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HTML 

              
                <h1>Native Sharing Web Component</h1>
<p>This web component uses the <a href="https://web.dev/web-share/">Web Share API</a> to share a link. The sharing code was originally written for <a href="https://martinschneider.me/articles/creating-a-sharing-button-with-the-web-share-api/">my personal website</a>.</p>
<hr>
<p>The markup is generated without Shadow DOM and can be styled from outside the component.</p>
<p>See also: <a href="https://codepen.io/schneyra/pen/xxPxvow">Native Sharing Web Component with is-Attribute and Polyfill</a> and <a href="https://codepen.io/schneyra/pen/qBVWpBB">Native Sharing Web Component with Shadow DOM</a>.</p>
<p>Thanks to <a href="https://twitter.com/mariovhamann/status/1486683160893083654">Mario</a> who pointed me to this article <a href="https://discourse.world/h/2020/02/07/Web-components-without-Shadow-DOM">Web components without Shadow DOM</a>.
<p>I also wrote an <a href="https://martinschneider.me/articles/tinkering-with-web-components/">article on my blog</a>.</p>
<hr>
<p>Please note: This works currently only in Safari (macOS and iOS) and Chrome on Windows and Android. Other browsers won't show a button beneath.</p>
<msme-sharing-button data-buttontext="share this page" data-sharing-url="https://martinschneider.me" data-buttonclass="button" data-sharing-title="martinschneider.me" data-sharing-text="Martins Website"></msme-sharing-button>
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CSS 

              
                .button {
  border: 1px solid black;
  color: black;
  background-color: white;
  border-radius: 1rem;
  padding: 0.5rem 0.75rem;
  font-size: 1rem;
  display: flex;
  align-items: center;

  &:hover {
    background-color: black;
    color: white;
  }

  svg {
    width: 1em;
    height: 1em;
    margin-right: 0.5em;
  }
}
!

JS 

              
                class sharingButton extends HTMLElement {
  constructor() {
    super();

    if (!navigator.share) {
      console.log("msme-sharing-button: native sharing not supported.");
      return;
    }

    if (!this.getAttribute("data-sharing-url")) {
      console.error("msme-sharing-button: no url provided.");
      return;
    }

    // Android uses a different icon for sharing buttons
    // from devices in Apples ecosystem
    // Thanks to: https://davidwalsh.name/detect-android
    const ua = navigator.userAgent.toLowerCase();
    const isAndroid = ua.indexOf("android") > -1;
    let icon = null;
    if (isAndroid) {
      icon = `<svg aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="18" cy="5" r="3"/><circle cx="6" cy="12" r="3"/><circle cx="18" cy="19" r="3"/><line x1="8.59" y1="13.51" x2="15.42" y2="17.49"/><line x1="15.41" y1="6.51" x2="8.59" y2="10.49"/></svg>`;
    } else {
      icon = `<svg aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M4 12v8a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2v-8"/><polyline points="16 6 12 2 8 6"/><line x1="12" y1="2" x2="12" y2="15"/></svg>`;
    }

    let text = this.getAttribute("data-buttontext") ?? "share";
    let cssClass = this.getAttribute("data-buttonclass")
      ? `class="${this.getAttribute("data-buttonclass")}"`
      : "";

    let template = document.createElement("template");
    template.innerHTML = `<button type="button" ${cssClass}>${icon} ${text}</button>`;

    this._contents = new DocumentFragment();
    this._contents.appendChild(template.content.cloneNode(true));

    // and here's the sharing-action
    let button = this._contents.querySelector("button");
    button.addEventListener("click", () => {
      const shareData = {
        title: this.getAttribute("data-sharing-title"),
        text: this.getAttribute("data-sharing-text"),
        url: this.getAttribute("data-sharing-url")
      };

      navigator
        .share(shareData)
        .then(() => console.log("msme-sharing-button: sharing successful"))
        .catch((error) =>
          console.log("msme-sharing-button: error while sharing", error)
        );
    });

    this.appendChild(this._contents);
  }
}

customElements.define("msme-sharing-button", sharingButton);
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999px

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