no retry will be performed.157// å¦æ sleeper æ¯ nil,åä¸ä¼æ§è¡éè¯158// By default, it will retry until the js function doesn't return null.159// é»è®¤æåµä¸ï¼ä¼ä¸ç´éè¯ç´å° JS å½æ°ä¸ä¼è¿å null160// To customize the retry logic, check the examples of Page.Sleeper.161// è¦èªå®ä¹éè¯é»è¾ï¼è¯·æ¥ç Page.Sleeper çç¤ºä¾ã162func (p *Page) ElementByJS(opts *EvalOptions) (*Element, error) {163	var res *proto.RuntimeRemoteObject164	var err error165	removeTrace := func() {}166	err = utils.Retry(p.ctx, p.sleeper(), func() (bool, error) {167		remove := p.tryTraceQuery(opts)168		removeTrace()169		removeTrace = remove170		res, err = p.Evaluate(opts.ByObject())171		if err != nil {172			return true, err173		}174		if res.Type == proto.RuntimeRemoteObjectTypeObject && res.Subtype == proto.RuntimeRemoteObjectSubtypeNull {175			return false, nil176		}177		return true, nil178	})179	removeTrace()180	if err != nil {181		return nil, err182	}183	if res.Subtype != proto.RuntimeRemoteObjectSubtypeNode {184		return nil, &ErrExpectElement{res}185	}186	return p.ElementFromObject(res)187}188// Elements returns all elements that match the css selector189// è¿åå CSS éæ©å¨å¹éçææåç´ 190func (p *Page) Elements(selector string) (Elements, error) {191	return p.ElementsByJS(evalHelper(js.Elements, selector))192}193// ElementsX returns all elements that match the XPath selector194// è¿åå XPath éæ©å¨å¹éçææåç´ 195func (p *Page) ElementsX(xpath string) (Elements, error) {196	return p.ElementsByJS(evalHelper(js.ElementsX, xpath))197}198// ElementsByJS returns the elements from the return value of the js199// ElementsByJS ä» js çè¿åå¼ä¸è¿ååç´ ã200func (p *Page) ElementsByJS(opts *EvalOptions) (Elements, error) {201	res, err := p.Evaluate(opts.ByObject())202	if err != nil {203		return nil, err204	}205	if res.Subtype != proto.RuntimeRemoteObjectSubtypeArray {206		return nil, &ErrExpectElements{res}207	}208	defer func() { err = p.Release(res) }()209	list, err := proto.RuntimeGetProperties{210		ObjectID:      res.ObjectID,211		OwnProperties: true,212	}.Call(p)213	if err != nil {214		return nil, err215	}216	elemList := Elements{}217	for _, obj := range list.Result {218		if obj.Name == "__proto__" || obj.Name == "length" {219			continue220		}221		val := obj.Value222		if val.Subtype != proto.RuntimeRemoteObjectSubtypeNode {223			return nil, &ErrExpectElements{val}224		}225		el, err := p.ElementFromObject(val)226		if err != nil {227			return nil, err228		}229		elemList = append(elemList, el)230	}231	return elemList, err232}233// Search for the given query in the DOM tree until the result count is not zero, before that it will keep retrying.234// å¨DOMæ ä¸æç´¢ç»å®çæ¥è¯¢ï¼ç´å°ç»æè®¡æ°ä¸ä¸ºé¶ï¼å¨æ¤ä¹åï¼å®å°ä¸æéè¯ã235// The query can be plain text or css selector or xpath.236// æ¥è¯¢å¯ä»¥æ¯çº¯ææ¬ãcsséæ©å¨æxpathã237// It will search nested iframes and shadow doms too.238// å®ä¹ä¼æç´¢åµå¥çiframesåå½±ådomã239func (p *Page) Search(query string) (*SearchResult, error) {240	sr := &SearchResult{241		page:    p,242		restore: p.EnableDomain(proto.DOMEnable{}),243	}244	err := utils.Retry(p.ctx, p.sleeper(), func() (bool, error) {245		if sr.DOMPerformSearchResult != nil {246			_ = proto.DOMDiscardSearchResults{SearchID: sr.SearchID}.Call(p)247		}248		res, err := proto.DOMPerformSearch{249			Query:                     query,250			IncludeUserAgentShadowDOM: true,251		}.Call(p)252		if err != nil {253			return true, err254		}255		sr.DOMPerformSearchResult = res256		if res.ResultCount == 0 {257			return false, nil258		}259		result, err := proto.DOMGetSearchResults{260			SearchID:  res.SearchID,261			FromIndex: 0,262			ToIndex:   1,263		}.Call(p)264		if err != nil {265			// when the page is still loading the search result is not ready266			// å½é¡µé¢ä»ç¶å¨å è½½æ¶ï¼æ¤æ¶çæç´¢ç»æå°æªåå¤å¥½ã267			if errors.Is(err, cdp.ErrCtxNotFound) ||268				errors.Is(err, cdp.ErrSearchSessionNotFound) {269				return false, nil270			}271			return true, err272		}273		id := result.NodeIds[0]274		// TODO: This is definitely a bad design of cdp, hope they can optimize it in the future.275		// It's unnecessary to ask the user to explicitly call it.276		// æ²¡æå¿è¦è¦æ±ç¨æ·æç¡®å°è°ç¨å®ã277		//278		// When the id is zero, it means the proto.DOMDocumentUpdated has fired which will279		// invlidate all the existing NodeID. We have to call proto.DOMGetDocument280		// to reset the remote browser's tracker.281		// å½idä¸º0æ¶ï¼æå³çproto.DOMDocumentUpdatedå·²ç»è§¦åï¼å®å°è°ç¨ææç°æçNodeIDã282		// æä»¬å¿é¡»è°ç¨proto.DOMGetDocumentæ¥éç½®è¿ç¨æµè§å¨çè·è¸ªå¨ã283		if id == 0 {284			_, _ = proto.DOMGetDocument{}.Call(p)285			return false, nil286		}287		el, err := p.ElementFromNode(&proto.DOMNode{NodeID: id})288		if err != nil {289			return true, err290		}291		sr.First = el292		return true, nil293	})294	if err != nil {295		return nil, err296	}297	return sr, nil298}299// SearchResult handler300type SearchResult struct {301	*proto.DOMPerformSearchResult302	page    *Page303	restore func()304	// First element in the search result305	// å¨æç´¢ç»æä¸çç¬¬ä¸ä¸ªåç´ 306	First *Element307}308// Get l elements at the index of i from the remote search result.309// ä»è¿ç¨æç´¢ç»æä¸è·åç´¢å¼ä¸ºiçlä¸ªåç´ ã310func (s *SearchResult) Get(i, l int) (Elements, error) {311	result, err := proto.DOMGetSearchResults{312		SearchID:  s.SearchID,313		FromIndex: i,314		ToIndex:   i + l,315	}.Call(s.page)316	if err != nil {317		return nil, err318	}319	list := Elements{}320	for _, id := range result.NodeIds {321		el, err := s.page.ElementFromNode(&proto.DOMNode{NodeID: id})322		if err != nil {323			return nil, err324		}325		list = append(list, el)326	}327	return list, nil328}329// All returns all elements330// è¿åææåç´ 331func (s *SearchResult) All() (Elements, error) {332	return s.Get(0, s.ResultCount)333}334// Release the remote search result335// éæ¾æç´¢ç»æ336func (s *SearchResult) Release() {337	s.restore()338	_ = proto.DOMDiscardSearchResults{SearchID: s.SearchID}.Call(s.page)339}340type raceBranch struct {341	condition func(*Page) (*Element, error)342	callback  func(*Element) error343}344// RaceContext stores the branches to race345// åå¨äº race çåæ¯346type RaceContext struct {347	page     *Page348	branches []*raceBranch349}350// Race creates a context to race selectors351// ä¸º race éæ©å¨åå»ºäºä¸ä¸ª RaceContext352func (p *Page) Race() *RaceContext {353	return &RaceContext{page: p}354}355// Element the doc is similar to MustElement356// ç±»ä¼¼äº MustElement357func (rc *RaceContext) Element(selector string) *RaceContext {358	rc.branches = append(rc.branches, &raceBranch{359		condition: func(p *Page) (*Element, error) { return p.Element(selector) },360	})361	return rc362}363// ElementFunc takes a custom function to determine race success364// ElementFunc éç¨èªå®ä¹å½æ°ç¡®å® race æå365func (rc *RaceContext) ElementFunc(fn func(*Page) (*Element, error)) *RaceContext {366	rc.branches = append(rc.branches, &raceBranch{367		condition: fn,368	})369	return rc370}371// ElementX the doc is similar to ElementX372// ç±»ä¼¼äº ElementX373func (rc *RaceContext) ElementX(selector string) *RaceContext {374	rc.branches = append(rc.branches, &raceBranch{375		condition: func(p *Page) (*Element, error) { return p.ElementX(selector) },376	})377	return rc378}379// ElementR the doc is similar to ElementR380//ç±»ä¼¼äº ElementR381func (rc *RaceContext) ElementR(selector, regex string) *RaceContext {382	rc.branches = append(rc.branches, &raceBranch{383		condition: func(p *Page) (*Element, error) { return p.ElementR(selector, regex) },384	})385	return rc386}387// ElementByJS the doc is similar to MustElementByJS388// ç±»ä¼¼äº MustELementByJS389func (rc *RaceContext) ElementByJS(opts *EvalOptions) *RaceContext {390	rc.branches = append(rc.branches, &raceBranch{391		condition: func(p *Page) (*Element, error) { return p.ElementByJS(opts) },392	})393	return rc394}395// Handle adds a callback function to the most recent chained selector.396// Handle ä¸ºæè¿çé¾å¼éæ©å¨æ·»å ä¸ä¸ªåè°å½æ°ã397// The callback function is run, if the corresponding selector is398// present first, in the Race condition.399// å¦æç¸åºçéæ©å¨é¦ååºç°å¨ trace æ¡ä»¶ä¸ï¼åè°å½æ°å°±ä¼è¿è¡ã400func (rc *RaceContext) Handle(callback func(*Element) error) *RaceContext {401	rc.branches[len(rc.branches)-1].callback = callback402	return rc403}404// Do the race405// æ§è¡ Trace406func (rc *RaceContext) Do() (*Element, error) {407	var el *Element408	err := utils.Retry(rc.page.ctx, rc.page.sleeper(), func() (stop bool, err error) {409		for _, branch := range rc.branches {410			bEl, err := branch.condition(rc.page.Sleeper(NotFoundSleeper))411			if err == nil {412				el = bEl.Sleeper(rc.page.sleeper)413				if branch.callback != nil {414					err = branch.callback(el)415				}416				return true, err417			} else if !errors.Is(err, &ErrElementNotFound{}) {418				return true, err419			}420		}421		return422	})423	return el, err424}425// Has an element that matches the css selector426// å¤ææ¯å¦æåCSSéæ©å¨ç¸å¹éçåç´ 427func (el *Element) Has(selector string) (bool, *Element, error) {428	el, err := el.Element(selector)429	if errors.Is(err, &ErrElementNotFound{}) {430		return false, nil, nil431	}432	return err == nil, el, err433}434// HasX an element that matches the XPath selector435// å¤ææ¯å¦æåXPathç¸å¹éçåç´ 436func (el *Element) HasX(selector string) (bool, *Element, error) {437	el, err := el.ElementX(selector)438	if errors.Is(err, &ErrElementNotFound{}) {439		return false, nil, nil440	}441	return err == nil, el, err442}443// HasR returns true if a child element that matches the css selector and its text matches the jsRegex.444// å¦ææä¸ä¸ªç¬¦åcsséæ©å¨çååç´ ï¼å¹¶ä¸å¶ææ¬ç¬¦åjsRegexï¼åHasRè¿åtrueã445func (el *Element) HasR(selector, jsRegex string) (bool, *Element, error) {446	el, err := el.ElementR(selector, jsRegex)447	if errors.Is(err, &ErrElementNotFound{}) {448		return false, nil, nil449	}450	return err == nil, el, err451}452// Element returns the first child that matches the css selector453// è¿åç¬¬ä¸ä¸ªåCSSéæ©å¨å¹éçååç´ 454func (el *Element) Element(selector string) (*Element, error) {455	return el.ElementByJS(evalHelper(js.Element, selector))456}457// ElementR returns the first child element that matches the css selector and its text matches the jsRegex.458// ElementRè¿åç¬¦åcsséæ©å¨çç¬¬ä¸ä¸ªååç´ ï¼å¹¶ä¸å¶ææ¬ç¬¦åjsRegexã459func (el *Element) ElementR(selector, jsRegex string) (*Element, error) {460	return el.ElementByJS(evalHelper(js.ElementR, selector, jsRegex))461}462// ElementX returns the first child that matches the XPath selector463// è¿åç¬¬ä¸ä¸ªå XPath éæ©å¨ç¸å¹éçååç´ 464func (el *Element) ElementX(xPath string) (*Element, error) {465	return el.ElementByJS(evalHelper(js.ElementX, xPath))466}467// ElementByJS returns the element from the return value of the js468// ElementByJS ä» js çè¿åå¼ä¸è¿åè¯¥åç´ ã469func (el *Element) ElementByJS(opts *EvalOptions) (*Element, error) {470	e, err := el.page.Sleeper(NotFoundSleeper).ElementByJS(opts.This(el.Object))471	if err != nil {472		return nil, err473	}474	return e.Sleeper(el.sleeper), nil...

dev_helpers_test.go

Source:dev_helpers_test.go

...75}76func TestExposeHelpers(t *testing.T) {77	g := setup(t)78	p := g.newPage(g.srcFile("fixtures/click.html"))79	p.ExposeHelpers(js.ElementR)80	g.Eq(p.MustElementByJS(`() => rod.elementR('button', 'click me')`).MustText(), "click me")81}...

ElementR

Using AI Code Generation

1import (2func main() {3	browser := rod.New().ControlURL(launcher.New().MustLaunch()).MustConnect()4	defer browser.MustClose()5	page.MustElementR("input[name=q]", "go-rod").MustInput("rod").MustPress(rod.Enter)6	fmt.Println(page.MustElement("#result-stats").MustText())7}8import (9func main() {10	browser := rod.New().ControlURL(launcher.New().MustLaunch()).MustConnect()11	defer browser.MustClose()12	page.MustElementR("input[name=q]", "go-rod").MustInput("rod").MustPress(rod.Enter)13	fmt.Println(page.MustElement("#result-stats").MustText())14}15import (16func main() {17	browser := rod.New().ControlURL(launcher.New().MustLaunch()).MustConnect()18	defer browser.MustClose()19	page.MustElementR("input[name=q]", "go-rod").MustInput("rod").MustPress(rod.Enter)20	fmt.Println(page.MustElement("#result-stats").MustText())21}22import (23func main() {24	browser := rod.New().ControlURL(launcher.New().MustLaunch()).MustConnect()25	defer browser.MustClose()26	page.MustElementR("input[name=q]", "go-rod").MustInput("rod").MustPress(rod.Enter)

ElementR

Using AI Code Generation

1import (2func main() {3    page.MustElementR("input", &proto.DOMQuerySelector{4        Selector: "#tsf > div:nth-child(2) > div > div.RNNXgb > div > div.a4bIc > input",5    }).MustInput("rod")6    page.MustElementR("input", &proto.DOMQuerySelector{7        Selector: "#tsf > div:nth-child(2) > div > div.FPdoLc.VlcLAe > center > input.gNO89b",8    }).MustClick()9    page.MustElementR("div", &proto.DOMQuerySelector{10        Selector: "#rso > div:nth-child(1) > div > div > div > div > div.r > a > h3",11    }).MustClick()12    page.MustElementR("div", &proto.DOMQuerySelector{13        Selector: "body > div > div:nth-child(1) > div:nth-child(3) > div:nth-child(2) > div:nth-child(1) > div > div > div:nth-child(2) > div:nth-child(2) > div:nth-child(1) > div > div > div > div > div > div > div:nth-child(1) > div:nth-child(1) > div:nth-child(2) > div > div > div > div:nth-child(1) > div > div > div:nth-child(1) > div > div > div > div > div > div > div > div > div > div > div > div:nth-child(1) > di

ElementR

Using AI Code Generation

1import (2func main() {3	url := launcher.New().MustLaunch()4	browser := rod.New().ControlURL(url).MustConnect()5	page.MustElementR("input[title='Search']").MustInput("Rod")6	fmt.Println("Rod is the best")7}

ElementR

Using AI Code Generation

1import (2func main() {3	browser := rod.New().Connect()4	el := page.ElementR("h1", "Example Domain")5	fmt.Println(el.Text())6}7import (8func main() {9	browser := rod.New().Connect()10	el := page.Elements("h1")11	fmt.Println(len(el))12}13import (14func main() {15	browser := rod.New().Connect()16	el := page.ElementsR("h1", "Example Domain")17	fmt.Println(len(el))18}19import (20func main() {21	browser := rod.New().Connect()22	fmt.Println(el.Text())23}24import (25func main() {26	browser := rod.New().Connect()27	fmt.Println(el.Text())28}29import (30func main() {31	browser := rod.New().Connect()32	fmt.Println(len(el))33}34import (35func main() {36	browser := rod.New().Connect()

ElementR

Using AI Code Generation

1import "fmt"2import "github.com/go-rod/rod"3func main() {4    input := page.MustElementR("input[name=q]")5    input.MustInput("rod")6    input.MustPress(input.Enter)7    page.MustWaitLoad()8    fmt.Println(page.MustElement("h3").MustText())9}10import "fmt"11import "github.com/go-rod/rod"12func main() {13    input := page.MustElementR("input[name=q]")14    input.MustInput("rod")15    input.MustPress(input.Enter)16    page.MustWaitLoad()17    fmt.Println(page.MustElement("h3").MustText())18}19import "fmt"20import "github.com/go-rod/rod"21func main() {22    input := page.MustElementR("input[name=q]")23    input.MustInput("rod")24    input.MustPress(input.Enter)25    page.MustWaitLoad()26    fmt.Println(page.MustElement("h3").MustText())27}28import "fmt"29import "github.com/go-rod/rod"30func main() {31    input := page.MustElementR("input[name=q]")32    input.MustInput("rod")33    input.MustPress(input.Enter)34    page.MustWaitLoad()35    fmt.Println(page.MustElement("h3").MustText())36}37import "fmt"38import "github.com/go-rod/rod"39func main() {40    input := page.MustElementR("input[name=q]")41    input.MustInput("rod")42    input.MustPress(input

ElementR

Using AI Code Generation

1import "fmt"2type rod struct {3}4func (r *rod) ElementR() {5}6func main() {7r := rod{10}8r.ElementR()9fmt.Println(r.length)10}11import "fmt"12type rod struct {13}14func (r rod) ElementR() {15}16func main() {17r := rod{10}18r.ElementR()19fmt.Println(r.length)20}21import "fmt"22type rod struct {23}24func (r *rod) ElementR() {25}26func main() {27r := rod{10}28r.ElementR()29fmt.Println(r.length)30}31import "fmt"32type rod struct {33}34func (r *rod) ElementR() {35}36func main() {37r := &rod{10}38r.ElementR()39fmt.Println(r.length)40}41import "fmt"42type rod struct {43}44func (r rod) ElementR() {45}46func main() {47r := &rod{10}48r.ElementR()49fmt.Println(r.length)50}51import "fmt"52type rod struct {53}54func (r rod) ElementR() {55}56func main() {57r := rod{10}58r.ElementR()59fmt.Println(r.length)60}61import "fmt"62type rod struct {63}64func (r rod) ElementR() {65}66func main() {67r := rod{10}

ElementR

Using AI Code Generation

1import "fmt"2type rod struct{3}4func (r rod) ElementR() int{5}6func main(){7r1 := rod{10}8fmt.Println(r1.ElementR())9}10import "fmt"11type rod struct{12}13func (r *rod) ElementR() int{14}15func main(){16r1 := rod{10}17fmt.Println(r1.ElementR())18}19import "fmt"20type rod struct{21}22func (r *rod) ElementR() int{23}24func main(){25r1 := rod{10}26fmt.Println(r1.ElementR())27}

ElementR

Using AI Code Generation

1import (2func main() {3r.ElementR(2.0)4fmt.Println("The resistance of the rod is", r.R)5}6import "math"7type Rod struct {8}9func (r *Rod) ElementR(l float64) {10r.R = l / (math.Pi * math.Pow(0.5, 2))11}12import (13func TestElementR(t *testing.T) {14r.ElementR(2.0)15if r.R != 1.2732395447351628 {16t.Errorf("ElementR(2.0) = %f; want 1.2732395447351628", r.R)17}18}19The test code is placed in a separate file as it is not part of the rod package. It is used only for testing the rod package. When we run the test code, the test code imports the rod package and calls the ElementR method of the Rod

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