Vue.js Fundamentals: A Comprehensive Guide
For more advanced usage, refer to the official Vue.js documentation at https://vuejs.org/guide/extras/composition-api-faq.html
Vue Instances
1.1. Creating Vue Instances
Every Vue application begins with creating a new Vue instance using the Vue constructor function:
const app = new Vue({
// Configuration options
})
The constructor accept ...
Posted on Fri, 24 Jul 2026 16:36:13 +0000 by plowter
Restricting el-input to Numeric Values with Decimal Points Only
Element UI provides several validation approaches, yet each prseents limitations. For instance:
Using type='number' allows invalid inputs like 1-1-1.
The el-input-number component permits multiple decimal points.
Regular expressions such as:
<el-input v-model='form.number' @input="(v)=>form.number=v.replace(/[^�-9.]/g,'')&quo ...
Posted on Thu, 23 Jul 2026 17:08:41 +0000 by cshinteractive
Core Vue.js Template Syntax, Reactivity, and Event Handling
Template Interpolation
Interpolation allows inserting dynamic data directly into the DOM structure. It utilizes double curly braces {{ }} containing a JavaScript expression. These expressions have access to all properties defined within the component's data object.
Directives
Directives are special attributes with the v- prefix used to reactive ...
Posted on Tue, 21 Jul 2026 17:04:50 +0000 by aleigh
CSS Inclusion Techniques and the Distinction Between <link> and @import
Four Ways to Bring CSS into an HTML Document
Inline Styles
<span style="color:#ff6600;font-weight:bold">Warning!</span>
Styles are declared directly on the element. This mixes content with presentation and quickly becomes unmaintainable, so it is only suitabel for quick prototyping or one-off overrides.
Embedded Styles
&l ...
Posted on Mon, 20 Jul 2026 17:20:44 +0000 by Neptunus Maris
HTML Document Structure and Core Elements
Document ArchitectureAn HTML element comprises three core parts: the tag itself, its attributes, and the enclosed content.<section class="primary" data-id="main-block">Web Interface</section>The foundational boilerplate of an HTML file dictates the document's language and metadata.<!DOCTYPE html>
<html lang="en-US">
< ...
Posted on Mon, 20 Jul 2026 16:27:34 +0000 by astropirate
Mastering Date and Time Operations in JavaScript
Creating Date Instances
JavaScript provides the built-in Date object to handle time-related data. Instances can be initialized in several ways depending on the required input.
// Current moment
const now = new Date();
// Specific date string
const scheduledTime = new Date("2023-10-05T14:30:00");
// Less common constructors
const leg ...
Posted on Sat, 18 Jul 2026 17:18:27 +0000 by psyion
CSS Float for Web Layouts and Content Wrapping
The float property in CSS shifts an element to the left or right side, allowing surrounding inline content to wrap around it. While originally designed for wrapping text around images, it is widely used for structural layout arrangements.
How Elements Float
A floated item moves horizontally along the current line. It cannot shift vertically. Th ...
Posted on Sat, 18 Jul 2026 16:48:28 +0000 by kendhal
Adding SimpleMemory Theme to a Blog (Frontend Styling)
Note: This guide is for version v2. Verify your theme vertion!
The theme requires JavaScript permissions. Apply for access if needed.
Blog Backend Setup
Access the blog’s management backend (e.g., CNBlogs’ admin panel).
Configuration Page
The following settings are required:
Blog Skin
Code Highlighting
Custom CSS (Page Custom CSS)
Disable De ...
Posted on Sat, 18 Jul 2026 16:00:42 +0000 by spetsacdc
Optimizing Vue List Rendering: The Role of Keys and the Pitfalls of Using Index
The Virtual DOM Diffing Algorithm and PerformanceThe key attribute primarily serves as a performance optimization mechanism for Vue's virtual DOM. During the reconciliation process, Vue matches existing DOM nodes to virtual nodes based on their keys. If an element's key remains identical and its underlying data has not mutated, Vue skips updati ...
Posted on Wed, 15 Jul 2026 16:31:53 +0000 by jscnet
Element UI Common Issues and Solutions
Element UI Common Issues and Solutions
This article documents practical solutions for common problems encountered when working with Element UI in Vue.js applications.
1. el-cascader Cascade Selector
a. Clear Value Programmatically
<el-cascader
ref="regionCascader"
:options="regionOptions"
v-model="sele ...
Posted on Mon, 13 Jul 2026 17:19:24 +0000 by mediabob