@parsonic/share-button/index.js

Native share button web component

// src/ShareButton.js
function getGraphContent(property, defaultValue) {
  return document.querySelector(`meta[property='og:${property}']`)?.getAttribute("content") ?? defaultValue;
}
var ShareButton = class _ShareButton extends HTMLElement {
  /**
   * Defines the custom element with provided tag name if `navigator.share` is supported
   */
  static register(tag = "share-button") {
    if ("share" in navigator) {
      customElements.define(tag, _ShareButton);
    }
  }
  connectedCallback() {
    const defaultButton = document.createElement("button");
    defaultButton.textContent = this.dataset.buttonLabel ?? "Share";
    defaultButton.setAttribute("part", "button");
    const slot = document.createElement("slot");
    slot.setAttribute("name", "button");
    slot.appendChild(defaultButton);
    const shadowRoot = this.attachShadow({ mode: "open" });
    shadowRoot.appendChild(slot);
    slot.addEventListener("click", () => {
      let {
        url = getGraphContent("url", location.href),
        title = getGraphContent("title", document.title),
        text = getGraphContent("description"),
        shareEventName = "share",
        resultEventName = "shareResult"
      } = this.dataset;
      const data = { url, text, title };
      if (navigator.canShare(data) && this.dispatchEvent(
        new CustomEvent(shareEventName, {
          cancelable: true,
          bubbles: true,
          detail: data
        })
      )) {
        navigator.share(data).then(() => {
          this.dispatchEvent(
            new CustomEvent(resultEventName, {
              bubbles: true,
              detail: {
                result: "success",
                data
              }
            })
          );
        }).catch((error) => {
          this.dispatchEvent(
            new CustomEvent(resultEventName, {
              bubbles: true,
              detail: { result: "error", data, error }
            })
          );
        });
      }
    });
  }
};

// src/index.js
ShareButton.register();