如何遍历go / golang中HTML页面的拼接？

I've looked through online examples and other splice examples, but haven't succeeded.

Here's my HTML

<table style="width:100%">
  <tr>
    <th>Source</th>
    <th>Title</th>
    <th>Author</th>
    <th>URL</th>
  </tr>
  {{range .Arts}}
    <tr>
      <td>{{ .Source }}</td>
      <td>{{ .Title }}</td>
      <td>{{ .Author }}</td>
      <td>{{ .URL }}</td>
    </tr>
  {{end}}  
</table>

GO:

Source string
    Author string
    Title  string
    URL    string
}

type NewsPage struct {
    Header   string
    News     string
    Articles []Article
}

var Arts []Article

func newsDisplayHandler(w http.ResponseWriter, r *http.Request) {
    //  temp := template.Must(template.ParseFiles("layout.html"))
    newsPage := NewsPage{
        Header:   "This is your Mostly Fake news update for " + time.Now().Format("Mon 2006-01-2"),
        News:     "Here's your daily dose of mostly Fake News",
        Articles: Arts}
    parse, _ := template.ParseFiles("newsPage.html")
    parse.Execute(w, newsPage)
    //  temp.Execute(w, newsPage)
}

What am I missing? The rest of my code works and is not the issue here. My issues is that I am not able to loop through my slice to add it to the HTML table. I wont know the number of Articles at run time, as I'm getting the info from an API.

From the code you provided, the array is empty and as the documentation reads:

If the value of the pipeline has length zero, nothing is output;

Your HTML looks fine.

You're also never passing the array:

try:

newsPage := NewsPage{
    Arts: Arts
}

instead of

newsPage := NewsPage{
    Articles: Arts
}