Edit

Ignoring Code

Use .prettierignore to ignore (i.e. not reformat) certain files and folders completely.

Use “prettier-ignore” comments to ignore parts of files.

Ignoring Files: .prettierignore

To exclude files from formatting, create a .prettierignore file in the root of your project. .prettierignore uses gitignore syntax.

Example:

# Ignore artifacts:
build
coverage

# Ignore all HTML files:
**/*.html

It’s recommended to have a .prettierignore in your project! This way you can run prettier --write . to make sure that everything is formatted (without mangling files you don’t want, or choking on generated files). And – your editor will know which files not to format!

By default prettier ignores files in version control systems directories (".git", ".jj", ".sl", ".svn" and ".hg") and node_modules (unless the --with-node-modules CLI option is specified). Prettier will also follow rules specified in the ".gitignore" file if it exists in the same directory from which it is run.

So by default it will be

**/.git
**/.svn
**/.hg
**/node_modules

and

**/.git
**/.svn
**/.hg

if --with-node-modules CLI option provided

(See also the --ignore-path CLI option.)

JavaScript

A JavaScript comment of // prettier-ignore will exclude the next node in the abstract syntax tree from formatting.

For example:

matrix(
  1, 0, 0,
  0, 1, 0,
  0, 0, 1
)

// prettier-ignore
matrix(
  1, 0, 0,
  0, 1, 0,
  0, 0, 1
)

will be transformed to:

matrix(1, 0, 0, 0, 1, 0, 0, 0, 1);

// prettier-ignore
matrix(
  1, 0, 0,
  0, 1, 0,
  0, 0, 1
)

JSX

<div>
  {/* prettier-ignore */}
  <span     ugly  format=''   />
</div>

HTML

<!-- prettier-ignore -->
<div         class="x"       >hello world</div            >

<!-- prettier-ignore-attribute -->
<div
  (mousedown)="       onStart    (    )         "
  (mouseup)="         onEnd      (    )         "
></div>

<!-- prettier-ignore-attribute (mouseup) -->
<div
  (mousedown)="onStart()"
  (mouseup)="         onEnd      (    )         "
></div>

CSS

/* prettier-ignore */
.my    ugly rule
{

}

Markdown

<!-- prettier-ignore -->
Do   not    format   this

Range Ignore

available in v1.12.0+

This type of ignore is only allowed to be used in top-level and aimed to disable formatting for auto-generated content, e.g. all-contributors, markdown-toc, etc.

<!-- prettier-ignore-start -->
<!-- SOMETHING AUTO-GENERATED BY TOOLS - START -->

| MY | AWESOME | AUTO-GENERATED | TABLE |
|-|-|-|-|
| a | b | c | d |

<!-- SOMETHING AUTO-GENERATED BY TOOLS - END -->
<!-- prettier-ignore-end -->

YAML

To ignore a part of a YAML file, # prettier-ignore should be placed on the line immediately above the ignored node:

# prettier-ignore
key  : value
hello: world

GraphQL

{
  # prettier-ignore
  addReaction(input:{superLongInputFieldName:"MDU6SXNzdWUyMzEzOTE1NTE=",content:HOORAY}) {
    reaction {content}
  }
}

Handlebars

{{! prettier-ignore }}
<div>
  "hello! my parent was ignored"
  {{#my-crazy-component     "shall"     be="preserved"}}
    <This
      is  =  "also preserved as is"
    />
  {{/my-crazy-component}}
</div>

Command Line File Patterns

For one-off commands, when you want to exclude some files without adding them to .prettierignore, negative patterns can come in handy:

prettier . "!**/*.{js,jsx,vue}" --write

See fast-glob to learn more about advanced glob syntax.