density.js

Version: 1.1

A class to convert html or text content to keyword density. The output will be like below.

{count: 2, word: "a"}
{count: 2, word: "html"}
{count: 1, word: "heading"}
{count: 1, word: "here"}
{count: 1, word: "is"}
{count: 1, word: "paragraph"}

Features

• Vanilla javascript with no dependencies
• Stopwords - Words to not be included
• Characters - Min number of characters allowed
• Words - Number of words on each row

Setup

Place the script just before </body>.

<script src="density.js"></script>

Usage

Place the code below right below the script tag in the setup.

Example - Simple

const html = `<h1>A html heading</h1><p>Here is a html paragraph</p>`;
const results = density.getSorted(html);
console.log(results);

Output

It will output an array in the console that looks like below.

0: {count: 2, word: "a"}
1: {count: 2, word: "html"}
2: {count: 1, word: "heading"}
3: {count: 1, word: "here"}
4: {count: 1, word: "is"}
5: {count: 1, word: "paragraph"}

Options

Key	Type	Description
characters	int	A minimum number of characters allowed. It's perfect if you need to skip short words.
stopwords	array	To skip words you can use an array of stopwords. Make sure that the stopwords are lowercase.
words	int	The number of words on each row. Sometimes you may need two or three words on each row.
filter	array	In case you have already sanitized the input you can only use the filters you need

or

Key	Type	Description
selected	array	Only make a result of selected keywords

Example - with options

const html = `<h1>A html heading</h1><p>Here is a html paragraph</p>`;
const options = {
  characters: 3,
  words: 2,
  stopwords: ["here is", "a html"],
  filter: ['toText', 'toAlpha', 'toLowercase', 'stripWhitespace']
};
const results = density.getUnsorted(html, options);

console.log(results);

Example - with selected keywords

const html = `<h1>A html heading</h1><p>Here is a html paragraph</p>`;
const options = {
  selected: ['html heading', 'a', 'paragraphen']
};
const results = density.getUnsorted(html, options);

console.log(results);

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License

MIT