一，代码：
1,controller
func (dc *ArticleController) GetArticle(c *fiber.Ctx) error {// 处理获取文章的逻辑article := new(Article)article.Id = 1article.Title = "三国演义金圣叹批本"article.Author = "罗贯中"user:=c.Query("user")myMap:=fiber.Map{}myMap["Title"] = article.TitlemyMap["Article"] = articlemyMap["UserId"] = userreturn c.Render("article/info", myMap)
}2,view
<!DOCTYPE html>
<html lang="">
<head><meta charset="utf-8"><title>中国古典文学</title>
</head>
<body style="padding: 0;margin: 0;">
<header style="width: 100%;text-align: center;background: #ff00ff;"><span style="font-size:20px;">这里是header</span><span style="float:right;">{{if eq .UserId ""}}
未登录
{{else if eq .UserId "123"}}用户id:123,管理员,欢迎你！
{{else}}用户id:{{.UserId}},欢迎你！
{{end}}</span>
</header>二，测试效果:
用户id为空
用户id不为空
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