foreword
Sometimes it is necessary to format files in batches. At present, prettier is the most widely used. This article records some usage commands
1. Install prettier globally
npm install --global prettier
2. Configure .prettierrc.js
Create a configuration file in the project root directory .prettierrc.js
and fill in the configuration as required
module.exports = {
overrides: [
{
files: ['*.nvue'],
options: {
parser: 'vue',
},
},
],
// 末尾不需要逗号 'es5' none
trailingComma: 'es5',
// 大括号内的首尾需要空格
bracketSpacing: true,
// 行尾需要有分号
semi: false,
// 使用单引号
singleQuote: true,
// 一行最多 100 字符
printWidth: 150,
// 不使用缩进符,而使用空格
//useTabs: false,
// 使用 2 个空格缩进
//tabWidth: 2,
//tabSize: 2,
// 对象的 key 仅在必要时用引号
//quoteProps: 'as-needed',
// jsx 不使用单引号,而使用双引号
//jsxSingleQuote: false,
// jsx 标签的反尖括号需要换行
//jsxBracketSameLine: false,
// 箭头函数,只有一个参数的时候,也需要括号
//arrowParens: 'always',
// 每个文件格式化的范围是文件的全部内容
//rangeStart: 0,
//rangeEnd: Infinity,
// 不需要写文件开头的 @prettier
//requirePragma: false,
// 不需要自动在文件开头插入 @prettier
//insertPragma: false,
// 使用默认的折行标准
//proseWrap: 'preserve',
// 根据显示样式决定 html 要不要折行
//htmlWhitespaceSensitivity: 'css',
// 换行符使用 lf 结尾是 \n \r \n\r auto
//endOfLine: 'lf',
}
3. Commonly used commands
--config .prettierrc.js
It means to use the configuration of .prettierrc.js to format the file,
--write
which means to write permission
3.1 Formatting a single file
prettier --config .prettierrc.js --write ./a/b.js
3.2 Format a certain type of file in a certain folder
prettier --config .prettierrc.js --write ./a/*.js
3.2 Format a certain type of file under multiple folders
prettier --config .prettierrc.js --write ./a/*.js' './b/*.css
3.3 Formatting certain types of files
prettier --config .prettierrc.js --write ./**/**/*.js
3.4 Formatting multiple types of files
prettier --config .prettierrc.js --write ./**/**/*.{js,css,vue}
4. Solve the problem that the file cannot be found
Try adding single quotes to the file address, for exampleprettier --config .prettierrc.js --write './a/b.js'
5. Solve the problem of No parser could be inferred for file
The role in the .prettierrc.js configuration overrides
is to specify that class A files use class B files as parsers. If you encounter a No parser could be inferred for file prompt, you can use overrides to solve it:
overrides: [
{
files: ['*.nvue'],
options: {
parser: 'vue',
},
},
],
For example, the above example means that all nvue files are formatted using the vue analyzer