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Replacing Newlines with
in HTML Templates
In HTML templates, replacing newlines (n) with markup (
) can lead to unexpected behavior due to escaping. When the loaded string is passed to the template, newlines are escaped to
, resulting in their display as literal text instead of line breaks.
Solution:
To address this issue, you can preprocess the text prior to using it in the template. Here's how:
Example Code:
<code class="go">import ( "html/template" "os" "strings" ) const page = `<!DOCTYPE html> <html> <head> </head> <body> <p>{{.}}</p> </body> </html>` const text = `first line <script>dangerous</script> last line` func main() { t := template.Must(template.New("page").Parse(page)) safe := template.HTMLEscapeString(text) safe = strings.Replace(safe, "\n", "<br>", -1) t.Execute(os.Stdout, template.HTML(safe)) // Encapsulate as HTML }</code>
This code ensures that any malicious content in the input text is neutralized and allows for proper rendering of newlines using markup.
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