DOM Utilities

This package provides various utilities that makes working with dom much easier.

Installation

yarn add @mongez/dom

npm i @mongez/dom

Usage

Let's start with handling With metadata.

Setting Page title

import { setTitle } from "@mongez/dom";

setTitle("Hello World");

This function modifies the page title, along with adding meta[og:title] meta[witter:title] and meta[itemprop="name"] meta tags.

Outputs:

<title>Hello World</title>

<meta property="og:title" content="Hello World" />
<meta property="og:image:alt" content="Hello World" />
<meta property="twitter:title" content="Hello World" />
<meta property="twitter:image:alt" content="Hello World" />
<meta itemprop="name" content="Hello World" />

Setting Page Description

import { setDescription } from "@mongez/dom";

setDescription("Hello World Page Description from other realms.");

This function modifies the page meta description, along with adding meta[og:description] meta[witter:description] and meta[itemprop="description"] meta tags.

Outputs:

<meta
  name="description"
  content="Hello World Page Description from other realms."
/>
<meta
  property="og:description"
  content="Hello World Page Description from other realms."
/>
<meta
  property="twitter:description"
  content="Hello World Page Description from other realms."
/>
<meta
  itemprop="name"
  content="Hello World Page Description from other realms."
/>

Setting Page keywords

import { setKeywords } from "@mongez/dom";

setKeywords("hello,world,from,other,worlds");
// can also be sent as an array
setKeywords(["hello", "world", "from", "other", "worlds"]);

This function modifies the page meta keywords.

Outputs:

<meta name="keywords" content="hello,world,from,other,worlds." />

Setting Canonical Url

import { setCanonicalUrl } from "@mongez/dom";

setCanonicalUrl("https://site-name.com/page-url-path");

This function sets the page Canonical Url.

Outputs:

<link rel="canonical" href="https://site-name.com/page-url-path" />
<meta property="og:url" href="https://site-name.com/page-url-path" />

Setting Page image

import { setImage } from "@mongez/dom";

setImage("https://site-name.com/page-image.png");

This function sets the page current image that can be used for page preview, it modifies meta.image meta[og:image] meta[witter:image] and meta[itemprop="image"] meta tags.

Outputs:

<meta property="image" content="https://site-name.com/page-image.png" />
<meta property="og:image" content="https://site-name.com/page-image.png" />
<meta property="twitter:image" content="https://site-name.com/page-image.png" />
<meta itemprop="image" content="https://site-name.com/page-image.png" />

Setting Page Favicon

import { setFavIcon } from "@mongez/dom";

setFavIcon("https://site-name.com/favicon.ico");

Outputs:

<link rel="icon" href="https://site-name.com/favicon.ico" />

Setting Page Color

Setting the page color is useful when working with mobile apps as it changes the header background.

import { setPageColor } from "@mongez/dom";

setPageColor("#000");

Outputs:

<meta name="theme-color" content="#000" />

Set Element Attributes

This will allow you to set attributes to any DOM Element by passing plain objects of element in second element.

import { setElementAttributes } from "@mongez/dom";

const anchor = document.getElementById("my-anchor");

setElementAttributes(anchor, {
  id: "new-id",
  href: "https://google.com",
  target: "_blank",
});

Setting HTML Attributes

import { setHTMLAttributes } from "@mongez/dom";

setHTMLAttributes({
  lang: "en",
  dir: "ltr",
  app: "MyApp",
});

Outputs:

<html lang="en" dir="ltr" app="MyApp">
  ...
</html>

Get Element Attributes

Get element attributes list using getElementAttributes

import { getElementAttributes } from "@mongez/dom";

console.log(getElementAttributes(document.documentElement));

Based on previous example it will be something like:

{
  "lang": "en",
  "dir": "ltr",
  "app": "MyApp"
}

Combine meta data in one function

You can set most of the meta data in just one function called setPageMeta

import { setPageMeta } from "@mongez/dom";

setPageMeta({
  title: "Page Title",
  description: "Page Description",
  keywords: "page, keywords, list",
  image: "page image path",
  url: "page url",
  favIcon: "Page favicon",
  color: "Page color",
  type: "website",
});

Full list of the page meta as follows:

type MetaData = {
  /**
   * Set page title
   */
  title?: string;
  /**
   * Set page meta description
   */
  description?: string;
  /**
   * Set page meta image
   */
  image?: string;
  /**
   * Set page meta keywords
   */
  keywords?: string | string[];
  /**
   * Set page meta Canonical url
   */
  url?: string;
  /**
   * Set page meta fav icon
   */
  favIcon?: string;
  /**
   * Set page meta color
   */
  color?: string;
  /**
   * Page type, usually sets with og:type
   */
  type?:
    | "website"
    | "article"
    | "profile"
    | "book"
    | "music"
    | "video"
    | string;
};

Get current meta data

To get the current stored meta data, use getMetaData function.

import { getMetaData } from "@mongez/dom";

getMetaData("title"); // returns the current title

To get the entire meta data object, do not pass any arguments to the function.

import { getMetaData } from "@mongez/dom";

getMetaData(); // returns {title: 'some-title', color: null,...}

Detects if user's device is in dark mode

import { userPrefersDarkMode } from "@mongez/dom";

if (userPrefersDarkMode()) {
  // switch your style to dark mode
}

Scroll to element

This will make the browser scrolls to the given element selector with smooth scroll.

import { scrollTo } from "@mongez/dom";

scrollTo("#my-element");

Append Javascript File

import { loadScript } from "@mongez/dom";

loadScript("https://site-name.com/js-file.js", () => {
  // do something when file is loaded
});

Sanitizing HTML to text

Sometimes its useful to get only the text from html code.

import { htmlToText } from "@mongez/dom";

htmlToText("<h1>Hello World</h1>"); // Hello World

User keyboard detection

The pressed function will allow you to check if the user has pressed on certain keys on keyboard with readable code.

For demonstration purposes, the following example will be used with React JS.

import { pressed, ESC_KEY, ENTER_KEY, TAB_KEY, CONTROL_KEY } from "@mongez/dom";

export default function MyInput() {
  const detectUserInput = (e) => {
    if (pressed(e, ESC_KEY)) {
      // user pressed on escape key
    } else if (pressed(e, ENTER_KEY)) {
      // user pressed on enter key
    } else if (pressed(e, CONTROL_KEY)) {
      // user pressed on control key
    } else if (pressed(e, TAB_KEY)) {
      // user pressed on tab key
    }
  };

  return <input onChange={detectUserInput} />;
}

Stylesheet

You may update or generate a new stylesheet link tag using styleSheet utility, this will generate a new link and append it to the head tag.

import { styleSheet } from "@mongez/dom";

styleSheet(
  "https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css"
);

This will generate a new link with a generated random id added as an attribute to that link tag, so the output would be something like:

output:

<link
  rel="stylesheet"
  id="link-2597813"
  href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css"
/>

You may specify the id attribute as second value, the function will search for that id, if found then it will replace the href attribute only.

import { styleSheet } from "@mongez/dom";

// Bootstrap 5
styleSheet(
  "https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css",
  "ui-framework-cdn"
); // generates a new link tag

output:

<link
  rel="stylesheet"
  id="ui-framework-cdn"
  href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css"
/>

You can replace the href link tag again with same id but different href.

import { styleSheet } from "@mongez/dom";

// Bootstrap 5
styleSheet(
  "https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css",
  "ui-framework-cdn"
); // generates a new link tag

// Only update the link href attribute to Semantic ui
styleSheet(
  "https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.4.1/semantic.min.css",
  "ui-framework-cdn"
); // generates a new link tag

Output:

<link
  rel="stylesheet"
  id="ui-framework-cdn"
  href="https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.4.1/semantic.min.css"
/>

Google fonts

Another similar to styleSheet feature is using googleFont utility, this will generate a link html tag with a preconnect attribute.

Second argument also accepts an id.

import { googleFont } from "@mongez/dom";

// Roboto Font
googleFont("https://fonts.googleapis.com/css2?family=Roboto", "primary-font");
// Open Sans Font
googleFont(
  "https://fonts.googleapis.com/css2?family=Open+Sans",
  "secondary-font"
);

This will generate the following tags:

<link rel="preconnect" href="https://fonts.googleapis.com/" />
<link rel="preconnect" href="https://fonts.gstatic.com/" crossorigin="" />
<link
  rel="stylesheet"
  id="primary-font"
  href="https://fonts.googleapis.com/css2?family=Roboto"
/>
<link
  rel="stylesheet"
  id="secondary-font"
  href="https://fonts.googleapis.com/css2?family=Open+Sans"
/>

For more information about adding these two additional tags, please read this article.

The preconnect tags will be generated only once with the first call of googleFont function.

Load Font

Added in V1.1.0

The loadFont function allows you to load font either externally or internally, but it's highly used with internally fonts.

Usage

import { loadFont } from "@mongez/dom";
import lightFontWoff from "./fonts/font-light.woff";
import lightFontWoff2 from "./fonts/font-light.woff2";
import fontWoff from "./fonts/font.woff";
import fontWoff2 from "./fonts/font.woff2";

loadFont({
  name: "base-font",
  weights: [
    {
      weight: "light",
      woff: lightFontWoff,
      woff2: lightFontWoff2,
    },
    {
      weight: "normal",
      woff: fontWoff,
      woff2: fontWoff2,
    },
  ],
});

Allowed font files extensions are: woff, woff2, eot , ttf, otf and svg.

If you're not sure what is the type of the font you may just pass src to the weight object.

import { loadFont } from "@mongez/dom";
import lightFont from "./fonts/lightFont.ttf";
import normalFont from "./fonts/font.ttf";

loadFont({
  name: "base-font",
  weights: [
    {
      weight: "light",
      src: lightFont,
    },
    {
      weight: "normal",
      src: normalFont,
    },
  ],
});

If all font weights is in one file, just pass the src directly to the function.

import { loadFont } from "@mongez/dom";
import font from "./fonts/font.ttf";

loadFont({
  name: "base-font",
  src: font,
});

You can also set the font src as url as well.

Any other font style can be passed as well to the font face descriptors.

When adding single font file the loadFont object can be like this:

type FontOptions = {
  /**
   * Font family name
   */
  name: string;
  /**
   * font src path
   */
  src?: string;
  /**
   * Font face descriptors
   */
  descriptors?: FontFaceDescriptors;
};

When adding multiple weights, the loadFont accepts the following features

type FontWeightSetup = FontFaceDescriptors & {
  /**
   * Font url, a generic url, can be added exactly as in the font-family `src` property.
   */
  src?: string;
  /**
   * Font url for woff (Web Open Font Format)
   */
  woff?: string;
  /**
   * Font url for woff2 (Web Open Font Format 2)
   */
  woff2?: string;
  /**
   * Font url for true type
   */
  ttf?: string;
  /**
   * Font url for eot (embedded-open type font)
   */
  eot?: string;
  /**
   * Font url for svg (vector-data)
   */
  svg?: string;
  /**
   * Font url for otf (open type font)
   */
  otf?: string;
};

type FontOptions = {
  /**
   * Font family name
   */
  name: string;
  /**
   * For more advanced fonts configurations, use the weights object instead of src.
   * Font weights
   */
  weights?: FontWeightSetup[];
};

Css Variable

We can easily set or get a css variable by using cssVariable.

import { cssVariable } from "@mongez/dom";

// set color-primary
cssVariable("--color-primary", "#F00");

// get color primary

console.log(cssVariable("--color-primary")); // #F00

Set Css variable

If you would like to set a css variable to certain element, you may use setCssVariable

import { setCssVariable } from "@mongez/dom";

// set color-primary
setCssVariable("--color-primary", "#F00", document.body);

This will set --color-primary variable to the body element.

Get Css variable

If you would like to get a css variable to certain element, you may use getCssVariable

import { getCssVariable } from "@mongez/dom";

// get color-primary
getCssVariable("--color-primary", document.body); // "#F00"

getWindowWidth

getWindowWidth(): number

Added in 1.1.0

This function will return the current window's outer width.

import { getWindowWidth } from "@mongez/dom";

console.log(getWindowWidth()); // 1024

getWindowHeight

getWindowHeight(): number

Added in 1.1.0

This function will return the current window's outer height.

import { getWindowHeight } from "@mongez/dom";

console.log(getWindowHeight()); // 760

getScreenWidth

getScreenWidth(): number

Added in 1.1.0

This function will return the current screen's width.

import { getScreenWidth } from "@mongez/dom";

console.log(getScreenWidth()); // 1024

getScreenWidth

getScreenHeight(): number

Added in 1.1.0

This function will return the current screen's height.

import { getScreenHeight } from "@mongez/dom";

console.log(getScreenHeight()); // 760

Change Log

1.1.0 (21 July 2022)
- Added getWindowWidth function.
- Added getWindowHeight function.
- Added getScreenWidth function.
- Added getScreenHeight function.
- Added loadFont function.
1.0.11 (3 Apr 2022)
- Added setCssVariable function.
- Added getCssVariable function.
1.0.9 (15 Jan 2022)
- Added styleSheet function.
- Added googleFont function.
1.0.7 (08 Jan 2022)
- Added Set Element Attributes
- Added Get Element Attributes
1.0.6 (02 Jan 2022)
- Added Css Variable Function

TODO

Add Unit Tests.
Enhance Open Graph settings.
Enhance Twitter settings.
Enhance Favicon sizes.
Completing Metadata Docs.
Enhance pressed function to accept array of buttons, also add more keys in the keys list.

@mongez/dom

DOM Utilities

Installation

Usage

Setting Page title

Setting Page Description

Setting Page keywords

Setting Canonical Url

Setting Page image

Setting Page Favicon

Setting Page Color

Set Element Attributes

Setting HTML Attributes

Get Element Attributes

Combine meta data in one function

Get current meta data

Detects if user's device is in dark mode

Scroll to element

Append Javascript File

Sanitizing HTML to text

User keyboard detection

Stylesheet

Google fonts

Load Font

Usage

Css Variable

Set Css variable

Get Css variable

getWindowWidth

getWindowHeight

getScreenWidth

getScreenWidth

Change Log

TODO

Readme

Keywords

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