html-select2

!Last version

> Match & splice a tokenized HTML stream with css selectors. Like html-select but maintained.

Install

``bash
$ npm install html-select2 --save
`

Usage

$3

Given a tokenized stream from
html-tokenize, this program will
print the dt tags matching the selector 'ul > li dt':

` js
const select = require('html-select2')
const tokenize = require('html-tokenize')
const fs = require('fs')
const path = require('path')

const stream = select('ul > li dt', function (e) {
console.log(' MATCH ')
e.createReadStream().on('data', function (row) {
console.log([row[0], row[1].toString()])
})
})

fs
.createReadStream(path.join(__dirname, '/page.html'))
.pipe(tokenize())
.pipe(stream)

stream.resume()
`

The s.resume() is necessary to put the stream into flow mode since we aren't
doing anything with the output of s.

Now this html input:

` html







hello there!

This presentation contains these examples:

• 
  
  browserify
  
  
  node-style require() in the browser
  
  
• 
  
  streams
  
  
  shuffle data around with backpressure
  
  
• 
  
  ndarray
  
  
  n-dimensional matricies on top of typed arrays
  
  
• 
  
  music
  
  
  make music with code
  
  
• 
  
  voxeljs
  
  
  make minecraft-style games in webgl
  
  
• 
  
  trumpet
  
  
  transform html with css selectors and streams
  
  

`

gives this output:

`
MATCH
[ 'open', '

' ]
[ 'text', 'browserify' ]
[ 'close', '

' ]
MATCH
[ 'open', '

' ]
[ 'text', 'streams' ]
[ 'close', '

' ]
MATCH
[ 'open', '

' ]
[ 'text', 'ndarray' ]
[ 'close', '

' ]
MATCH
[ 'open', '

' ]
[ 'text', 'music' ]
[ 'close', '

' ]
MATCH
[ 'open', '

' ]
[ 'text', 'voxeljs' ]
[ 'close', '

' ]
MATCH
[ 'open', '

' ]
[ 'text', 'trumpet' ]
[ 'close', '

' ]
`

$3

Using the same html file from the previous example,
this script converts everything inside dt elements to uppercase:

` js
const select = require('html-select2')
const tokenize = require('html-tokenize')
const through = require('through2')
const fs = require('fs')
const path = require('path')

const stream = select('dt', function (e) {
const tr = through.obj(function (row, buf, next) {
this.push([ row[0], String(row[1]).toUpperCase() ])
next()
})
tr.pipe(e.createStream()).pipe(tr)
})

fs.createReadStream(path.join(__dirname, '/page.html'))
.pipe(tokenize())
.pipe(stream)
.pipe(through.obj(function (row, buf, next) {
this.push(row[1])
next()
}))
.pipe(process.stdout)
`

Running the transform program yields this html output:

` html







hello there!

This presentation contains these examples:

• 
  
  BROWSERIFY
  
  
  node-style require() in the browser
  
  
• 
  
  STREAMS
  
  
  shuffle data around with backpressure
  
  
• 
  
  NDARRAY
  
  
  n-dimensional matricies on top of typed arrays
  
  
• 
  
  MUSIC
  
  
  make music with code
  
  
• 
  
  VOXELJS
  
  
  make minecraft-style games in webgl
  
  
• 
  
  TRUMPET
  
  
  transform html with css selectors and streams
  
  

`

API

` js
const select = require('html-select2')
`

$3

Create a new html selector transform stream sel.

sel expects tokenized html objects
as input and writes tokenized html objects as output.

If selector and cb are given, sel.select(selector, cb) is called
automatically.

$3

Register a callback cb(elem) to fire whenever the css selector string
matches.

$3

Create a readable object mode stream at the selector. The readable stream
contains all the matching tokenized html objects including the element that
matched and its closing tag.

If opts.inner is true, only read the inner content. Otherwrite read the outer
content.

$3

Create a writable object mode stream at the selector. The writable stream writes
into the document stream at the selector, replacing the existing content.

If opts.inner is true, only write to the inner content. Otherwrite write to
the outer content.

$3

Create a duplex object mode stream at the selector. The writable side will write
into the document stream at the selector, replacing the existing content. The
readable side contains the existing content.

If opts.inner is true, only read and write to the inner content. Otherwrite
read and write to the outer content.

$3

Set an attribute named by key to value.

If value is true, the attribute will appear without an equal sign in the
markup.

$3

Remove an attribute named by key.

$3

Return an object with a single attribute value named by key`.

$3

Return an object with all attributes.

$3

#### elem.name

The string name of the tag.

$3

#### elem.on('close', function () {})

When a matched element is closed for reading and writing, this event fires.

Supported CSS Selectors

Internally html-select2 uses cssauron.

License

html-select2 © Kiko Beats, released under the MIT License.

Authored and maintained by Kiko Beats with help from contributors.

> kikobeats.com · GitHub Kiko Beats · Twitter @Kikobeats