How to use ElementsByJS method of rod Package

Best Rod code snippet using rod.ElementsByJS

query.go

Source:query.go Github

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...187}188// Elements returns all elements that match the css selector189// 返回和 CSS 选择器匹配的所有元素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// 返回和 XPath 选择器匹配的所有元素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 从 js 的返回值中返回元素。200func (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// 在DOM树中搜索给定的查询，直到结果计数不为零，在此之前，它将不断重试。235// The query can be plain text or css selector or xpath.236// 查询可以是纯文本、css选择器或xpath。237// It will search nested iframes and shadow doms too.238// 它也会搜索嵌套的iframes和影子dom。239func (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 // 当页面仍然在加载时，此时的搜索结果尚未准备好。267 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 // 没有必要要求用户明确地调用它。277 //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 // 当id为0时，意味着proto.DOMDocumentUpdated已经触发，它将调用所有现有的NodeID。282 // 我们必须调用proto.DOMGetDocument来重置远程浏览器的跟踪器。283 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 // 在搜索结果中的第一个元素306 First *Element307}308// Get l elements at the index of i from the remote search result.309// 从远程搜索结果中获取索引为i的l个元素。310func (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// 返回所有元素331func (s *SearchResult) All() (Elements, error) {332 return s.Get(0, s.ResultCount)333}334// Release the remote search result335// 释放搜索结果336func (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// 存储了 race 的分支346type RaceContext struct {347 page *Page348 branches []*raceBranch349}350// Race creates a context to race selectors351// 为 race 选择器创建了一个 RaceContext352func (p *Page) Race() *RaceContext {353 return &RaceContext{page: p}354}355// Element the doc is similar to MustElement356// 类似于 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 采用自定义函数确定 race 成功365func (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// 类似于 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//类似于 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// 类似于 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 为最近的链式选择器添加一个回调函数。397// The callback function is run, if the corresponding selector is398// present first, in the Race condition.399// 如果相应的选择器首先出现在 trace 条件中，回调函数就会运行。400func (rc *RaceContext) Handle(callback func(*Element) error) *RaceContext {401 rc.branches[len(rc.branches)-1].callback = callback402 return rc403}404// Do the race405// 执行 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// 判断是否有和CSS选择器相匹配的元素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// 判断是否有和XPath相匹配的元素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// 如果有一个符合css选择器的子元素，并且其文本符合jsRegex，则HasR返回true。445func (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// 返回第一个和CSS选择器匹配的子元素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// ElementR返回符合css选择器的第一个子元素，并且其文本符合jsRegex。459func (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// 返回第一个和 XPath 选择器相匹配的子元素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 从 js 的返回值中返回该元素。469func (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), nil475}476// Parent returns the parent element in the DOM tree477// 返回 DOM 树中的父元素。478func (el *Element) Parent() (*Element, error) {479 return el.ElementByJS(Eval(`() => this.parentElement`))480}481// Parents that match the selector482// 和选择器匹配的父元素。483func (el *Element) Parents(selector string) (Elements, error) {484 return el.ElementsByJS(evalHelper(js.Parents, selector))485}486// Next returns the next sibling element in the DOM tree487// 返回DOM树中的下一个同级元素488func (el *Element) Next() (*Element, error) {489 return el.ElementByJS(Eval(`() => this.nextElementSibling`))490}491// Previous returns the previous sibling element in the DOM tree492// 返回DOM树中的上一个同级元素493func (el *Element) Previous() (*Element, error) {494 return el.ElementByJS(Eval(`() => this.previousElementSibling`))495}496// Elements returns all elements that match the css selector497// 返回和 CSS 选择器相匹配的所有元素498func (el *Element) Elements(selector string) (Elements, error) {499 return el.ElementsByJS(evalHelper(js.Elements, selector))500}501// ElementsX returns all elements that match the XPath selector502// 返回和 XPath 选择器相匹配的所有元素503func (el *Element) ElementsX(xpath string) (Elements, error) {504 return el.ElementsByJS(evalHelper(js.ElementsX, xpath))505}506// ElementsByJS returns the elements from the return value of the js507// ElementsByJS 从 js 的返回值中返回元素。508func (el *Element) ElementsByJS(opts *EvalOptions) (Elements, error) {509 return el.page.Context(el.ctx).ElementsByJS(opts.This(el.Object))510}...

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query_test.go

Source:query_test.go Github

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...249 _, err := p.ElementByJS(rod.Eval(`1`))250 t.Is(err, &rod.ErrExpectElement{})251 t.Eq(err.Error(), "expect js to return an element, but got: {\"type\":\"number\",\"value\":1,\"description\":\"1\"}")252}253func (t T) PageElementsByJS() {254 p := t.page.MustNavigate(t.srcFile("fixtures/selector.html")).MustWaitLoad()255 t.Len(p.MustElementsByJS("document.querySelectorAll('button')"), 4)256 _, err := p.ElementsByJS(rod.Eval(`[1]`))257 t.Is(err, &rod.ErrExpectElements{})258 t.Eq(err.Error(), "expect js to return an array of elements, but got: {\"type\":\"number\",\"value\":1,\"description\":\"1\"}")259 _, err = p.ElementsByJS(rod.Eval(`1`))260 t.Eq(err.Error(), "expect js to return an array of elements, but got: {\"type\":\"number\",\"value\":1,\"description\":\"1\"}")261 _, err = p.ElementsByJS(rod.Eval(`foo()`))262 t.Err(err)263 t.mc.stubErr(1, proto.RuntimeGetProperties{})264 _, err = p.ElementsByJS(rod.Eval(`[document.body]`))265 t.Err(err)266 t.mc.stubErr(4, proto.RuntimeCallFunctionOn{})267 t.Err(p.Elements("button"))268}269func (t T) PageElementTimeout() {270 page := t.page.MustNavigate(t.blank())271 start := time.Now()272 _, err := page.Timeout(300 * time.Millisecond).Element("not-exists")273 t.Is(err, context.DeadlineExceeded)274 t.Gte(time.Since(start), 300*time.Millisecond)275}276func (t T) PageElementMaxRetry() {277 page := t.page.MustNavigate(t.blank())278 s := func() utils.Sleeper { return utils.CountSleeper(5) }...

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ElementsByJS

Using AI Code Generation

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1import (2func main() {3 browser := rod.New().ControlURL(launcher.New().MustLaunch()).MustConnect()4 page.MustWaitLoad()5 input := page.MustElement("input[name='q']")6 input.MustInput("rod")7 page.MustElement("input[name='btnK']").MustClick()8 page.MustWaitLoad()9 links := page.MustElementsByJS(`10 Array.from(document.querySelectorAll('h3')).map(el => el.innerText)11 for _, link := range links {12 println(link.MustText())13 }14}

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ElementsByJS

Using AI Code Generation

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1import (2func main() {3 browser := rod.New().MustConnect()4 page.MustElement("input[name=q]").MustInput("rod").MustPress(proto.InputKeyEventEnter)5 page.MustElementByJS(`[href="/search?q=rod&oq=rod"]`).MustClick()6 fmt.Println(page.MustInfo().URL)7}

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ElementsByJS

Using AI Code Generation

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1import (2func main() {3 l := launcher.New().Headless(false)4 defer l.Cleanup()5 page.MustElement("#hplogo").MustWaitLoad()6 page.MustElement("#hplogo").MustScrollIntoView()7 page.MustElement("#hplogo").MustHover()8 page.MustElement("#hplogo").MustClick()9 page.MustElement("#hplogo").MustWaitStable()10 page.MustElement("#hplogo").MustWaitInvisible()11 page.MustElement("#hplogo").MustWaitVisible()12 page.MustElement("#hplogo").MustWaitReady()13 page.MustElement("#hplogo").MustWaitRequestIdle()14 page.MustElement("#hplogo").MustWaitNavigation()15 page.MustElement("#hplogo").MustWaitLoad()16 page.MustElement("#hplogo").MustWaitStable()17 page.MustElement("#hplogo").MustWaitInvisible()18 page.MustElement("#hplogo").MustWaitVisible()19 page.MustElement("#hplogo").MustWaitReady()20 page.MustElement("#hplogo").MustWaitRequestIdle()21 page.MustElement("#hplogo").MustWaitNavigation()22 page.MustElement("#hplogo").MustWaitLoad()23 page.MustElement("#hplogo").MustWaitStable()24 page.MustElement("#hplogo").MustWaitInvisible()25 page.MustElement("#hplogo").MustWaitVisible()26 page.MustElement("#hplogo").MustWaitReady()27 page.MustElement("#hplogo").MustWaitRequestIdle()28 page.MustElement("#hplogo").MustWaitNavigation()29 page.MustElement("#hplogo").MustWaitLoad()30 page.MustElement("#hplogo").MustWaitStable()31 page.MustElement("#hplogo").MustWaitInvisible()32 page.MustElement("#hplogo").MustWaitVisible()33 page.MustElement("#hplogo").MustWaitReady()34 page.MustElement("#hplogo").MustWaitRequestIdle()35 page.MustElement("#hplogo").MustWaitNavigation()36 page.MustElement("#hplogo").MustWaitLoad()37 page.MustElement("#hplogo").MustWaitStable()38 page.MustElement("#hplogo").MustWaitInvisible()39 page.MustElement("#hplogo").MustWaitVisible()40 page.MustElement("#hplogo").MustWaitReady()41 page.MustElement("#hplogo").MustWaitRequestIdle()42 page.MustElement("#hplogo").Must

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ElementsByJS

Using AI Code Generation

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1import (2func main() {3 l := launcher.New().Headless(false)4 defer l.Cleanup()5 browser := rod.New().ControlURL(l).MustConnect()6 page := browser.MustPage("")7 page.MustElement("#tsf > div:nth-child(2) > div > div.FPdoLc.tfB0Bf > center > input.gNO89b").MustClick()8 page.MustElement("#tsf > div:nth-child(2) > div > div.FPdoLc.tfB0Bf > center > input.gNO89b").MustClick()9 page.MustElement("#tsf > div:nth-child(2) > div > div.FPdoLc.tfB0Bf > center > input.gNO89b").MustClick()10 page.MustElement("#tsf > div:nth-child(2) > div > div.FPdoLc.tfB0Bf > center > input.gNO89b").MustClick()11 page.MustElement("#tsf > div:nth-child(2) > div > div.FPdoLc.tfB0Bf > center > input.gNO89b").MustClick()12 page.MustElement("#tsf > div:nth-child(2) > div > div.FPdoLc.tfB0Bf > center > input.gNO89b").MustClick()13 page.MustElement("#tsf > div:nth-child(2) > div > div.FPdoLc.tfB0Bf > center > input.gNO89b").MustClick()14 page.MustElement("#tsf > div:nth-child(2) > div > div.FPdoLc.tfB0Bf > center > input.gNO89b").MustClick()15 page.MustElement("#tsf > div:nth-child(2) > div > div.FPdoLc.tfB0Bf > center > input.gNO89b").MustClick()16 page.MustElement("#tsf > div:nth-child(2) > div > div.FPdoLc.tfB0Bf > center > input.gNO89b").MustClick()17 page.MustElement("#tsf > div:nth-child(2) > div > div.FPdoLc.tfB0Bf > center > input.gNO89

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ElementsByJS

Using AI Code Generation

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1import (2func main() {3 l := launcher.New().Bin("/usr/bin/chromium-browser").Headless(false).MustLaunch()4 defer l.Close()5 page.MustElement("input").MustInput("rod").MustPress(input.Enter)6 page.MustElement("input").MustInput("rod").MustPress(input.Enter).MustElement("h3").MustClick()

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ElementsByJS

Using AI Code Generation

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1import (2func main() {3 browser := rod.New().ControlURL(launcher.New().MustLaunch()).MustConnect()4 input := page.MustElementByJS(`document.querySelector("input")`)5 input.MustInput("rod")6 fmt.Println(input.MustProperty("value").String())7}8import (9func main() {10 browser := rod.New().ControlURL(launcher.New().MustLaunch()).MustConnect()11 input := page.MustElementByJS(`document.querySelector("input")`)12 input.MustInput("rod")13 fmt.Println(input.MustProperty("value").String())14}15import (16func main() {17 browser := rod.New().ControlURL(launcher.New().MustLaunch()).MustConnect()18 input := page.MustElementByJS(`document.querySelector("input")`)19 input.MustInput("rod")20 fmt.Println(input.MustProperty("value").String())21}22import (

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ElementsByJS

Using AI Code Generation

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1import (2func main() {3 browser := rod.New().ControlURL(launcher.New().MustLaunch()).MustConnect()4 elements := page.MustElements(".example")5 for _, element := range elements {6 fmt.Println(element.MustText())7 }8}9page.ElementByXPath(xPath string)10import (11func main() {12 browser := rod.New().ControlURL(launcher.New().MustLaunch()).MustConnect()13 fmt.Println(element.MustText())14}15page.ElementsByXPath(xPath string)

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ElementsByJS

Using AI Code Generation

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1import (2func main() {3 browser := rod.New().Connect()4 defer browser.Close()5 page.ElementByJS(`document.querySelector("a[href='/gp/help/customer/display.html']").click()`)6 text := page.ElementByJS(`document.querySelector("h1.a-spacing-small").textContent`).Text()7 fmt.Println(text)8}

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