unified

Add support for parsing from markdown.

• @this processor.
• @param Configuration (optional).
• @returns Nothing.

Create a new processor.

• @example This example shows how a new processor can be created (from remark) and linked to stdin(4) and stdout(4).

  import process from 'node:process'
  import concatStream from 'concat-stream'
  import {remark} from 'remark'
  
  process.stdin.pipe(
    concatStream(function (buf) {
      process.stdout.write(String(remark().processSync(buf)))
    })
  )
  

• @returns New unfrozen processor (processor). This processor is configured to work the same as its ancestor. When the descendant processor is configured in the future it does not affect the ancestral processor.

Asynchronously reads the entire contents of a file.

• @param path A path to a file. If a URL is provided, it must use the file: protocol. If a FileHandle is provided, the underlying file will not be closed automatically.
• @param options An object that may contain an optional flag. If a flag is not provided, it defaults to 'r'.

Create a new processor.

• @example This example shows how a new processor can be created (from remark) and linked to stdin(4) and stdout(4).

  import process from 'node:process'
  import concatStream from 'concat-stream'
  import {remark} from 'remark'
  
  process.stdin.pipe(
    concatStream(function (buf) {
      process.stdout.write(String(remark().processSync(buf)))
    })
  )
  

• @returns New unfrozen processor (processor). This processor is configured to work the same as its ancestor. When the descendant processor is configured in the future it does not affect the ancestral processor.

Configure the processor to use a plugin, a list of usable values, or a preset.

If the processor is already using a plugin, the previous plugin configuration is changed based on the options that are passed in. In other words, the plugin is not added a second time.

Note: use cannot be called on frozen processors. Call the processor first to create a new unfrozen processor.

• @example There are many ways to pass plugins to .use(). This example gives an overview:

  import {unified} from 'unified'
  
  unified()
    // Plugin with options:
    .use(pluginA, {x: true, y: true})
    // Passing the same plugin again merges configuration (to `{x: true, y: false, z: true}`):
    .use(pluginA, {y: false, z: true})
    // Plugins:
    .use([pluginB, pluginC])
    // Two plugins, the second with options:
    .use([pluginD, [pluginE, {}]])
    // Preset with plugins and settings:
    .use({plugins: [pluginF, [pluginG, {}]], settings: {position: false}})
    // Settings only:
    .use({settings: {position: false}})
  

• @template {Array} [Parameters=[]]
• @template {Node | string | undefined} [Input=undefined]
• @template [Output=Input]
• @overload
• @overload
• @overload
• @param value Usable value.
• @param parameters Parameters, when a plugin is given as a usable value.
• @returns Current processor.

Add support for parsing from markdown.

• @this processor.
• @param Configuration (optional).
• @returns Nothing.

Parse text to a syntax tree.

Note: parse freezes the processor if not already frozen.

Note: parse performs the parse phase, not the run phase or other phases.

• @param file file to parse (optional); typically string or VFile; any value accepted as x in new VFile(x).
• @returns Syntax tree representing file.

The console module provides a simple debugging console that is similar to the JavaScript console mechanism provided by web browsers.

The module exports two specific components:

• A Console class with methods such as console.log(), console.error() and console.warn() that can be used to write to any Node.js stream.
• A global console instance configured to write to process.stdout and process.stderr. The global console can be used without importing the node:console module.

Warning: The global console object's methods are neither consistently synchronous like the browser APIs they resemble, nor are they consistently asynchronous like all other Node.js streams. See the note on process I/O for more information.

Example using the global console:

console.log('hello world');
// Prints: hello world, to stdout
console.log('hello %s', 'world');
// Prints: hello world, to stdout
console.error(new Error('Whoops, something bad happened'));
// Prints error message and stack trace to stderr:
//   Error: Whoops, something bad happened
//     at [eval]:5:15
//     at Script.runInThisContext (node:vm:132:18)
//     at Object.runInThisContext (node:vm:309:38)
//     at node:internal/process/execution:77:19
//     at [eval]-wrapper:6:22
//     at evalScript (node:internal/process/execution:76:60)
//     at node:internal/main/eval_string:23:3

const name = 'Will Robinson';
console.warn(`Danger ${name}! Danger!`);
// Prints: Danger Will Robinson! Danger!, to stderr

Example using the Console class:

const out = getStreamSomehow();
const err = getStreamSomehow();
const myConsole = new console.Console(out, err);

myConsole.log('hello world');
// Prints: hello world, to out
myConsole.log('hello %s', 'world');
// Prints: hello world, to out
myConsole.error(new Error('Whoops, something bad happened'));
// Prints: [Error: Whoops, something bad happened], to err

const name = 'Will Robinson';
myConsole.warn(`Danger ${name}! Danger!`);
// Prints: Danger Will Robinson! Danger!, to err

• @see source

Prints to stdout with newline. Multiple arguments can be passed, with the first used as the primary message and all additional used as substitution values similar to printf(3) (the arguments are all passed to util.format()).

const count = 5;
console.log('count: %d', count);
// Prints: count: 5, to stdout
console.log('count:', count);
// Prints: count: 5, to stdout

See util.format() for more information.

• @since v0.1.100