How to define global variables and global methods in vue? (code)
This article introduces to you how to define global variables and global methods in vue? (code), it has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.
1. Global import file
1. First define the common component common.vue
<script>
// 定义一些公共的属性和方法
const httpUrl = 'http://39.105.17.99:8080/'
function commonFun() {
console.log("公共方法")
}
// 暴露出这些属性和方法
export default {
httpUrl,
commonFun
}
</script>
2. Import it where you need to use it
<script>
// 导入共用组件
import global from './common.vue'
export default {
data () {
return {
username: '',
password: '',
// 赋值使用
globalHttpUrl: global.httpUrl
}
},</script>
3. Use
<template>
{{globalHttpUrl}}
</template>
2. Introduce global variables and methods into main.js
1. Define shared components as above
2. Introduce them into main.js and copy them to vue
// 导入共用组件 import global from './common.vue' Vue.prototype.COMMON = global
3. Use
export default {
data () {
return {
username: '',
password: '',
// 赋值使用, 可以使用this变量来访问
globalHttpUrl: this.COMMON.httpUrl
}
},
to summarize the example
common.vue file, the public in the project, or the global file
vue-resource needs to be first Configure main.js
// 配置使用formDate Vue.http.options.emulateHTTP = true Vue.http.options.emulateJSON = true
<script>
// 定义一些公共的属性和方法
const httpUrl = 'http://39.105.17.99:8080/'
function promiseFun (url, params) {
return new Promise((resolve, reject) => {
this.$http.post(this.globalHttpUrl + url, params).then(
(res) => {
resolve(res.json())
},
(err) => {
reject(err.json())
}
)
})
}
// 暴露出这些属性和方法
export default {
httpUrl,
promiseFun
}
</script>
Use
export default {
data () {
return {
username: '',
password: '',
globalHttpUrl: global.httpUrl,
promiseFun: global.promiseFun
}
},
methods: {
loginInFun () {
localStorage.setItem('userId', '00001')
let params = {
telphone: this.username,
password: this.password
}
this.promiseFun('itArtison/user/login', params).then(
(res) => {
console.log(res)
this.$Message.info(res.message)
// 登录成功过以后，这里从初session
// 先将对象转换为json字符串
localStorage.setItem('userInfo', JSON.stringify(res.data))
if (res.code === '0000') {
this.$router.push({'name': 'Home'})
}
},
(err) => {
console.log(err)
this.$Message.info(err.message)
}
)
}
}
Recommended related articles:
Detailed explanation of global variables and global functions defined in the vue project
About Detailed explanation of several methods of defining global variables in VUE
The above is the detailed content of How to define global variables and global methods in vue? (code). For more information, please follow other related articles on the PHP Chinese website!
Python vs. JavaScript: Community, Libraries, and ResourcesApr 15, 2025 am 12:16 AMPython and JavaScript have their own advantages and disadvantages in terms of community, libraries and resources. 1) The Python community is friendly and suitable for beginners, but the front-end development resources are not as rich as JavaScript. 2) Python is powerful in data science and machine learning libraries, while JavaScript is better in front-end development libraries and frameworks. 3) Both have rich learning resources, but Python is suitable for starting with official documents, while JavaScript is better with MDNWebDocs. The choice should be based on project needs and personal interests.
From C/C to JavaScript: How It All WorksApr 14, 2025 am 12:05 AMThe shift from C/C to JavaScript requires adapting to dynamic typing, garbage collection and asynchronous programming. 1) C/C is a statically typed language that requires manual memory management, while JavaScript is dynamically typed and garbage collection is automatically processed. 2) C/C needs to be compiled into machine code, while JavaScript is an interpreted language. 3) JavaScript introduces concepts such as closures, prototype chains and Promise, which enhances flexibility and asynchronous programming capabilities.
JavaScript Engines: Comparing ImplementationsApr 13, 2025 am 12:05 AMDifferent JavaScript engines have different effects when parsing and executing JavaScript code, because the implementation principles and optimization strategies of each engine differ. 1. Lexical analysis: convert source code into lexical unit. 2. Grammar analysis: Generate an abstract syntax tree. 3. Optimization and compilation: Generate machine code through the JIT compiler. 4. Execute: Run the machine code. V8 engine optimizes through instant compilation and hidden class, SpiderMonkey uses a type inference system, resulting in different performance performance on the same code.
Beyond the Browser: JavaScript in the Real WorldApr 12, 2025 am 12:06 AMJavaScript's applications in the real world include server-side programming, mobile application development and Internet of Things control: 1. Server-side programming is realized through Node.js, suitable for high concurrent request processing. 2. Mobile application development is carried out through ReactNative and supports cross-platform deployment. 3. Used for IoT device control through Johnny-Five library, suitable for hardware interaction.
Building a Multi-Tenant SaaS Application with Next.js (Backend Integration)Apr 11, 2025 am 08:23 AMI built a functional multi-tenant SaaS application (an EdTech app) with your everyday tech tool and you can do the same. First, what’s a multi-tenant SaaS application? Multi-tenant SaaS applications let you serve multiple customers from a sing
How to Build a Multi-Tenant SaaS Application with Next.js (Frontend Integration)Apr 11, 2025 am 08:22 AMThis article demonstrates frontend integration with a backend secured by Permit, building a functional EdTech SaaS application using Next.js. The frontend fetches user permissions to control UI visibility and ensures API requests adhere to role-base
JavaScript: Exploring the Versatility of a Web LanguageApr 11, 2025 am 12:01 AMJavaScript is the core language of modern web development and is widely used for its diversity and flexibility. 1) Front-end development: build dynamic web pages and single-page applications through DOM operations and modern frameworks (such as React, Vue.js, Angular). 2) Server-side development: Node.js uses a non-blocking I/O model to handle high concurrency and real-time applications. 3) Mobile and desktop application development: cross-platform development is realized through ReactNative and Electron to improve development efficiency.
The Evolution of JavaScript: Current Trends and Future ProspectsApr 10, 2025 am 09:33 AMThe latest trends in JavaScript include the rise of TypeScript, the popularity of modern frameworks and libraries, and the application of WebAssembly. Future prospects cover more powerful type systems, the development of server-side JavaScript, the expansion of artificial intelligence and machine learning, and the potential of IoT and edge computing.
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft
SublimeText3 Chinese version
Chinese version, very easy to use
Dreamweaver Mac version
Visual web development tools
mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
Atom editor mac version download
The most popular open source editor
