jstrip

jStrip

jStrip is written to run with Node.js and let's you easily grab data from the web - from json, html, array, number or from text and apply multiple filters to change the data to your liking, before it is returned to you asynchronously. jStrip works great with json formats, making json API work a breeze. Also apply jQuery to html pages, locally or from the web.

Use chainable methods and event handlers to enhance jStrip, with new features being added regularly.

To migrate any v1.x code see the Migration section below.

Chuck Norris Random Joke - json api

const jStrip = require("jstrip");

const chuckNJoke = new jStrip();

//display random chuck norris joke
chuckNJoke.on('m1', (d) => {
  let pJson = JSON.parse(d.data);
  console.log(`Chuck Norris Joke: ${pJson.value}`);
});

chuckNJoke.getData("https://api.chucknorris.io/jokes/random")
    .marker("m1").jpretty().show();
    //jpretty layouts json in easy to read format

Check out more Examples below.

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Table of Contents

• Installation
• Chainable Methods
  • first - getData()
  • show()
  • pretty()
  • jpretty()
  • selector()
  • replace()
  • removehtml()
  • uppercase()
  • lowercase()
  • sort()
  • reverse()
  • add()
  • minus()
• Async Event Handler
  • marker()
  • on()
• Migration from v.1.x
  • _jStrip()
• Examples
  • Chuck Norris Random Jokes
  • Live Bitcoin Rates
  • Live Time in New Zealand
  • Text Change
  • Add / Subtract
• Testing
• Versioning
• Getting Involved
  • Issues
  • Contributing
• Authors
• Licence

---

Installation

Install jstrip with npm:

$ npm i -S jstrip

Include jStrip and create an instance.

const jStrip = require('jstrip'); //top of file
...
let jStrip1 = new jStrip();

Chainable Methods

jStrip allows you to append as many filters as you like by simply chaining methods together with a dot delimiter. For example:

jStrip4.getData('https://goo.gl/e234y2').selector("div#rs1")
    .selector("#i_time").pretty()
    .show();  //displays current time in new zealand

First method - .getData( url | text | json | array | number )

The only requirement is to first grab the data. Start by using the .getData() method.

getData() accepts 3 string types: a "url", "text" or json. If a url returns json, the type will become json.

jStrip1.getData("http://www.google.com") // url
//or
jStrip1.getData("my own string of text here!") // string
//or
jStrip1.getData({ name: "New York", high: 47.3, low: 42 }) // json
jStrip1.getData('{ name: "London", high: 30, low: 28.5 }') // json 
                                                //  (as a string)
jStrip.getData(168) // number
//or
jStrip1.getData("http://prices.com/btc/api/data.json") // json

If you use a url the default timeout for the http/s request is 10000 milli-seconds. You can change this per instance by changing the timeout property.

jStrip1.timeout = 15000;
console.log(jStrip1.timeout); // 15000 - 15 seconds

.show()

show() displays the contents to the console. Great for seeing the results, see .marker() and .on() below to add an event handler.

jStrip1.getData("hello world").show()   //hello world

.pretty()

pretty() will format the data it is given. This is great for tidying html, xml or standard text.

jStrip1.getData("hello    world")
    .pretty().show();  // hello world (removes extra spaces)

.jpretty()

Make json data more readable in a key=value layout. jpretty() outputs the json format into an easy to read layout.

const jStrip18 = new jStrip();

jStrip18.on('m1', (d) => {

  let pJson = JSON.parse(d.data); // need to parse the json before
  console.log(`data type: ${d.type}`);//  accessing it's properties
  console.log(`Bitcoin-USD rate: ${pJson.bpi.USD.rate}`);
}); //          .bpi.USD.rate is easy seen from jpretty output

jStrip18.getData("https://api.coindesk.com/v1/bpi/currentprice/gbp.json")
    .marker("m1").jpretty().show();

jpretty().show() console output of json:

{}.bpi.USD.code = USD
{}.bpi.USD.rate = 8,262.8113
{}.bpi.USD.description = United States Dollar
{}.bpi.USD.rate_float = 8262.8113

jpretty() outputs the json into a dot delimited layout of key = value, making it easy to identify its fields and values. Note that jpretty() changes the json into a different format, so any property access using the object must be performed beforehand, as in the example above.

.selector(jquery)

selector() lets you grabs html from the data using jQuery functionality. Check out the many available jQuery selectors you can use.

jStrip1.getData("http://www.news.com")
    .selector("div#top li:nth-child(2)")
    .show(); //2nd li tag inside div with id 'top'

.replace(pattern, text)

Use a regular expression or string pattern to search the jStrip content, followed by the replacement string.

jStrip5.getData('hello world').replace(/hello/,"ki ora")
     .show() // ki ora world

.removehtml()

html elements are stripped out.

jStrip5.getData('<h1hello</h1> <p>world</p>').removehtml()
     .show() // hello world

.uppercase()

convert string contents to upper case.

jStrip5.getData('hello world').uppercase()
     .show() // HELLO WORLD

.lowercase()

convert string contents to lower case.

jStrip5.getData('HELLO WORLD').lowercase()
     .show() // hello world

.sort()

sorts an array, string or url contents into alphabetical / numeric order.

jStrip5.getData([1,5,3,6,2,4]).sort()
     .show() //[ 1, 2, 3, 4, 5 ]

The string / url has a maximum string length of 100 characters.

.reverse()

convert an array, string or url into reverse order.

jStrip5.getData([1,2,3,4,5]).reverse()
     .show() //[ 5, 4, 3, 2, 1 ]

The string / url has a maximum string length of 100 characters.

.add(number)

performs an mathematical addition. The getData value needs to be a number.

jStrip5.getData(1500).add(500)
     .show() // 2000

.minus(number)

performs an mathematical subtraction. The getData value needs to be a number.

jStrip5.getData(1500).minus(500)
     .show() // 1000

Async Event Handlers .marker() and .on()

Grabbing data from the web is not instant, so jStrip caches the filters and provides an event handler to tell you when it has all it's data ready, and send it asynchronously without blocking.

Set a marker (or many) in your jStrip call, simply by using the marker() method and giving it a unique name.

.marker(eventname)

jStrip1.getData("have  a   nice   day")
    .marker("marker1") //            1st marker
    .pretty().marker("marker2"); //  2nd marker

Display the markers asynchronously with the on() event handler. Two parameters are needed: the named marker() to trigger on followed with a function, jStrip returns an object to the function, with 4 properties:

• data - containing the content, as a string
• type - datatype (string | url | json )
• url - url address used if type = 'url', otherwise equals undefined.

.on( marker name, callback fn(returned data) )

jStrip1.on("marker1",(d) => {  //       first marker
  console.log(`html ${d.data}`); //     have  a   nice   day
  console.log(`datatype ${d.type}`); // string
  console.log(`url ${d.url}`); //       undefined as type=string
});

jStrip1.on("marker2",(d) => {  //           second marker
  console.log(`pretty html ${d.data}`);  // have a nice day
});

• The on() event handler(s) should be placed before the marker() is set.

Migrating from Version 1 to Version 2

To keep your v 1.x code working with v 2.x, make these two simple updates to your existing code:

• Create a seperate instance for each jStrip call, with the new operator.

let jStripInstance1 = new jStrip(); //new version 2 way

• Replace your jStrip call with _jStrip():

jStrip("<URL>","<jQuery>")  //older version 1 way

to

jStripInstance1._jStrip("<URL>","<jQuery>") //new version 2 way

That's all!

You can still use Version 1 features together with Version 2.

_jStrip( "url", "jquery" )

_jStrip() returns data via a Promise or as Async/Await.

Using Promises

// Using Promise
jStripInstance1._jStrip('https://www.bing.com', "$('title').html()")
  .then((result) => {
    console.log(`promise result: ${result.data}
      time taken: ${result.timed}
      uri: ${result.uri}
      jquery: ${result.jquery}`);
  })
  .catch((e) => {
    console.log(`Error: ${e}`);
  });

Using Async/Await

// Using Async/Await
const fn = (async () => {
  try {
    const result = await jStripInstance1._jStrip('https://www.youtube.com', "$('title').html()");
    await console.log(`async/await result: ${result.data}
      time taken: ${result.timed}
      uri: ${result.uri}
      jquery: ${result.jquery}`);
  } catch (err) {
    console.log(`error ${err}`);
  }
})();

Examples

Chuck Norris Random Joke - json api

const jStrip = require("jstrip");

const chuckNJoke = new jStrip();

//display random chuck norris joke
chuckNJoke.on('m1', (d) => {
  let pJson = JSON.parse(d.data);
  console.log(`Chuck Norris Joke: ${pJson.value}`);
});

chuckNJoke.getData("https://api.chucknorris.io/jokes/random")
    .marker("m1").jpretty().show();
    //jpretty layouts json in easy to read format

Live Bitcoin Rates - json api

const bitcoinRates = new jStrip();

bitcoinRates.on('m1', (d) => {
  let pJson = JSON.parse(d.data);
  console.log(`  updated: ${pJson.time.updated}
  1 Bitcoin/USD rate: $${pJson.bpi.USD.rate}`);
});

bitcoinRates.getData("https://api.coindesk.com/v1/bpi/currentprice/gbp.json")
    .marker("m1");

Live Time in New Zealand - html

const nzTime = new jStrip();

nzTime.on("nztime", (d) => {
  console.log(`Time in NZ now is: ${d.data}`);
})

nzTime.getData('https://goo.gl/e234y2').selector("div#rs1")
    .selector("#i_time").marker("nztime");

textchange - text

const text = new jStrip();

text.on("txt", (d) => {
  console.log(`text: ${d.data}`);
})

text.getData('<b>hello</b> world.  npm rules!')
    .pretty().show()
    .removehtml().marker("txt")
    .uppercase()..marker("txt")
    .lowercase().show()
    .reverse().marker("txt");

add/subtract - number

const num = new jStrip();

num.on("updateSum", (d) => {
  console.log(`Update Amount: ${d.data}`);
})

num.getData(67895.42).marker("updateSum")
    .minus(75.99).marker("updateSum")
    .minus(32.00).marker("updateSum").show()
    .add(137.50).marker("updateSum")
    .minus(12.95).marker("updateSum");

Tests

Automated CI test builds are run with each update.

Versioning

We use SemVer for versioning.

Get Involved

Issues

If you have an issue, or a bug let us know and we will do our best.

Create an issue here.

Contributing

If you have any questions, comments, suggestions or ideas, feel free to drop me a line. We'd love to hear your suggestions and ideas!

Authors

• Frank C - frankc60

License

This project is licensed under the MIT License.