polygerrit-ui/app/elements/shared/gr-tooltip/gr-tooltip.js

/**
 * @license
 * Copyright (C) 2016 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
(function() {
  'use strict';

  Polymer({
    is: 'gr-tooltip',
    _legacyUndefinedCheck: true,

    properties: {
      text: String,
      maxWidth: {
        type: String,
        observer: '_updateWidth',
      },
      positionBelow: {
        type: Boolean,
        reflectToAttribute: true,
      },
    },

    _updateWidth(maxWidth) {
      this.updateStyles({'--tooltip-max-width': maxWidth});
    },
  });
})();