故障排除

问题描述：

在安装指导中创建Vue项目时，下载chromedriver时出现异常，如下所示：

# Installing project dependencies ...
# ========================

npm WARN deprecated extract-text-webpack-plugin@3.0.2: Deprecated. Please use https://github.com/webpack-contrib/mini-css-ext
ract-plugin
npm WARN deprecated browserslist@2.11.3: Browserslist 2 could fail on reading Browserslist >3.0 config used in other tools.
npm WARN deprecated bfj-node4@5.3.1: Switch to the `bfj` package for fixes and new features!
npm WARN deprecated flatten@1.0.2: I wrote this module a very long time ago; you should use something else.
npm WARN deprecated json3@3.3.2: Please use the native JSON object instead of JSON 3
npm WARN deprecated browserslist@1.7.7: Browserslist 2 could fail on reading Browserslist >3.0 config used in other tools.
npm WARN deprecated circular-json@0.3.3: CircularJSON is in maintenance only, flatted is its successor.
npm WARN deprecated socks@1.1.10: If using 2.x branch, please upgrade to at least 2.1.6 to avoid a serious bug with socket da
ta flow and an import issue introduced in 2.1.0
npm WARN deprecated left-pad@1.3.0: use String.prototype.padStart()

> chromedriver@2.46.0 install /usr/local/src/testProject/node_modules/chromedriver
> node install.js

/usr/local/src/testProject/node_modules/chromedriver/2.46/chromedriver is not writable: EACCES: permission denied, mkdir '/us
r/local/src/testProject/node_modules/chromedriver/2.46'
/usr/local/src/testProject/node_modules/chromedriver/2.46/chromedriver is not writable: EACCES: permission denied, mkdir '/us
r/local/src/testProject/node_modules/chromedriver/2.46'
Current existing ChromeDriver binary is unavailable, proceding with download and extraction.
Downloading from file:  https://chromedriver.storage.googleapis.com/2.46/chromedriver_linux64.zip
Saving to file: /tmp/2.46/chromedriver/chromedriver_linux64.zip

问题原因：无法正常下载chromedriver。

解决方法：

1. 手动设置npm中下载chromedriver的地址。

   cd /usr/local/src

   npm config set chromedriver_cdnurl https://npm.taobao.org/mirrors/chromedriver

2. 设置完成后，先删除之前未创建成功的Vue项目，之后再创建Vue项目即可。

   rm -rf testProject