GoQuery is a library for Go (Golang) that brings a syntax and a set of features similar to jQuery to the Go language. It is primarily used for web scraping and for working with HTML documents.
To select the nth-child of an element using GoQuery, you can use the CSS pseudo-class :nth-child(n) within the Find method. The nth-child pseudo-class matches elements based on their position among a group of siblings.
Here is an example of how to use GoQuery to select the nth-child of an element:
package main
import (
"fmt"
"log"
"github.com/PuerkitoBio/goquery"
"net/http"
)
func main() {
// Example HTML document
html := `<html>
<head>
<title>GoQuery nth-child Example</title>
</head>
<body>
<div id="parent">
<p>First child</p>
<p>Second child</p>
<p>Third child</p>
<p>Fourth child</p>
</div>
</body>
</html>`
// Create a new document from the HTML string
doc, err := goquery.NewDocumentFromReader(strings.NewReader(html))
if err != nil {
log.Fatal("Error loading HTTP response body. ", err)
}
// Use the CSS selector to find the second child of the div with id "parent"
nthChild := 2
selector := fmt.Sprintf("#parent p:nth-child(%d)", nthChild)
doc.Find(selector).Each(func(i int, s *goquery.Selection) {
// For each element found, print the text
fmt.Println(s.Text())
})
}
In this example, we are selecting the second <p> element that is a child of the <div> element with the id parent. The nthChild variable is used to define which child we are interested in. The Find method is used to apply the CSS selector, and the Each method iterates over the selection, allowing us to print the text of each element found.
To run GoQuery, you need to have Go installed on your system and the GoQuery package downloaded, which you can get using the following command:
go get github.com/PuerkitoBio/goquery
Please replace the html variable with the actual HTML content you're working with or load the HTML from a web request if you're scraping a live website.
