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.markdown-body { line-height: 1.75; font-weight: 400; font-size: 15px; overflow-x: hidden; color: rgba(43, 43, 43, 1); font-family: -apple-system, system-ui, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif; background-image: linear-gradient(90deg, rgba(159, 219, 252, 0.15) 3%, rgba(0, 0, 0, 0) 0), linear-gradient(1turn, rgba(159, 219, 252, 0.15) 3%, rgba(0, 0, 0, 0) 0); background-size: 20px 20px; background-position: center }
.markdown-body h1, .markdown-body h2, .markdown-body h3, .markdown-body h4, .markdown-body h5, .markdown-body h6 { padding: 30px 0; margin-top: 35px; margin-bottom: 10px; color: rgba(77, 208, 225, 1) }
.markdown-body h1 { font-size: 30px; text-align: center; position: relative; width: max-content; margin: 0 auto }
.markdown-body h1:before { position: absolute; content: ""; z-index: -1; top: -20px; height: 100%; width: 100px; left: 0; right: 0; margin: 0 auto; background: 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.markdown-body h1:after { position: absolute; content: ""; width: 150%; left: -25%; height: 50%; bottom: 12px; border-radius: 50%; background: linear-gradient(rgba(0, 0, 0, 0) 80%, rgba(77, 208, 225, 0.8)); opacity: 0.6; animation: 6s linear infinite h1animate }
@keyframes h1Animate { 0% { background-position: right bottom } 50% { background-position: right } 100% { background-position: right bottom } }
.markdown-body h2 { display: block; border-bottom: 4px solid rgba(77, 208, 225, 1); position: relative; font-size: 24px; padding: 12px 32px; margin: 30px 0 }
.markdown-body h2:before { width: 24px; height: 24px; left: 0; top: 0; margin: auto; background-size: 24px 24px; background-image: url("data:image/png;base64,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") }
.markdown-body h2:after, .markdown-body h2:before { content: ""; display: block; position: absolute; bottom: 0 }
.markdown-body h2:after { right: 0; width: 400px; height: 10px; border-top-right-radius: 24px; background: linear-gradient(90deg, rgba(255, 255, 255, 1), rgba(77, 208, 225, 1)); max-width: 50vw }
.markdown-body h3 { margin: 30px 0; font-size: 18px; position: relative; padding: 4px 32px; width: max-content }
.markdown-body h3:before { border-bottom: 2px solid rgba(77, 208, 225, 1); width: 100%; content: ""; display: block; height: 28px; position: absolute; left: 0; top: 0; bottom: -2px; margin: auto; background-size: 28px 28px; background-image: url("data:image/png;base64,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"); background-repeat: no-repeat; animation: 2s infinite alternate h3animationbefore }
@keyframes h3AnimationBefore { 0% { width: 28px } 25% { width: 100% } 50% { width: 100% } 100% { width: 100% } }
.markdown-body h3:after { content: ""; display: block; width: 28px; height: 28px; position: absolute; border: 2px solid rgba(77, 208, 225, 1); border-radius: 50%; right: -15px; top: 0; bottom: 0; margin: auto; background-size: 28px 28px; background-image: url("data:image/png;base64,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"); animation: 2s infinite alternate h3animationafter }
@keyframes h3AnimationAfter { 0% { } 10% { } 50% { transform: rotate(-1turn) } 100% { transform: rotate(-1turn) } }
.markdown-body h4 { font-size: 16px }
.markdown-body h5 { font-size: 15px }
.markdown-body h6 { margin-top: 5px }
.markdown-body p { line-height: inherit; margin: 22px 0; letter-spacing: 2px; font-size: 14px; word-spacing: 2px }
.markdown-body img { max-width: 80%; border-radius: 6px; display: block; margin: 20px auto !important; object-fit: contain; box-shadow: 0 0 16px rgba(110, 110, 110, 0.45) }
.markdown-body figcaption { display: block; font-size: 13px; color: rgba(43, 43, 43, 1) }
.markdown-body figcaption:before { content: ""; background-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgBAMAAACBVGfHAAAAGFBMVEVHcExAuPtAuPpAuPtAuPpAuPtAvPxAuPokzOX5AAAAB3RSTlMAkDLqNegkoiUM7wAAAGBJREFUKM9jYBhcgMkBTUDVBE1BeDGqEtXychNUBeXlKEqACsrLQxB8lnCQQClCiWt5OYoSiAIkJVAF5eVBqAqAShTAAs7l5ShKWMwRAmAlSArASpAVgJUkCqIAscESHwCVVjMBK9JnbQAAAABJRU5ErkJggg=="); display: inline-block; width: 18px; height: 18px; background-size: 18px; background-repeat: no-repeat; background-position: center; margin-right: 5px; margin-bottom: -5px }
.markdown-body hr { border-top: 1px solid rgba(77, 208, 225, 1); border-right: none; border-bottom: none; border-left: none; margin-top: 32px; margin-bottom: 32px }
.markdown-body del { color: rgba(77, 208, 225, 1) }
.markdown-body code { border-radius: 2px; overflow-x: auto; background-color: rgba(77, 208, 225, 0.08); color: rgba(38, 198, 218, 1); padding: 0.195em 0.4em }
.markdown-body pre { font-family: Menlo, Monaco, Consolas, Courier New, monospace; overflow: auto; position: relative; line-height: 1.75; box-shadow: 0 0 8px rgba(110, 110, 110, 0.45); border-radius: 4px; margin: 16px }
.markdown-body pre:before { content: ""; display: block; height: 30px; width: 100%; margin-bottom: -7px; background: url("data:image/png;base64,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") 10px 10px / 40px no-repeat }
.markdown-body pre>code { font-size: 12px; padding: 15px 12px; margin: 0; word-break: normal; display: block; overflow-x: auto; color: rgba(51, 51, 51, 1); background: rgba(248, 248, 248, 1) }
.markdown-body a { color: rgba(77, 208, 225, 1); border-bottom: 1px solid rgba(77, 208, 225, 1); font-weight: 400; text-decoration: none; margin: 0 4px }
.markdown-body a:active, .markdown-body a:hover { background-color: rgba(77, 208, 225, 0.1) }
.markdown-body strong { color: rgba(38, 198, 218, 1) }
.markdown-body strong:before { content: "「" }
.markdown-body strong:after { content: "」" }
.markdown-body em { font-style: normal; color: rgba(77, 208, 225, 1); font-weight: 700 }
.markdown-body table { display: inline-block !important; font-size: 12px; width: auto; max-width: 100%; overflow: auto; border: 1px solid rgba(246, 246, 246, 1) }
.markdown-body thead { background: rgba(246, 246, 246, 1); color: rgba(0, 0, 0, 1); text-align: left }
.markdown-body tr:nth-child(2n) { background-color: rgba(77, 208, 225, 0.05) }
.markdown-body td, .markdown-body th { padding: 12px 7px; line-height: 24px }
.markdown-body td { min-width: 120px }
.markdown-body blockquote { margin: 2em 0; padding: 24px 32px; border-left: 4px solid rgba(38, 198, 218, 1); background: rgba(77, 208, 225, 0.15); position: relative }
.markdown-body blockquote:before { content: "❝"; top: 8px; left: 8px; color: rgba(77, 208, 225, 1); font-size: 30px; line-height: 1; font-weight: 700; position: absolute; opacity: 0.7 }
.markdown-body blockquote:after { content: "❞"; font-size: 30px; position: absolute; right: 8px; bottom: 0; color: rgba(77, 208, 225, 1); opacity: 0.7 }
.markdown-body blockquote p { color: rgba(89, 89, 89, 1); line-height: 2 }
.markdown-body ol, .markdown-body ul { color: rgba(89, 89, 89, 1); padding-left: 28px }
.markdown-body ol li, .markdown-body ul li { margin-bottom: 0; list-style: inherit }
.markdown-body ol li .task-list-item, .markdown-body ul li .task-list-item { list-style: none }
.markdown-body ol li .task-list-item ol, .markdown-body ol li .task-list-item ul, .markdown-body ul li .task-list-item ol, .markdown-body ul li .task-list-item ul { margin-top: 0 }
.markdown-body ol ol, .markdown-body ol ul, .markdown-body ul ol, .markdown-body ul ul { margin-top: 3px }
.markdown-body ol li { padding-left: 6px }
@media (max-width: 720px) { .markdown-body h1 { font-size: 24px } .markdown-body h2 { font-size: 20px } .markdown-body h3 { font-size: 18px } }.markdown-body pre, .markdown-body pre>code.hljs { color: rgba(51, 51, 51, 1); background: rgba(248, 248, 248, 1) }
.hljs-comment, .hljs-quote { color: rgba(153, 153, 136, 1); font-style: italic }
.hljs-keyword, .hljs-selector-tag, .hljs-subst { color: rgba(51, 51, 51, 1); font-weight: 700 }
.hljs-literal, .hljs-number, .hljs-tag .hljs-attr, .hljs-template-variable, .hljs-variable { color: rgba(0, 128, 128, 1) }
.hljs-doctag, .hljs-string { color: rgba(221, 17, 68, 1) }
.hljs-section, .hljs-selector-id, .hljs-title { color: rgba(153, 0, 0, 1); font-weight: 700 }
.hljs-subst { font-weight: 400 }
.hljs-class .hljs-title, .hljs-type { color: rgba(68, 85, 136, 1); font-weight: 700 }
.hljs-attribute, .hljs-name, .hljs-tag { color: rgba(0, 0, 128, 1); font-weight: 400 }
.hljs-link, .hljs-regexp { color: rgba(0, 153, 38, 1) }
.hljs-bullet, .hljs-symbol { color: rgba(153, 0, 115, 1) }
.hljs-built_in, .hljs-builtin-name { color: rgba(0, 134, 179, 1) }
.hljs-meta { color: rgba(153, 153, 153, 1); font-weight: 700 }
.hljs-deletion { background: rgba(255, 221, 221, 1) }
.hljs-addition { background: rgba(221, 255, 221, 1) }
.hljs-emphasis { font-style: italic }
.hljs-strong { font-weight: 700 }

碰到的问题

对于npm速度慢的问题,我们可以使用换源的方式提高 npm 的安装速度,

nrm use taobao 已经足够快。

但在安装一些包的时候,还是会表现出假死状态或失败报错。

例如安装 node-sasscypresspuppeteer 等。

(用 npm 或 pnpm 或其他工具都有这个问题)

#原因

这是网络原因,因为这些包需要从 npm 以外的地址下载数据。

所以只有 npm 换源起不到作用。

node-sass

$ npm i --save-dev node-sass
...
> node-sass@4.13.1 install /Users/lc/0Work/temp/test/node_modules/node-sass
> node scripts/install.js Downloading binary from https://github.com/sass/node-sass/releases/download/v4.13.1/darwin-x64-79_binding.node

cypress

$ npm i --save-dev cypress
...
> cypress@4.3.0 postinstall /Users/lc/0Work/temp/test/node_modules/cypress
> node index.js --exec install Installing Cypress (version: 4.3.0) ⠧ Downloading Cypress
Unzipping Cypress
Finishing Installation

puppeteer

$ npm i --save-dev puppeteer
...
> puppeteer@2.1.1 install /Users/lc/0Work/temp/test/node_modules/puppeteer
> node install.js Downloading Chromium r722234 - 116.4 Mb [ ] 1% 536.9s

在这些包的实际文件中,

也果然能够找到关于下载链接或代理的代码。

node-sassnode_modules/node-sass/lib/extensions.js

function getBinaryUrl() {
var site =
getArgument('--sass-binary-site') ||
process.env.SASS_BINARY_SITE ||
process.env.npm_config_sass_binary_site ||
(pkg.nodeSassConfig && pkg.nodeSassConfig.binarySite) ||
'https://github.com/sass/node-sass/releases/download'; return [site, 'v' + pkg.version, getBinaryName()].join(
'/',
);
}

cypressnode_modules/cypress/lib/tasks/download.js

var defaultBaseUrl = 'https://download.cypress.io/';

var getProxyUrl = function getProxyUrl() {
return (
process.env.HTTPS_PROXY ||
process.env.https_proxy ||
process.env.npm_config_https_proxy ||
process.env.HTTP_PROXY ||
process.env.http_proxy ||
process.env.npm_config_proxy ||
null
);
};

puppeteernode_modules/puppeteer/lib/BrowserFetcher.js

const DEFAULT_DOWNLOAD_HOST =
'https://storage.googleapis.com'; const supportedPlatforms = [
'mac',
'linux',
'win32',
'win64',
];
const downloadURLs = {
linux:
'%s/chromium-browser-snapshots/Linux_x64/%d/%s.zip',
mac: '%s/chromium-browser-snapshots/Mac/%d/%s.zip',
win32: '%s/chromium-browser-snapshots/Win/%d/%s.zip',
win64: '%s/chromium-browser-snapshots/Win_x64/%d/%s.zip',
};

那么如果环境访问外网太慢或无法访问外网,

显然就会导致安装太慢或失败。

#解决方法

有几个解决方法:

一是添加 --ignore-scripts 直接无视额外安装脚本,

例如:npm i --save-dev node-sass --ignore-scripts

二是使用对应的镜像源参数,

例如:npm i --save-dev node-sass --sass_binary_site=https://npm.taobao.org/mirrors/node-sass/

这也适用于离线安装的情况,比如指向企业的内网镜像库。

#代理的方法

而个人开发的万金油方法,是使用代理连接到高速服务器,

(也可以指向企业的内网镜像库,实现离线安装)

(以下内容基于 mac,windows 的命令可能不同但原理类似)

在终端中执行:

export http_proxy="http://127.0.0.1:1080"

其中的 http://127.0.0.1:1080 是我们配置的一个内网 proxy,

直接将所有请求转发到(公司的)高速服务器。

(关于 proxy 的配置方式这里不详细说明。)

可以在 ~/.zshrc 里做更详细的处理,

并把代理封装成两个函数作为快捷开关。

bash 或 fish 等其他 shell 类似)

export no_proxy=localhost,127.0.0.1,mysite.com # 白名单

function proxy() {
export http_proxy="http://127.0.0.1:1080" # 改成你自己的地址
export https_proxy="http://127.0.0.1:1080" # 改成你自己的地址
echo "HTTP Proxy on"
} function unproxy() {
unset http_proxy https_proxy # 取消 proxy
echo "HTTP Proxy off"
} proxy # 可以加入这一行实现打开终端直接开启 proxy

这样就生成了 proxyunproxy 两个开关代理的方法。

然后打开新的终端,再尝试安装:

# cd temp/test/
# proxy
npm i --save-dev puppeteer

此时外部文件的下载已经通过高速代理,所以不会再卡住安装。

Downloading Chromium r722234 - 116.4 Mb [======              ] 28% 19.7s

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