![]() Put the > of a multi-line HTML (HTML, JSX, Vue, Angular) element at the end of the last line instead of being alone on the next line (does not apply to self closing elements). Print spaces between brackets in object literals. Trailing commas in type parameters in TypeScript and Flow. "es5" - Trailing commas where valid in ES5 (objects, arrays, etc.).This also enables trailing commas in type parameters in TypeScript (supported since TypeScript 2.7 released in January 2018). To run, JavaScript code formatted this way needs an engine that supports ES2017 (Node.js 8+ or a modern browser) or downlevel compilation. "all" - Trailing commas wherever possible (including function parameters and calls).(A single-line array, for example, never gets trailing commas.) Print trailing commas wherever possible in multi-line comma-separated syntactic structures. Defaultĭefault value changed from es5 to all in v3.0.0 Use single quotes instead of double quotes in JSX. This effectively allows using the json5 parser for “JSON with comments and trailing commas”. If this option is set to preserve, singleQuote to false (default value), and parser to json5, double quotes are always used for strings. Also Prettier doesn’t unquote numeric properties for Vue (see the issue about that). Note that Prettier never unquotes numeric property names in Angular expressions, TypeScript, and Flow because the distinction between string and numeric keys is significant in these languages. "preserve" - Respect the input use of quotes in object properties."consistent" - If at least one property in an object requires quotes, quote all properties."as-needed" - Only add quotes around object properties where required.DefaultĬhange when properties in objects are quoted. See the strings rationale for more information. If the number of quotes outweighs the other quote, the quote which is less used will be used to format the string - Example: "I'm double quoted" results in "I'm double quoted" and "This \"example\" is single quoted" results in 'This "example" is single quoted'.JSX quotes ignore this option – see jsx-single-quote.Use single quotes instead of double quotes. false - Only add semicolons at the beginning of lines that may introduce ASI failures.true - Add a semicolon at the end of every statement.Print semicolons at the ends of statements. This behavior is known as SmartTabs.) Semicolons (Tabs will be used for indentation but Prettier uses spaces to align things, such as in ternaries. ![]() editorconfig file will configure Prettier’s tab usage, unless overridden. Indent lines with tabs instead of spaces. editorconfig file will configure Prettier’s tab width, unless overridden. Specify the number of spaces per indentation-level. ![]() (If you don’t want line wrapping when formatting Markdown, you can set the Prose Wrap option to disable it.) Tab Width editorconfig file will configure Prettier’s print width, unless overridden. max-len just says what the maximum allowed line length is, but not what the generally preferred length is – which is what printWidth specifies. In other words, don’t try to use printWidth as if it was ESLint’s max-len – they’re not the same. You need to explicitly tell them what to do, while humans can make their own (implicit) judgements, for example on when to break a line. Prettier will make both shorter and longer lines, but generally strive to meet the specified printWidth. It is a way to say to Prettier roughly how long you’d like lines to be. It is not the hard upper allowed line length limit. Prettier’s printWidth option does not work the same way. In practice, the average line length often ends up well below the maximum. Developers often use whitespace to break up long lines for readability. However, when humans write code, they don’t strive to reach the maximum number of columns on every line. In code styleguides, maximum line length rules are often set to 100 or 120. Specify the line length that the printer will wrap on.įor readability we recommend against using more than 80 characters: false - Retain the default behavior of ternaries keep question marks on the same line as the consequent.true - Use curious ternaries, with the question mark after the condition.Try prettier's new ternary formatting before it becomes the default behavior. This way the Prettier CLI, editor integrations and other tooling knows what options you use. If you change any options, it’s recommended to do it via a configuration file. To learn more about Prettier’s stance on options – see the Option Philosophy. ![]() Prettier ships with a handful of format options.
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