Raising error on missing keys

[bbl]

Hello!

We're using the default HTML engine middleware. We want to return an error if a variable is not passed as a parameter.
It is possible to configure this behavior with a plain text/template package using the template.Option("missingkey=error") method here.

Is there a way to raise an error if there's no variable defined using Fiber's engine?

[iredmail]

Did a quick check, current fiber html template engine doesn't support specifying options.

Would you like a send a PR for review? (btw, i'm not team member and don't have privilege to review and merge PR.)

• Add a new internal field, e.g. options []string inside type Engine struct {}
• Add a public method for Engine struct to set options. e.g.

type Engine struct {
	// ...

	// options for the template
	// FYI https://pkg.go.dev/html/template#Template.Option
	options []string
}

// Option sets 
func (e *Engine) SetOption(opts []string) {
	return e.options = opts
}

• In method Render():
  • replace return lay.Execute(out, binding) by lay.Option(e.options...).Execute(out, binding).
  • replace return tmpl.Execute(out, binding) by return tmpl.Option(e.options...).Execute(out, binding)