How to adjust form size using golang-Golang-php.cn

How to adjust form size using golang

PHPz

Release： 2023-03-30 09:45:17

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When writing a form in golang, sometimes you need to adjust the size of the form. How to achieve this? This article will introduce it to you.

Using CSS

In front-end development, we usually use CSS to style the form. In golang, we can set the style of the form through "style" in the "html/template" package. Here is an example:

// 定义模板
tmpl := `<html><head><style>.my-form { width: 500px; height: 600px; }</style></head><body><form class="my-form">{{.}}</form></body></html>`
// 填充模板
t := template.Must(template.New("mytemplate").Parse(tmpl))
// 设置表单数据
form := "这里是表单内容"
// 输出结果
t.Execute(w, template.HTML(form))

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In the above example, we use CSS to set the width of the form to 500px and the height to 600px. It should be noted that we use "{{.}}" in the template to indicate inserting form data.

Using JavaScript

If you need to dynamically set the form size in golang, we can use JavaScript. First, introduce the JavaScript file into the template:

tmpl := `<html><head><script src="/static/js/my-js.js"></script></head><body><form>{{.}}</form></body></html>`
t := template.Must(template.New("mytemplate").Parse(tmpl))
form := "这里是表单内容"
t.Execute(w, template.HTML(form))

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Then, set the form size in the JavaScript file:

var form = document.getElementsByTagName("form")[0];
form.style.width = "500px";
form.style.height = "600px";

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In the above example, we first get the first form element, and then Use "style" to set the width of the form to 500px and the height to 600px.

Using Bootstrap

Bootstrap is a popular front-end framework that provides many CSS and JavaScript components for form layout and styling. If you want to create beautiful forms quickly, use Bootstrap.

First, you need to introduce the Bootstrap file into the template:

tmpl := `<html><head><link rel="stylesheet" href="/static/css/bootstrap.min.css"><script src="/static/js/bootstrap.min.js"></script></head><body>{{.}}</body></html>`
t := template.Must(template.New("mytemplate").Parse(tmpl))
form := "这里是表单内容"
t.Execute(w, template.HTML(form))

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Then, you can use the "container-fluid" and "row" classes provided by Bootstrap to create a responsive form layout . Here is an example:

<form>
  <div class="container-fluid">
    <div class="row">
      <div class="col-md-6 col-sm-12">
        <input type="text" class="form-control" placeholder="请输入您的姓名">
      </div>
      <div class="col-md-6 col-sm-12">
        <input type="text" class="form-control" placeholder="请输入您的电话号码">
      </div>
    </div>
  </div>
</form>

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In the above example, we created a responsive form layout using the "container-fluid" and "row" classes. Use the "col-md-6" and "col-sm-12" classes to layout form elements on different devices.

Summary:

The above are three ways to set the form size in golang. You can choose the method that suits you to adjust. Using CSS is relatively simple, but style conflicts sometimes occur; using JavaScript can dynamically adjust the size of the form, but you need to write some extra code; using Bootstrap can quickly create beautiful forms, but you need to learn some new knowledge. I hope this article can help you better use golang to write forms.

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