15.Eslint检测错误提示及处理

1.Trailing spaces not allowed

解决：把行末空格去除

2.Expected linebreaks to be "LF" but found "CRLF"

解决： .eslintrc.js中增加一条rule :
'linebreak-style': [0, 'error', 'windows']

    'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'off',
    'linebreak-style':[0, 'error', 'windows']

3.Missing semicolon

解决：行末添加分号

4.Missing trailing comma

解决：行末添加逗号

5.Unexpected use of file extension "vue" for "./xxx/****.vue"

解决：去掉后缀名.vue

6.Unexpected use of file extension "js" for "./xxx/****.js"

解决：去掉后缀名.js

7.Unexpected console statement

解决1： .eslintrc.js中增加一条rule :
'no-console':'off'

解决2：改成window.console.log()

8.axios跨域问题
has been blocked by CORS policy: Response to preflight request doesn’t pass access control check: No ‘Access-Control-Allow-Origin’ header is present on the requested resource.

解决：config/index.js中修改以下代码
proxyTable: {
'/fanyiec': { // 任意名字，axios发送请求时使用
target: '真正的URL地址', // 目标接口域名
secure: false,
changeOrigin: true, // 是否跨域
pathRewrite: {
'^/fanyiec': '' // 根据需要自行设定
}
},
cssSourceMap: false
},

9.Unexpected string concatenation

原因：字符串连接时不建议使用+号，而是使用模板字符串

解决：console.log(`Fifteen is ${a + b} and not ${2 * a + b}.`);

注意不是单引号，是撇
模板字符串 - JavaScript | MDN (mozilla.org)