package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)\h*<(?!(?:h3|ul|p)\b)([^>]+).*?>[\w\W]*?</\1>\s*`)
var str = `<h1>This is heading 1</h1>
<h2 style="color: aqua">This is heading 2</h2>
<h3>This is heading 3</h3>
<p>This is a paragraph.</p>
<p>This is another paragraph.</p>
<a href="https://www.w3schools.com">This is a link</a>
<ul>
<li>Coffee</li>
<li>Tea</li>
<li>Milk</li>
</ul>`
var substitution = ""
fmt.Println(re.ReplaceAllString(str, substitution))
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Golang, please visit: https://golang.org/pkg/regexp/