go template alternating design between rows-CodePudding

I have a simple template fetching a list of blog posts:

<div >
    <div >
        {{range .Pages}}

        <p >
            <a href="{{.Slug}}">{{.Title}} </a>
        </p>

        {{end}}
        <br />
        <br />
        <br />
    </div>
</div>

I would like to alternate the design between posts e.g. the first will use a certain

class like

and the second record (or even and odd records if you prefer) another p e.g.

thank you!

CodePudding user response：

I suggest solving this with CSS to save yourself some trouble. You can use odd or even in nth-child:

.dalogue:nth-child(odd) {
    // CSS Property   
}

Alternatively, you can use the index of the items. Below, I am using the modulo operator to determine if it's odd or even.

{{ range $index, $page := .Pages }}
 {{ if eq (mod $index 2) 0 }} odd {{ else }} even {{ end }}
{{end}}

Note, I am switching odd and even around. Because the index starts at 0 and not at 1. But when looking at a table, you start counting at 1 and this is also how CSS would behave.

I have implemented the mod function myself using template.Funcs.

t.Funcs(map[string]any{"mod": func(a, b int) int { return a % b }})

https://go.dev/play/p/aAupH-4CugV