content/static/js/clipboard.js

/*!
 * @license
 * Copyright 2020 The Go Authors. All rights reserved.
 * Use of this source code is governed by a BSD-style
 * license that can be found in the LICENSE file.
 */
export class CopyToClipboardController {
  constructor(el) {
    this._el = el;
    this._data = el.dataset['toCopy'] ?? '';
    el.addEventListener('click', e => this.handleCopyClick(e));
  }
  handleCopyClick(e) {
    e.preventDefault();
    const TOOLTIP_SHOW_DURATION_MS = 1000;
    if (!navigator.clipboard) {
      this.showTooltipText('Unable to copy', TOOLTIP_SHOW_DURATION_MS);
      return;
    }
    navigator.clipboard
      .writeText(this._data)
      .then(() => {
        this.showTooltipText('Copied!', TOOLTIP_SHOW_DURATION_MS);
      })
      .catch(() => {
        this.showTooltipText('Unable to copy', TOOLTIP_SHOW_DURATION_MS);
      });
  }
  showTooltipText(text, durationMs) {
    this._el.setAttribute('data-tooltip', text);
    setTimeout(() => this._el.setAttribute('data-tooltip', ''), durationMs);
  }
}
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