Extract Keywords from String: Javascript

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Lets consider i have a string & want to extract uncommon keywords for SEO. $text = "This is some text. This is some text. Vending Machines are great.";

& Will define a array of common words to ignore keywords in extracted list like $commonWords = ['i','a','about','an','and','are','as','at','be','by','com','de','en','for','from','how','in','is','it','la','of','on','or','that','the','this','to','was','what','when','where','who','will','with','und','the','www'];

Expected output: Result=[some,text,machines,vending]

Would really appreciate if Could any one help us to write generic logic or procedure for the extracting keywords from string?

Some like this

var $commonWords = ['i','a','about','an','and','are','as','at','be','by','com','de','en','for','from','how','in','is','it','la','of','on','or','that','the','this','to','was','what','when','where','who','will','with','und','the','www'];
var $text = "This is some text. This is some text. Vending Machines are great.";

// Convert to lowercase
$text = $text.toLowerCase();

// replace unnesessary chars. leave only chars, numbers and space
$text = $text.replace(/[^\w\d ]/g, '');

var result = $text.split(' ');

// remove $commonWords
result = result.filter(function (word) {
    return $commonWords.indexOf(word) === -1;

// Unique words
result = result.unique();


retextjs/retext-keywords: plugin to extract keywords and key , Module for creating a keyword array from a string and excluding stop words. The substring() method extracts the characters from a string, between two specified indices, and returns the new sub string. This method extracts the characters in a string between "start" and "end", not including "end" itself.

var string = "This is some text. This is some text. Vending Machines are great.";

var substrings = ['your','words', 'here'],

var results = array();
for (var i = substrings.length - 1; i >= 0; --i) {
    if (string.indexOf(substrings[i]) != -1) {
         // str contains substrings[i]

keyword-extractor, An javascript implementation of the Rapid Automated Keyword Extraction (RAKE) Module for creating a keyword array from a string and excluding stop words. In this tutorial, we will learn the difference between string primitives and the String object, how strings are indexed, how to access characters in a string, and common properties and methods used on strings.

This can help ( it supports multi languages):


var sentence = "President Obama woke up Monday facing a Congressional defeat that many in both parties believed could hobble his presidency."

//  Extract the keywords
var extraction_result = keyword_extractor.extract(sentence,{
                                                            remove_digits: true,
                                                            remove_duplicates: false


Top 10 Node.js Keyword Extraction Libraries in 2020, Keyword Extraction API provides professional keyword extractor service which is based on POSTKeyword Extraction for Text X-RapidAPI-HostSTRING. String literals (denoted by double or single quotes) and strings returned from String calls in a non-constructor context (that is, called without using the new keyword) are primitive strings. JavaScript automatically converts primitives to String objects, so that it's possible to use String object methods for primitive strings.

var arrayLength = commonWords.length;
var words = [];   //new array to say the words
for (var i = 0; i < arrayLength; i++) {
    if ($text.indexOf(commonWords[i]) > -1){

Keyword Extraction API Documentation (textanalysis), I recently wrote Topick, a library for extracting keywords from HTML documents. Topick - JavaScript NLP library to extract keywords from HTML generateNamedEntitiesString method to guess keywords or phrases that areĀ  The slice() method extracts parts of a string and returns the extracted parts in a new string. Use the start and end parameters to specify the part of the string you want to extract. The first character has the position 0, the second has position 1, and so on. Tip: Use a negative number to select from the end of the string.

Topick, Keyword extraction helps you find out what's relevant in a sea of unstructured data. Extract keywords or key phrases to discover main topics in your text. The search() method searches a string for a specified value, and returns the position of the match. The search value can be string or a regular expression. This method returns -1 if no match is found. Read more about regular expressions in our RegExp Tutorial and our RegExp Object Reference.

Keyword Extraction: A Guide to Finding Keywords in Text, For example, StandardAnalyzer uses StandardTokenizer to extract tokens from string, pass that through LowerCaseFilter to convert tokens into lower case andĀ  slice() extracts a part of a string and returns the extracted part in a new string. The method takes 2 parameters: the start position, and the end position (end not included). This example slices out a portion of a string from position 7 to position 12 (13-1):

How do you extract keywords from text? Which good NLP tools are , In research & news articles, keywords form an important component since they In this article, we will be extracting keywords from a dataset that ##Convert to list from string Building a Music Game in JavaScript: Part 2. Computing TF-IDF and extracting keywords. Once we have our IDF computed, we are ready to compute TF-IDF and then extract top keywords from the TF-IDF vectors. In this example, we will extract the top keywords for the questions in data/stackoverflow-test.json.