How to implement front-end and back-end interaction in layui

There are the following methods for using layui for front-end and back-end interaction: $.ajax method: Simplify asynchronous HTTP requests. Custom request object: allows sending custom requests. Form control: handles form submission and data validation. Upload control: easily implement file upload.

Use layui to achieve front-end and back-end interaction

layui is a popular front-end framework that provides some tools to simplify Interaction with the backend. There are mainly the following ways:

1. Using $.ajax

layui provides a simple $.ajax method to send asynchronous HTTP requests. It encapsulates jQuery's $.ajax method and provides a more friendly API:

layui.use(['jquery'], function($){
  $.ajax({
    url: '/api/get_data',
    success: function(data) {
      console.log(data);
    }
  });
});

2. Using custom requests

layui also allows sending through custom request objects Request:

layui.use(['request'], function(request){
  request.post('/api/save_data', {name: 'layui'})
    .then(function(data){
      console.log(data);
    });
});

3. Use the Form control

layui provides the Form control, which can easily handle form submission and data validation:

<form id="myForm">
  <label>姓名：</label>
  <input name="name">
</form>

<script>
layui.use(['form', 'jquery'], function($, form){
  form.on('submit(submitForm)', function(data){
    $.post('/api/save_user', data.field, function(data){
      console.log(data);
    });
  });
});
</script>

4. Use the Upload control

layui provides the Upload control to easily upload files:

<div class="layui-upload">
  <button type="button" class="layui-btn" id="uploadBtn">上传图片</button>
  <input type="file" name="file" accept="image/*" multiple hidden>
</div>

<script>
layui.use(['upload'], function(upload){
  upload.render({
    elem: '#uploadBtn',
    url: '/api/upload_image',
    done: function(res){
      console.log(res);
    }
  });
});
</script>

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