Vue selector basics: easily master the application of common selectors

Vue Selector Getting Started Guide: Quickly master the usage of commonly used selectors

Introduction:
Vue, as a modern and efficient JavaScript framework, is widely used Used in front-end development. In Vue, selectors are a very important part. They can help us quickly locate DOM elements to perform corresponding operations. This article will introduce some commonly used Vue selectors and their usage, hoping to help readers better use Vue for development.

1. Use basic selectors
1. Element selector:
This is the simplest selector, you only need to write the tag name. For example, if we want to select all button elements, we can use the following code:

Vue.$(‘button’)

2. Class selector:
The class selector is to add the class attribute to the HTML element and then pass class name to select the corresponding element. For example, the following code will select all elements with the test class:

Vue.$('.test')

3. ID selector:
   The ID selector is done by adding the id attribute to the HTML element and then passing the id name. Select the corresponding element. For example, the following code will select elements with the id myId:

   Vue.$('#myId')

   2. Using advanced selectors
   1. Hierarchical selector:
   Hierarchical selectors allow selection by specifying relationships between elements element. For example, the following code will select all child elements p that are within the parent element div:

   Vue.$('div > p')

   2. Descendant selector:
   The descendant selector allows you to select all descendant elements of a specified element. For example, the following code will select all p elements within the parent element div:

   Vue.$('div p')

   3. Adjacent sibling selector:
   The adjacent sibling selector selects the element immediately following the specified element. For example, the following code will select all elements immediately following the element with id myId:

   Vue.$('#myId + p')

   3. Using attribute selector
   1. Attribute selector:
   Attribute selector allows you to select Select an element by its attribute value. For example, the following code will select all elements with the data-name attribute:

   Vue.$('[data-name]')

   2. Attribute value selector:
   The attribute value selector can select elements based on their attribute values. For example, the following code will select all elements whose data-name attribute value is "test":

   Vue.$('[data-name=test]')

   4. Using pseudo-class selectors
   Pseudo-class selectors are used when the specified element is in a specific state Only then will the element be selected. For example, the following code will select all elements that are hovered by the mouse:

   Vue.$(':hover')

   Summary:
   This article introduces the usage of some commonly used Vue selectors for readers' reference. In the actual development process, it is very important to choose the appropriate selector according to the needs, which can improve the efficiency and maintainability of the code. I hope that readers can use the Vue selector more skillfully through the introduction of this article and bring more convenience and benefits to front-end development work.

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