feat: add config option to place operators at the beginning of line

[magdalipka]

Description

Added config option to place operators at the beginning of line #3806 .

Defaut option is at the end of line for backward compatibility. User can place operatorPosition: "beginning" to place operators at the beginning of line.

Checklist

• I’ve added tests to confirm my change works.
• (If changing the API or CLI) I’ve documented the changes I’ve made (in the docs/ directory).
• (If the change is user-facing) I’ve added my changes to changelog_unreleased/*/XXXX.md file following changelog_unreleased/TEMPLATE.md.
• I’ve read the contributing guidelines.

✨Try the playground for this PR✨

[17LingShan]

hey, I am new here. I just use prettier@3.0.1 which is the latest version on npm in 7/8/2023. but my code can't be format when I write the .prettierrc.js like this:

module.exports = {
  operatorPosition: 'beginning',
  tabWidth: 2, 
  printWidth: 80, 
  useTabs: false, 
  semi: false, 
  arrowParens: 'avoid',
  singleQuote: true, 
  bracketSpacing: true,
  bracketSameLine: true,
  trailingComma: 'none', 
  operatorPosition: 'beginning',
  overrides: [
    {
      files: '*.json',
      options: {
        printWidth: 140
      }
    }
  ]
}

and my eslint has already set the content:

module.exports = {
...
  rules: {
...
    'operator-linebreak': [2, 'before']
...
  },
...
}

my code still like this:

     let a =
        12312323 +
        324213324 +
        12324324324 +
        312312312111111111111 +
        11111111111111111111 +
        11111111111111111111111111111 +
        1

operatorPosition is not work, is my mistake or a bug?

[magdalipka]

@12ling

hey, I am new here. I just use prettier@3.0.1 which is the latest version on npm in 7/8/2023.

This option has not been merged, you would need to use https://www.npmjs.com/package/@btmills/prettier.