* pinia是什么?
* Pinia官网:Pinia 是 Vue 的存储库,它允许您跨组件/页面共享状态。
* 即数据共享。在使用过pinia后,相信你也会对它爱不释手的,下面我们来聊聊如何安装。
目录
安装pinia
- 来到你的项目文件夹
- 在vscode的终端中执行:npm i pinia -D
- 在 /src/modules文件夹下新建文件 pinia.js
- 写入:
import { createPinia } from "pinia"
const pinia = createPinia()
export default pinia
修改main.js
- 增加:
import pinia from "./modules/pinia"
//...
app.use(pinia)
- 最终main.js文件:
创建stores
- 在 /src文件夹内新建文件夹stores,用来存放状态管理
- 这里我们示例创建一个计数管理,counter.js
- 里面写入:
import { defineStore } from "pinia"
export const useCounterStore = defineStore('counter', {
state() {
return {
num:1
}
},
actions: {
inc() {
++(this.num);
}
}
})
使用counter
- 在你想使用counter的页面中导入并使用,这里以home.vue示例:
<script setup>
import { useCounterStore } from "../stores/counter"
const counter = useCounterStore()
</script>
<template>
<div>这里是home.vue捏</div>
<span>{{counter.num}}</span>
<button @click="counter.inc()">点我</button>
</template>
- home页面效果:
- 进入页面后,计数为1
- 点击按钮时,每点击一次,计数 + 1
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Understanding COSC Certification and Its Importance in Horology
COSC Validation and its Stringent Standards
COSC, or the Official Swiss Chronometer Testing Agency, is the authorized Swiss testing agency that certifies the accuracy and precision of timepieces. COSC accreditation is a symbol of quality craftsmanship and trustworthiness in chronometry. Not all watch brands seek COSC validation, such as Hublot, which instead adheres to its own stringent standards with mechanisms like the UNICO calibre, attaining similar precision.
The Art of Exact Chronometry
The core system of a mechanized watch involves the spring, which supplies energy as it unwinds. This mechanism, however, can be prone to environmental elements that may influence its accuracy. COSC-validated movements undergo rigorous testing—over 15 days in various circumstances (5 positions, 3 temperatures)—to ensure their resilience and dependability. The tests assess:
Typical daily rate precision between -4 and +6 seconds.
Mean variation, maximum variation rates, and impacts of temperature changes.
Why COSC Certification Matters
For timepiece enthusiasts and collectors, a COSC-accredited timepiece isn’t just a piece of technology but a demonstration to enduring quality and accuracy. It signifies a watch that:
Offers outstanding reliability and precision.
Offers guarantee of superiority across the complete construction of the watch.
Is apt to maintain its value better, making it a smart choice.
Well-known Timepiece Brands
Several renowned manufacturers prioritize COSC accreditation for their timepieces, including Rolex, Omega, Breitling, and Longines, among others. Longines, for instance, provides collections like the Record and Soul, which highlight COSC-certified movements equipped with innovative substances like silicone balance springs to improve resilience and performance.
Historical Context and the Evolution of Timepieces
The idea of the timepiece dates back to the requirement for exact chronometry for navigation at sea, highlighted by John Harrison’s work in the 18th century. Since the official establishment of Controle Officiel Suisse des Chronometres in 1973, the accreditation has become a yardstick for assessing the precision of luxury watches, maintaining a tradition of excellence in horology.
Conclusion
Owning a COSC-validated watch is more than an aesthetic choice; it’s a commitment to quality and precision. For those valuing accuracy above all, the COSC certification provides peace of thoughts, ensuring that each certified timepiece will function dependably under various circumstances. Whether for individual contentment or as an investment, COSC-accredited watches stand out in the world of horology, maintaining on a legacy of meticulous timekeeping.
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Understanding COSC Accreditation and Its Importance in Horology
COSC Certification and its Stringent Standards
COSC, or the Controle Officiel Suisse des Chronometres, is the authorized Swiss testing agency that verifies the precision and precision of timepieces. COSC certification is a sign of excellent craftsmanship and trustworthiness in timekeeping. Not all timepiece brands follow COSC validation, such as Hublot, which instead follows to its own strict standards with movements like the UNICO, attaining similar accuracy.
The Art of Exact Chronometry
The central mechanism of a mechanized watch involves the spring, which delivers energy as it loosens. This system, however, can be prone to environmental elements that may influence its accuracy. COSC-certified mechanisms undergo demanding testing—over fifteen days in various conditions (5 positions, 3 temperatures)—to ensure their durability and dependability. The tests evaluate:
Typical daily rate accuracy between -4 and +6 secs.
Mean variation, peak variation levels, and effects of thermal variations.
Why COSC Certification Is Important
For timepiece enthusiasts and connoisseurs, a COSC-accredited watch isn’t just a piece of tech but a testament to lasting excellence and accuracy. It symbolizes a watch that:
Offers outstanding dependability and accuracy.
Ensures assurance of superiority across the entire design of the watch.
Is apt to hold its value better, making it a sound choice.
Famous Chronometer Manufacturers
Several famous brands prioritize COSC accreditation for their timepieces, including Rolex, Omega, Breitling, and Longines, among others. Longines, for instance, offers collections like the Archive and Soul, which showcase COSC-validated movements equipped with innovative materials like silicone equilibrium suspensions to boost resilience and performance.
Historic Context and the Evolution of Chronometers
The concept of the chronometer dates back to the requirement for precise timekeeping for navigation at sea, emphasized by John Harrison’s work in the 18th cent. Since the formal foundation of COSC in 1973, the accreditation has become a standard for judging the precision of luxury timepieces, maintaining a tradition of superiority in horology.
Conclusion
Owning a COSC-accredited watch is more than an aesthetic selection; it’s a dedication to excellence and precision. For those valuing accuracy above all, the COSC validation provides peacefulness of thoughts, ensuring that each certified timepiece will perform dependably under various circumstances. Whether for personal satisfaction or as an investment decision, COSC-validated timepieces distinguish themselves in the world of watchmaking, bearing on a legacy of precise timekeeping.
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