Backend DevelopmentGolangchromedp How to select specific textarea from multiple textareas with dynamic nameschromedp How to select specific textarea from multiple textareas with dynamic names
I have a page with multiple text areas consisting of dynamic names and the same class. This means I can't select them by id, name, class or type.
All I know is that out of the 5 textareas, I need the first one, and I want to change the value of that textarea.
Can anyone tell me how to do this using chromedp? Been trying for two days with no progress.
Find the answer:
const n = document.querySelector('.elementor-repeater-fields:nth-child(2) textarea'); console.log(n);
Correct answer
Use pseudo-class :first-child a> or :nth-child to select the target element. For example:
package main
import (
"context"
"fmt"
"net/http"
"net/http/httptest"
"time"
"github.com/chromedp/chromedp"
)
func main() {
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprint(w, `
<html>
<body>
<textarea></textarea>
<textarea></textarea>
<textarea></textarea>
</body>
</html>
`)
}))
defer ts.Close()
opts := append(chromedp.DefaultExecAllocatorOptions[:],
chromedp.Flag("headless", false),
)
ctx, cancel := chromedp.NewExecAllocator(context.Background(), opts...)
defer cancel()
ctx, cancel = chromedp.NewContext(ctx)
defer cancel()
err := chromedp.Run(ctx,
chromedp.Navigate(ts.URL),
chromedp.Sleep(time.Second),
chromedp.SetValue(`body>textarea:first-child`, "hello world!", chromedp.ByQuery),
chromedp.Sleep(time.Second),
chromedp.SetValue(`body>textarea:nth-child(2)`, "hello chromedp!", chromedp.ByQuery),
chromedp.Sleep(3*time.Second),
)
if err != nil {
panic(err)
}
}
The above is the detailed content of chromedp How to select specific textarea from multiple textareas with dynamic names. For more information, please follow other related articles on the PHP Chinese website!
Golang and Python: Understanding the DifferencesApr 18, 2025 am 12:21 AMThe main differences between Golang and Python are concurrency models, type systems, performance and execution speed. 1. Golang uses the CSP model, which is suitable for high concurrent tasks; Python relies on multi-threading and GIL, which is suitable for I/O-intensive tasks. 2. Golang is a static type, and Python is a dynamic type. 3. Golang compiled language execution speed is fast, and Python interpreted language development is fast.
Golang vs. C : Assessing the Speed DifferenceApr 18, 2025 am 12:20 AMGolang is usually slower than C, but Golang has more advantages in concurrent programming and development efficiency: 1) Golang's garbage collection and concurrency model makes it perform well in high concurrency scenarios; 2) C obtains higher performance through manual memory management and hardware optimization, but has higher development complexity.
Golang: A Key Language for Cloud Computing and DevOpsApr 18, 2025 am 12:18 AMGolang is widely used in cloud computing and DevOps, and its advantages lie in simplicity, efficiency and concurrent programming capabilities. 1) In cloud computing, Golang efficiently handles concurrent requests through goroutine and channel mechanisms. 2) In DevOps, Golang's fast compilation and cross-platform features make it the first choice for automation tools.
Golang and C : Understanding Execution EfficiencyApr 18, 2025 am 12:16 AMGolang and C each have their own advantages in performance efficiency. 1) Golang improves efficiency through goroutine and garbage collection, but may introduce pause time. 2) C realizes high performance through manual memory management and optimization, but developers need to deal with memory leaks and other issues. When choosing, you need to consider project requirements and team technology stack.
Golang vs. Python: Concurrency and MultithreadingApr 17, 2025 am 12:20 AMGolang is more suitable for high concurrency tasks, while Python has more advantages in flexibility. 1.Golang efficiently handles concurrency through goroutine and channel. 2. Python relies on threading and asyncio, which is affected by GIL, but provides multiple concurrency methods. The choice should be based on specific needs.
Golang and C : The Trade-offs in PerformanceApr 17, 2025 am 12:18 AMThe performance differences between Golang and C are mainly reflected in memory management, compilation optimization and runtime efficiency. 1) Golang's garbage collection mechanism is convenient but may affect performance, 2) C's manual memory management and compiler optimization are more efficient in recursive computing.
Golang vs. Python: Applications and Use CasesApr 17, 2025 am 12:17 AMChooseGolangforhighperformanceandconcurrency,idealforbackendservicesandnetworkprogramming;selectPythonforrapiddevelopment,datascience,andmachinelearningduetoitsversatilityandextensivelibraries.
Golang vs. Python: Key Differences and SimilaritiesApr 17, 2025 am 12:15 AMGolang and Python each have their own advantages: Golang is suitable for high performance and concurrent programming, while Python is suitable for data science and web development. Golang is known for its concurrency model and efficient performance, while Python is known for its concise syntax and rich library ecosystem.
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.
WebStorm Mac version
Useful JavaScript development tools
SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.
MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.
Atom editor mac version download
The most popular open source editor
