What does layui.util do?

The role of layui.util

layui.util is a set of practical tool functions provided in the layui framework, designed to simplify front-end development tasks and improve code readability and maintainability functionality and reusability.

Specific functions include:

Operation arrays and objects

• extend(target, source) : Expand the properties of the source object for the target object
• clone(source, deep): Copy the source object deeply or shallowly
• difference(arr1 , arr2): Get the difference item between two arrays

Date and time operation

• extend(target , source): Expand the properties of the source object for the target object
• clone(source, deep): Deep or shallow copy of the source object
• difference(arr1, arr2): Get the difference item between two arrays

Form operation

• ##valid( form, rules): Verify whether the form fields comply with the rules
• verify(): Customize the form validation rules
• serialize(form): Serialize form data into key-value pairs

Event operation

• on(element, event, callback)：Bind event listener
• off(element, event)：Remove event listener
• bind(callback, context)： Context of binding callback function

Other practical functions

##escape(html)
• : Escape HTML characters
unescape(str)
• : Escape HTML characters
randomNum(min, max)
• : Generate random numbers within the specified range

Usage Example

<code class="javascript">// 扩展对象
layui.util.extend(targetObj, sourceObj);

// 复制对象
const clonedObj = layui.util.clone(obj, true);

// 验证表单
layui.util.valid(form, {
  username: {
    required: true
  }
});

// 为元素绑定单击事件
layui.util.on(element, 'click', function() {
  // ...
});</code>

By using the practical functions provided in layui.util, developers can easily and efficiently handle various common tasks and simplify the front-end development process.

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