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    Highlighter.js

    Easily navigate the DOM and highlight the elements - http://720kb.github.io/highlighter.js/
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    highlighter javascript




    What is this?

    Highlighter.js is a tiny (pure javascript) library to easily navigate, select and highlight the DOM elements.

    Browser Support

    Depending on

    Query Selector

    Array Filter

    Installation

    HTML

    <!DOCTYPE html>
    <html>
    <head>
    <script src="../path/to/highlighter.min.js"></script>
    </head>
    <body>
    //your body here...
    //If you prefer performances, you can load the script at the bottom of your <body> instead of inside <head>
    </body>
    

    Bower

    bower install highlighter.js
    

    npm

    npm install highlighter.js
    

    Usage

    document.addEventListener("DOMContentLoaded", function() {
    
      var Highlighter = new window.Highlighter();
    
      Highlighter.next('<div>');
      Highlighter.underline();
    
      window.console.log('Highlighter underlined this element:', Highlighter.element);
    });
    

    Demo

    Live demo

    Commands

    Select Next

    Select next element starting from the current selected element (by default is the first DOM element)

    Highlighter.next();
    

    Select Previous

    Select previous element starting from the current selected element ( by default is the first DOM element)

    Highlighter.previous();
    

    Skip Next

    Skip a bunch of next elements starting from the current selected element

    Highlighter.skipNext(50);
    

    Skip Previous

    Skip a bunch of previous elements starting from the current selected element

    Highlighter.skipPrev(35);
    

    Underline

    Highlight the current selected element

    Highlighter.underline();
    

    Erase

    Remove highlighting from the current selected element

    Highlighter.erase();
    

    Select Next by ID

    Select next element (by ID) starting from the current selected element (by default is the first DOM element)

    Highlighter.next('#test');
    

    Select Next by class/es

    Select next element (by class/classes) starting from the current selected element (by default is the first DOM element)

    Highlighter.next('.class .class-2');
    

    Select Next by < tag > name

    Select next element (by < tag > name) starting from the current selected element (by default is the first DOM element)

    Highlighter.next('<span>');
    

    Select Previous by ID

    Select previous element (by ID) starting from the current selected element (by default is the first DOM element)

    Highlighter.previous('#test');
    

    Select Previous by class/es

    Select previous element (by class/classes) starting from the current selected element (by default is the first DOM element)

    Highlighter.previous('.class .class-2');
    

    Select Previous by < tag > name

    Select previous element (by < tag > name) starting from the current selected element (by default is the first DOM element)

    Highlighter.previous('<span>');
    

    Select Element By ID

    Select first element in the DOM by ID

    Highlighter.select('#id');
    

    Select Element by class/es

    Select first element in the DOM by class or classes

    Highlighter.select('.class .class2');
    

    Select Element by tag name

    Select first element in the DOM by < tag > name

    Highlighter.select('<span>');
    

    Point Element as starting line

    Point the Highlighter to a starting element so that Highlighter will start from that element and not from the first DOM element

    var element = window.document.getElementById('startFromThis');
    Highlighter.point(element);
    

    Options

    Highlighter color

    If you want a different highlighter color set the option { color:'#cc0011'}

    var Highlighter = new window.Highlighter({
      'color':'blue' //you can use any CSS valid color value
    });
    

    Exclude hidden/invisible elements

    Sometime you could need to work only on visible/viewable elements, so, to skip invisible or hidden elements, set the option { viewable:true}

    var Highlighter = new window.Highlighter({
      'viewable':true //this way Highlighter.js will exclude/avoid selecting or highlighting hidden/invisible elements
    });
    

    Scroll to the underlined element

    Sometime you could need to scroll to the current underlined element, so, to automatically scroll to it once is underlined you can set the options {scroll:true, scrollDuration: 500 }

    var Highlighter = new window.Highlighter({
      'scroll':true, //Automatically scroll to the underlined element
      'scrollDuration': 500 //milliseconds
    });
    

    Events

    There is a set of events that you could use for your needs.

    window.addEventListener('Highlighter:selected', function (evt) {
    
     console.log('This element has been selected', evt.eventData);
    });
    
    window.addEventListener('Highlighter:underlined', function (evt) {
    
     console.log('This element has been underlined', evt.eventData);
    });
    
    window.addEventListener('Highlighter:erased', function (evt) {
    
     console.log('This element has been erased', evt.eventData);
    });
    
    window.addEventListener('Highlighter:skipped', function () {
    
     console.log('Elements were skipped');
    });
    
    window.addEventListener('Highlighter:scrolled', function (evt) {
    
     console.log('Scrolled to this element', evt.eventData);
    });
    
    window.addEventListener('Highlighter:restart', function () {
    
     console.log('Highlighter restarted from the first DOM element');
    });
    

    Gtk

    • Not yet 100% ready for production
    • If your element/s has outline: CSS rule setted up, there could be problems or maybe not.
    • isVisible() control need a deep check, it could probably mistake at any time
    • Scroller is a bit horrible atm
    • If no selectable next elements, Highlighter will restart from the first element in DOM
    • If no selectable previous elements, Highlighter will restart from the first element in DOM

    License

    The MIT License (MIT)

    Copyright (c) 2015 Filippo Oretti, Dario Andrei

    Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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