Question

我正在尝试将这几行基于jQuery的代码转换为vanilla JS，但我正在努力。有人可以解释一下怎么做吗？

  function googletranslate() {
    $(".footer-toggle li, .select-lng li").on("click", function() {
      var rel = $(this).children("a").attr("rel");
      $(".goog-te-menu-frame:first").contents().find(".goog-te-menu2 .goog-te-menu2-item span:contains('" + rel + "')").get(0).click();
    });
  }

  setTimeout(googletranslate, 1000);

我知道如何使用javascript进行点击事件，但我很难找到元素（刚刚开始学习）。

<a href="#" rel="Spanish" title="Spanish">Spanish</a>

基本上，当点击链接时，它会通过rel值将隐藏的谷歌翻译小部件输入，并模拟所需语言的点击。

有人可以解释一下吗？是否更容易使用选择框并从中获取值？

Answer 1

/* ======= Server start ==============================================*/
package main

import (
    "fmt"
    "net"
    "os"
)

func processClients(cfd net.Conn) {
    clientMsg := make([]byte, 128)
    _, err := cfd.Read(clientMsg) // read client msg
    if err != nil {
        return
    }
    clientID := make([]byte, 10)
    _, err = cfd.Read(clientID) // read client id
    if err != nil {
        return
    }

    clientMsg = append(clientMsg, clientID...) // TBD: handle len boundaries
    fmt.Println("Server received msg:", string(clientMsg))

    _, err = cfd.Write(clientMsg[0:len(clientMsg)]) // ack client msg
    if err != nil {
        return
    }
}

func initServer() {
    lfd, err := net.Listen("unix", "/tmp/unix.socket")
    if err != nil {
        fmt.Println("net.Listen error", err)
        return
    }

    defer os.Remove("/tmp/unix.socket")

    fmt.Println("Listening on /tmp/unix.socket")
    for {
        fd, err := lfd.Accept()
        if err != nil {
            fmt.Println("Accept() error", fd)
            break
        }

        go processClients(fd)
    }
}

func main() {
    initServer()
}
/* ======= Server end ===============================================*/ 



/* ======= Client Start ===============================================*/

package main

import (
    "fmt"
    "net"
    "sync"
)

var wg sync.WaitGroup
var clientID int

func sendReq() {
    fd, err := net.Dial("unix", "/tmp/unix.socket")
    if err != nil {
        return
    }
    defer fd.Close()

    clientID++
    id := fmt.Sprintf("%v", clientID)
    _, err = fd.Write([]byte(id)) //send client id
    if err != nil {
        return
    }

    _, err = fd.Write([]byte("Hello there, I am client")) // send client msg
    if err != nil {
        return
    }

    serverMsg := make([]byte, 128)
    _, err = fd.Read(serverMsg) // Read server msg
    if err != nil {
        return
    }
    fmt.Println(string(serverMsg))
    wg.Done()
}

func main() {
    wg.Add(5)
    go sendReq()
    go sendReq()
    go sendReq()
    go sendReq()
    go sendReq()
    wg.Wait()
}
/* ======= Client end ===============================================*/

https://developer.mozilla.org/en-US/docs/Web/API/Document/querySelector

Answer 2

function googletranslate() {
  ['.footer-toggle li', '.select-lng li'].forEach(selector => {
    const elm = document.querySelector(selector);
    elm.addEventListener('click', clickHandler);
  });

  function clickHandler(e) {
    const rel = e.target.querySelector('a').getAttribute('rel');
    const someGoogleSpan = document.querySelector(".goog-te-menu-frame:first")
      .querySelectorAll(".goog-te-menu2 .goog-te-menu2-item span:contains('" + rel + "')")[0];
    someGoogleSpan.click();
  }
}

setTimeout(googletranslate, 1000);

Vanilla Javascript在点击时查找具有属性的元素

2 个答案: