Comparisons

[dy]

Custom elements

MDN

// Create a class for the element
class PopUpInfo extends HTMLElement {
  constructor() {
    // Always call super first in constructor
    super();

    // Create a shadow root
    var shadow = this.attachShadow({mode: 'open'});

    // Create spans
    var wrapper = document.createElement('span');
    wrapper.setAttribute('class','wrapper');
    var icon = document.createElement('span');
    icon.setAttribute('class','icon');
    icon.setAttribute('tabindex', 0);
    var info = document.createElement('span');
    info.setAttribute('class','info');

    // Take attribute content and put it inside the info span
    var text = this.getAttribute('text');
    info.textContent = text;

    // Insert icon
    var imgUrl;
    if(this.hasAttribute('img')) {
      imgUrl = this.getAttribute('img');
    } else {
      imgUrl = 'img/default.png';
    }
    var img = document.createElement('img');
    img.src = imgUrl;
    icon.appendChild(img);

    // Create some CSS to apply to the shadow dom
    var style = document.createElement('style');

    style.textContent = '.wrapper {' +
                           'position: relative;' +
                        '}' +

                         '.info {' +
                            'font-size: 0.8rem;' +
                            'width: 200px;' +
                            'display: inline-block;' +
                            'border: 1px solid black;' +
                            'padding: 10px;' +
                            'background: white;' +
                            'border-radius: 10px;' +
                            'opacity: 0;' +
                            'transition: 0.6s all;' +
                            'position: absolute;' +
                            'bottom: 20px;' +
                            'left: 10px;' +
                            'z-index: 3;' +
                          '}' +

                          'img {' +
                            'width: 1.2rem' +
                          '}' +

                          '.icon:hover + .info, .icon:focus + .info {' +
                            'opacity: 1;' +
                          '}';

    // attach the created elements to the shadow dom

    shadow.appendChild(style);
    shadow.appendChild(wrapper);
    wrapper.appendChild(icon);
    wrapper.appendChild(info);
  }
}

// Define the new element
customElements.define('popup-info', PopUpInfo);

<popup-info img="img/alt.png" text="Your card validation code (CVC) is an extra
                                    security feature — it is the last 3 or 4 
                                    numbers on the back of your card.">

Spect

let $el = $('<div/>')
  .html`<${PopupInfo} img="img/alt.png" text="Your card validation code (CVC)
  is an extra security feature — it is the last 3 or 4 numbers on the
  back of your card."/>`

  function PopupInfo ($el) {
    $el.css`
      .wrapper {
        position: relative;
      }

      .info {
        font-size: 0.8rem;
        width: 200px;
        display: inline-block;
        border: 1px solid black;
        padding: 10px;
        background: white;
        border-radius: 10px;
        opacity: 0;
        transition: 0.6s all;
        position: absolute;
        bottom: 20px;
        left: 10px;
        z-index: 3;
      }

      img {
        width: 1.2rem
      }

      .icon:hover + .info, .icon:focus + .info {
        opacity: 1;
      }`;

    $el.html`<span.wrapper>
      <span.icon tabindex=0><img src=${ $el.img || 'img/default.png' }/></>
      <span.info>${ $el.text }</>
    </span>`
  }

Spect + maya

let $el = $('<div/>')

  .html`<${PopupInfo} img="img/alt.png" text="Your card validation code (CVC)
  is an extra security feature — it is the last 3 or 4 numbers on the
  back of your card."/>`

  console.log($el)

  function PopupInfo ($el) {
    $el.css`
      .icon:hover + .info, .icon:focus + .info {
        opacity: 1;
      }`;

    $el.html`<span.wrapper class=${maya`.p-rel`}>
      <span.icon tabindex=0><img class=${maya`w1.2rem`} src=${ $el.img || 'img/default.png' }/></>
      <span.info class=${maya`fs0.8 w25 dib b1solid p2 brad1 o0 t.6s pabs b3 l1 z3`}>${ $el.text }</>
    </span>`
  }

[dy]

https://gist.github.com/dy/6b78610f13a63876ad250e0401dcf7f8

[dy]

Outdated.