var Node = require('snapdragon-node');
var Snapdragon = require('snapdragon');
var snapdragon = new Snapdragon();

// example usage inside a parser visitor function
snapdragon.parser.set('foo', function() {
  // get the current "start" position
  var pos = this.position();

  // returns the match if regex matches the substring 
  // at the current position on `parser.input`
  var match = this.match(/foo/);
  if (match) {
    // call "pos" on the node, to set the start and end 
    // positions, and return the node to push it onto the AST
    // (snapdragon will push the node onto the correct
    // nodes array, based on the stack)
    return pos(new Node({type: 'bar', val: match[0]}));
  }
});

API#

Node #

Create a new AST Node with the given val and type.

Params

val {String|Object}: Pass a matched substring, or an object to merge onto the node.
type {String}: The node type to use when val is a string.
returns {Object}: node instance

Example

var node = new Node('*', 'Star');
var node = new Node({type: 'star', val: '*'});

.isNode #

Returns true if the given value is a node.

Params

node {Object}
returns {Boolean}

Example

var Node = require('snapdragon-node');
var node = new Node({type: 'foo'});
console.log(Node.isNode(node)); //=> true
console.log(Node.isNode({})); //=> false

.define #

Define a non-enumberable property on the node instance. Useful for adding properties that shouldn't be extended or visible during debugging.

Params

name {String}
val {any}
returns {Object}: returns the node instance

Example

var node = new Node();
node.define('foo', 'something non-enumerable');

.isEmpty #

Returns true if node.val is an empty string, or node.nodes does not contain any non-empty text nodes.

Params

fn {Function}: (optional) Filter function that is called on node and/or child nodes. isEmpty will return false immediately when the filter function returns false on any nodes.
returns {Boolean}

Example

var node = new Node({type: 'text'});
node.isEmpty(); //=> true
node.val = 'foo';
node.isEmpty(); //=> false

.push #

Given node foo and node bar, push node bar onto foo.nodes, and set foo as bar.parent.

Params

node {Object}
returns {Number}: Returns the length of node.nodes

Example

var foo = new Node({type: 'foo'});
var bar = new Node({type: 'bar'});
foo.push(bar);

.unshift #

Given node foo and node bar, unshift node bar onto foo.nodes, and set foo as bar.parent.

Params

node {Object}
returns {Number}: Returns the length of node.nodes

Example

var foo = new Node({type: 'foo'});
var bar = new Node({type: 'bar'});
foo.unshift(bar);

.pop #

Pop a node from node.nodes.

returns {Number}: Returns the popped node

Example

var node = new Node({type: 'foo'});
node.push(new Node({type: 'a'}));
node.push(new Node({type: 'b'}));
node.push(new Node({type: 'c'}));
node.push(new Node({type: 'd'}));
console.log(node.nodes.length);
//=> 4
node.pop();
console.log(node.nodes.length);
//=> 3

.shift #

Shift a node from node.nodes.

returns {Object}: Returns the shifted node

Example

var node = new Node({type: 'foo'});
node.push(new Node({type: 'a'}));
node.push(new Node({type: 'b'}));
node.push(new Node({type: 'c'}));
node.push(new Node({type: 'd'}));
console.log(node.nodes.length);
//=> 4
node.shift();
console.log(node.nodes.length);
//=> 3

.remove #

Remove node from node.nodes.

Params

node {Object}
returns {Object}: Returns the removed node.

Example

node.remove(childNode);

.find #

Get the first child node from node.nodes that matches the given type. If type is a number, the child node at that index is returned.

Params

type {String}
returns {Object}: Returns a child node or undefined.

Example

var child = node.find(1); //<= index of the node to get
var child = node.find('foo'); //<= node.type of a child node
var child = node.find(/^(foo|bar)$/); //<= regex to match node.type
var child = node.find(['foo', 'bar']); //<= array of node.type(s)

.isType #

Return true if the node is the given type.

Params

type {String}
returns {Boolean}

Example

var node = new Node({type: 'bar'});
cosole.log(node.isType('foo'));          // false
cosole.log(node.isType(/^(foo|bar)$/));  // true
cosole.log(node.isType(['foo', 'bar'])); // true

.hasType #

Return true if the node.nodes has the given type.

Params

type {String}
returns {Boolean}

Example

var foo = new Node({type: 'foo'});
var bar = new Node({type: 'bar'});
foo.push(bar);

cosole.log(foo.hasType('qux'));          // false
cosole.log(foo.hasType(/^(qux|bar)$/));  // true
cosole.log(foo.hasType(['qux', 'bar'])); // true

returns {Array}

Example

var foo = new Node({type: 'foo'});
var bar = new Node({type: 'bar'});
var baz = new Node({type: 'baz'});
foo.push(bar);
foo.push(baz);

console.log(bar.siblings.length) // 2
console.log(baz.siblings.length) // 2

returns {Number}

Example

var foo = new Node({type: 'foo'});
var bar = new Node({type: 'bar'});
var baz = new Node({type: 'baz'});
var qux = new Node({type: 'qux'});
foo.push(bar);
foo.push(baz);
foo.unshift(qux);

console.log(bar.index) // 1
console.log(baz.index) // 2
console.log(qux.index) // 0

returns {Object}

Example

var foo = new Node({type: 'foo'});
var bar = new Node({type: 'bar'});
var baz = new Node({type: 'baz'});
foo.push(bar);
foo.push(baz);

console.log(baz.prev.type) // 'bar'

returns {Object}

Example

var foo = new Node({type: 'foo'});
var bar = new Node({type: 'bar'});
var baz = new Node({type: 'baz'});
foo.push(bar);
foo.push(baz);

console.log(bar.siblings.length) // 2
console.log(baz.siblings.length) // 2

returns {Object}: The first node, or undefiend

Example

var foo = new Node({type: 'foo'});
var bar = new Node({type: 'bar'});
var baz = new Node({type: 'baz'});
var qux = new Node({type: 'qux'});
foo.push(bar);
foo.push(baz);
foo.push(qux);

console.log(foo.first.type) // 'bar'

returns {Object}: The last node, or undefiend

Example

var foo = new Node({type: 'foo'});
var bar = new Node({type: 'bar'});
var baz = new Node({type: 'baz'});
var qux = new Node({type: 'qux'});
foo.push(bar);
foo.push(baz);
foo.push(qux);

console.log(foo.last.type) // 'qux'

returns {Object}: The last node, or undefiend

Example

var foo = new Node({type: 'foo'});
var bar = new Node({type: 'bar'});
var baz = new Node({type: 'baz'});
var qux = new Node({type: 'qux'});
foo.push(bar);
foo.push(baz);
foo.push(qux);

console.log(foo.last.type) // 'qux'

Release history#

Changelog entries are classified using the following labels from keep-a-changelog:

added: for new features
changed: for changes in existing functionality
deprecated: for once-stable features removed in upcoming releases
removed: for deprecated features removed in this release
fixed: for any bug fixes

Custom labels used in this changelog:

dependencies: bumps dependencies
housekeeping: code re-organization, minor edits, or other changes that don't fit in one of the other categories.

[2.0.0] - 2017-05-01#

Changed

.unshiftNode was renamed to .unshift
.pushNode was renamed to .push
.getNode was renamed to .find

Added

.isNode
.isEmpty
.pop
.shift
.remove

[0.1.0]#

First release.

About#

breakdance: Breakdance is a node.js library for converting HTML to markdown. Highly pluggable, flexible and easy… more | homepage
snapdragon-capture: Snapdragon plugin that adds a capture method to the parser instance. | homepage
snapdragon-cheerio: Snapdragon plugin for converting a cheerio AST to a snapdragon AST. | homepage
snapdragon-util: Utilities for the snapdragon parser/compiler. | homepage
snapdragon: Easy-to-use plugin system for creating powerful, fast and versatile parsers and compilers, with built-in source-map… more | homepage

Contributing#

Pull requests and stars are always welcome. For bugs and feature requests, please create an issue.

Please read the contributing guide for advice on opening issues, pull requests, and coding standards.

Building docs#

(This project's readme.md is generated by verb, please don't edit the readme directly. Any changes to the readme must be made in the .verb.md readme template.)

To generate the readme, run the following command:

$ npm install -g verbose/verb#dev verb-generate-readme && verb

Running tests#

Running and reviewing unit tests is a great way to get familiarized with a library and its API. You can install dependencies and run tests with the following command:

$ npm install && npm test

Author#

Jon Schlinkert

License#

This file was generated by verb-generate-readme, v0.6.0, on June 25, 2017.

snapdragon-node #

Install#

Usage#

API#

Release history#

[2.0.0] - 2017-05-01#

[0.1.0]#

About#

Related projects#

Contributing#

Building docs#

Running tests#

Author#

License#