accessibility

To help you get started, we've collected the most common ways that accessibility is being used within popular public projects.

mozilla-b2g / gaia / tv_apps / smart-system / js / accessibility.js View on Github

if (aValue) {
                  SettingsListener.getSettingsLock().set({
                    'accessibility.screenreader-show-settings': true
                  });
                }
                this.screen.classList.toggle('screenreader', aValue);
                break;

              case 'accessibility.colors.enable':
                SettingsListener.getSettingsLock().set({
                  'layers.effect.invert': aValue ?
                    this.settings['accessibility.colors.invert'] : false,
                  'layers.effect.grayscale': aValue ?
                    this.settings['accessibility.colors.grayscale'] : false,
                  'layers.effect.contrast': aValue ?
                    this.settings['accessibility.colors.contrast'] : '0.0'
                });
                break;

              case 'accessibility.screenreader-captions':
                this.speechSynthesizer.captions = aValue;
                // If captions are displayed hide them.
                if (!aValue) {
                  this.speechSynthesizer.hideSpeech(true);
                }
                break;

              case 'accessibility.colors.invert':
              case 'accessibility.colors.grayscale':
              case 'accessibility.colors.contrast':
                if (this.settings['accessibility.colors.enable']) {
                  var effect = settingKey.split('.').pop();

View more ways to use accessibility

ACCESSIBILITY

>Add accessibility toolbar to your website with one line of code!

USAGE:

npm install accessibility

include script: ``

or import: import { Accessibility } from 'accessibility';

initialize component: window.addEventListener('load', function() { new Accessibility(); }, false);

Full Documentation and demo

>We are proud to announce that Joomla! are now using this repo as there built-in accessibility tool.

DESCRIPTION:

Features:

• [x] increase text size
• [x] decrease text size
• [x] increase line height
• [x] decrease line height
• [x] invert colors
• [x] gray hues
• [x] underline links
• [x] big cursor
• [x] reading guide
• [x] text to speech with 3 reading velocities
• [x] speech to text
• [x] suppress animations

>Does not depend any other directory (jQuery is not required). Easy to use!

LIMITATIONS & KNOWN ISSUES:

• Works with html5 browsers only (no IE8 and below)
• Text to speech & speech to text works in supported browsers and languages only

MULTI LANGUAGE EXAMPLE:

var labels = {
    resetTitle: 'reset (in my language)',
    closeTitle: 'close (in my language)',
    menuTitle: 'title (in my language)',
    increaseText: 'increase text size (in my language)',
    decreaseText: 'decrease text size (in my language)',
    increaseTextSpacing: 'increase text spacing (in my language)',
    decreaseTextSpacing: 'decrease text spacing (in my language)',
    increaseLineHeight: 'increase line height (in my language)',
    decreaseLineHeight: 'decrease line height (in my language)',
    invertColors: 'invert colors (in my language)',
    grayHues: 'gray hues (in my language)',
    underlineLinks: 'underline links (in my language)',
    bigCursor: 'big cursor (in my language)',
    readingGuide: 'reading guide (in my language)',
    textToSpeech: 'text to speech (in my language)',
    speechToText: 'speech to text (in my language)',
    disableAnimations: 'disable animations (in my language)',
    hotkeyPrefix: 'Hotkey: (in my language)',
};

var options = { labels: labels };
options.textToSpeechLang = 'en-US'; // or any other language
options.speechToTextLang = 'en-US'; // or any other language
new Accessibility(options);

DISABLE FEATURES EXAMPLE:

options.modules = {
    decreaseText: [true/false],
    increaseText: [true/false],
    invertColors: [true/false],
    increaseTextSpacing: [true/false],
    decreaseTextSpacing: [true/false],
    increaseLineHeight: [true/false],
    decreaseLineHeight: [true/false],
    grayHues: [true/false],
    underlineLinks: [true/false],
    bigCursor: [true/false],
    readingGuide: [true/false],
    textToSpeech: [true/false],
    speechToText: [true/false],
    disableAnimations: [true/false]
};

>When the default is true

TEXT SIZE MANIPULATION APPROACHES:

If text increase / decrease isn't working for your size your probably not using responsive font size units (such as em, rem etc.).
In that case you can initialize the accessibility tool like this:

new Accessibility({textPixelMode: true})

You can change the factor of the font size difference between every iteration (default is 12.5):

new Accessibility({textSizeFactor: 4})

ANIMATIONS:

Cancel all buttons animations:

new Accessibility({animations: {buttons: false}})

POSITIONING:

You can position the accessibility icon in any place on the screen. The default position is bottom right:

body {
    --_access-icon-top: 50px;
    --_access-icon-left: 50px;
    --_access-icon-right: unset;
    --_access-icon-bottom: unset;
}

ICON IMAGE:

You can change the default icon as described here

PERSISTENT SESSION:

From version 3.0.1 the session will be persistent even after the user will refresh the page. To disable this feature use:

const options = {
    session: {
        persistent: false
    }
};
new Accessibility(options);

DIRECT ACCESS TO THE API:

You can toggle the menu buttons directly via the exposed API:

var instance = new Accessibility();

instance.menuInterface.increaseText();

instance.menuInterface.decreaseText();

instance.menuInterface.increaseTextSpacing();

instance.menuInterface.decreaseTextSpacing();

instance.menuInterface.invertColors();

instance.menuInterface.grayHues();

instance.menuInterface.underlineLinks();

instance.menuInterface.bigCursor();

instance.menuInterface.readingGuide();

instance.menuInterface.textToSpeech();

instance.menuInterface.speechToText();

instance.menuInterface.disableAnimations();

You can also override the functionality like this:

instance.menuInterface.increaseText = function() {
    // My own way to increase text size . . .
}

ADD CUSTOM IFRAME:

You can add buttons that will open a model with custom iframes (for accessibility terms for example) like so:

const options = {
    iframeModals: [{
        iframeUrl: 'https://github.com/ranbuch/accessibility',
        buttonText: 'terms',
        icon: 'favorite',
        emoji: '❤️'
    }
};
new Accessibility(options);

In case you will not provide the "icon" and the "emoji" we will use this setup:

icon: 'policy', emoji: '⚖️'

You can find icons here

ADD CUSTOM FUNCTIONS:

You can add buttons that will invoke custom functions like so:

const options = {
    customFunctions: [{
        method: (cf, state) => {
            console.log('The provided customFunctions object:', cf);
            console.log('Toggle state:', state);
        },
        buttonText: 'my foo',
        id: 1,
        toggle: true,
        icon: 'psychology_alt',
        emoji: '❓'
    }
};
new Accessibility(options);

In case you will not provide the "icon" and the "emoji" we will use this setup:

icon: 'psychology_alt', emoji: '❓'

You can find icons here

You have to provide the "id" parameter. This would also be your way to identify the button in case you are using more then on function while using the same custom function.

You have to provide the "toggle" parameter. This will determine whether the button will toggle his state active state (on and off) or not.

CUSTOMIZE STYLING:

You can use CSS variables to change the styling of the menu. Here is an example of how you can change the exposed variables in order to change the theme to dark mode:

:root {
    --_access-menu-background-color: #000;
    --_access-menu-item-button-background: #222;
    --_access-menu-item-color: rgba(255,255,255,.6);
    --_access-menu-header-color: rgba(255,255,255,.87);
    --_access-menu-item-button-active-color: #000;
    --_access-menu-item-button-active-background-color: #fff;
    --_access-menu-div-active-background-color: #fff;
    --_access-menu-item-button-hover-color: rgba(255,255,255,.8);
    --_access-menu-item-button-hover-background-color: #121212;
    --_access-menu-item-icon-color: rgba(255,255,255,.6);
    --_access-menu-item-hover-icon-color: rgba(255,255,255,.8);
    --_access-menu-item-active-icon-color: #000;
}

Alternatively, you can suppress the default CSS injection altogether (not recommended):

new Accessibility({suppressCssInjection: true});

You can also replace the icons by replacing the content attribute with the CSS variables currently being used.

You can suppress the default HTML injection altogether:

const instance = new Accessibility({suppressDomInjection: true});

You will need to provide your own DOM and call menuInterface functions.

You might need to replace the font-face-src:

const options = {
    icon: {
        fontFaceSrc: ['https://fonts.bunny.net/icon?family=Material+Icons']
    }
};
new Accessibility(options);

Another example with font-awesome icons:

const options = {
    icon: {
        fontFaceSrc: ['https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/css/v4-font-face.min.css'],
        fontFamily: '"FontAwesome"',
        img: '[optional - URL for an image that will replace the menu icon]',
        closeIcon: '[optional - replacement text for the close menu icon]',
        resetIcon: '[optional - replacement text for the reset all icon]',
        closeIconElem: {
            type: 'i',
            attrs: {
                'class': 'fa fa-window-close',
                'aria-hidden': 'true'
            }
        },
        imgElem: {
            type: 'i',
            attrs: {
                'class': 'fa fa-universal-access',
                'aria-hidden': 'true'
            }
        },
        resetIconElem: {
            type: 'i',
            attrs: {
                'class': 'fa fa-refresh',
                'aria-hidden': 'true'
            }
        }
    }
};
new Accessibility(options);

:root {
    --_access-menu-item-icon-increase-text: "\f062";
    --_access-menu-item-icon-decrease-text: "\f063";
}

Obviously you will need to add the missing variables for the rest of the fonts.

CHANGE MODULES ORDER:

You can determine the order of the modules:

new Accessibility({
    modulesOrder: [
        {
            type: AccessibilityModulesType.textToSpeech,
            order: 0
        }
    ]
});

LICENSE: