Core Web Vitals Annotations
Annotate a website with the Core Web Vitals
什么是Core Web Vitals Annotations？
Core Web Vitals Annotations是由delambo开发的Chrome扩展程序，该扩展的主要功能是“Annotate a website with the Core Web Vitals”。
扩展截图
下载Core Web Vitals Annotations扩展crx文件
下载Core Web Vitals Annotations扩展crx格式的文件，手动将Chrome插件安装到浏览器中，也可以将crx文件分享给朋友，轻松安装Chrome插件。
扩展使用说明
This extension will overlay annotations onto your website to highlight page attributes that had an impact on the Core Web Vitals performance metrics, First Input Delay (FID), Largest Contentful Paint (LCP) and Cumulative Layout Shift (CLS). It also reports the Core Web Vitals metrics for the page, using Google's recommended color-coded thresholds.
Two types of annotations will be overlaid onto elements of a webpage:
1. Elements that had layout shift and contributed to the Cumulative Layout Shift score. Depending on the severity of the shift, the annotations will be color coded from lowest impact to highest - yellow -> orange -> dark orange -> red. In the upper left hand corner of each annotation you will find the shift score.
2. The element with the Largest Contentful Paint will be highlighted with a dashed purple annotation. It will include the paint time in the upper left hand corner of the annotation.
The extension popup should open a grid with the FID, LCP and CLS metric timings. At the bottom of the popup is a button to remove the annotations from the website.
Except for the Largest Contentful Paint, the Core Web Vitals metrics are user initiated. Take note of the following when you use the plugin and debug your website:
- The First Input Delay is captured after a user clicks or taps a key on the webpage. If you open the extension before one of those actions, then you will notice that the metric is missing from the grid. To get the First Input Delay, close the extension, make a user action on the page, and then reopen.
- Cumulative Layout Shift is an accumulation of shifts on the page. As you scroll through the page, you may see additional shifts and the extension will add new annotations dynamically. The popup grid that reports the total score will also increase as more shifts accrue.
- Cumulative Layout Shift annotations highlight an element that moved, **not the element that caused the shift**. For example, if an ad loads late on the page, it may push some elements below it downward, causing a shift. The elements below the ad will likely be highlighted, and possibly the ad.
- Given the ad example above, multiple elements on the page may have been shifted after the ad loaded. In that case, only one shift score will be recorded, but all of the affected elements will be highlighted with an annotation. In this case, you should see an arrow (↳) next to the annotated shift score which denotes a grouping of elements that shifted together. 扩展基本信息
| 名称 |  Core Web Vitals Annotations |
| ID | gjegofcnbogmeijackegenkifhkgkigi |
| 官方URL | https://chromewebstore.google.com/detail/core-web-vitals-annotatio/gjegofcnbogmeijackegenkifhkgkigi |
| 简介 | Annotate a website with the Core Web Vitals |
| 文件大小 | 191 KB |
| 安装次数 | 2,072 |
| 当前版本 | 0.0.2 |
| 更新时间 | 2021-02-24 |
| 上架时间 | 2021-02-23 |
| 评分 | 5.00/5 共1次评分 |
| 开发者 | delambo |
| 电子邮箱 | [email protected] |
| 付费类型 | free |
| 帮助页面URL | https://github.com/delambo/core-web-vitals-annotations |
| 支持的语言 | en |
| manifest.json | |
{
"update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
"description": "Annotate a website with the Core Web Vitals",
"version": "0.0.2",
"name": "Core Web Vitals Annotations",
"permissions": [
"activeTab"
],
"content_security_policy": "style-src 'self' 'unsafe-inline'; script-src 'self' 'unsafe-eval'; object-src 'self';",
"manifest_version": 2,
"browser_action": {
"default_popup": "popup.html",
"default_icon": {
"128": "images\/logo-128x128.png"
}
},
"icons": {
"16": "images\/logo-16x16.png",
"32": "images\/logo-32x32.png",
"48": "images\/logo-48x48.png",
"128": "images\/logo-128x128.png"
}
} | |
