import { nextTick, pushScopeId, popScopeId, openBlock, createBlock, withScopeId } from 'vue';

function getInternetExplorerVersion() {
  var ua = window.navigator.userAgent;
  var msie = ua.indexOf('MSIE ');

  if (msie > 0) {
    // IE 10 or older => return version number
    return parseInt(ua.substring(msie + 5, ua.indexOf('.', msie)), 10);
  }

  var trident = ua.indexOf('Trident/');

  if (trident > 0) {
    // IE 11 => return version number
    var rv = ua.indexOf('rv:');
    return parseInt(ua.substring(rv + 3, ua.indexOf('.', rv)), 10);
  }

  var edge = ua.indexOf('Edge/');

  if (edge > 0) {
    // Edge (IE 12+) => return version number
    return parseInt(ua.substring(edge + 5, ua.indexOf('.', edge)), 10);
  } // other browser


  return -1;
}

let isIE;

function initCompat () {
  if (!initCompat.init) {
    initCompat.init = true;
    isIE = getInternetExplorerVersion() !== -1;
  }
}

var script = {
  name: 'ResizeObserver',

  props: {
    emitOnMount: {
      type: Boolean,
      default: false,
    },

    ignoreWidth: {
      type: Boolean,
      default: false,
    },

    ignoreHeight: {
      type: Boolean,
      default: false,
    },
  },

  emits: [
    'notify',
  ],

  mounted () {
    initCompat();
    nextTick(() => {
      this._w = this.$el.offsetWidth;
      this._h = this.$el.offsetHeight;
      if (this.emitOnMount) {
        this.emitSize();
      }
    });
    const object = document.createElement('object');
    this._resizeObject = object;
    object.setAttribute('aria-hidden', 'true');
    object.setAttribute('tabindex', -1);
    object.onload = this.addResizeHandlers;
    object.type = 'text/html';
    if (isIE) {
      this.$el.appendChild(object);
    }
    object.data = 'about:blank';
    if (!isIE) {
      this.$el.appendChild(object);
    }
  },

  beforeUnmount () {
    this.removeResizeHandlers();
  },

  methods: {
    compareAndNotify () {
      if ((!this.ignoreWidth && this._w !== this.$el.offsetWidth) || (!this.ignoreHeight && this._h !== this.$el.offsetHeight)) {
        this._w = this.$el.offsetWidth;
        this._h = this.$el.offsetHeight;
        this.emitSize();
      }
    },

    emitSize () {
      this.$emit('notify', {
        width: this._w,
        height: this._h,
      });
    },

    addResizeHandlers () {
      this._resizeObject.contentDocument.defaultView.addEventListener('resize', this.compareAndNotify);
      this.compareAndNotify();
    },

    removeResizeHandlers () {
      if (this._resizeObject && this._resizeObject.onload) {
        if (!isIE && this._resizeObject.contentDocument) {
          this._resizeObject.contentDocument.defaultView.removeEventListener('resize', this.compareAndNotify);
        }
        this.$el.removeChild(this._resizeObject);
        this._resizeObject.onload = null;
        this._resizeObject = null;
      }
    },
  },
};

const _withId = /*#__PURE__*/withScopeId("data-v-b329ee4c");

pushScopeId("data-v-b329ee4c");
const _hoisted_1 = {
  class: "resize-observer",
  tabindex: "-1"
};
popScopeId();

const render = /*#__PURE__*/_withId((_ctx, _cache, $props, $setup, $data, $options) => {
  return (openBlock(), createBlock("div", _hoisted_1))
});

script.render = render;
script.__scopeId = "data-v-b329ee4c";
script.__file = "src/components/ResizeObserver.vue";

function install(app) {
  // eslint-disable-next-line vue/component-definition-name-casing
  app.component('resize-observer', script);
  app.component('ResizeObserver', script);
}

var plugin = {
  // eslint-disable-next-line no-undef
  version: "2.0.0-alpha.1",
  install: install
};

export default plugin;
export { script as ResizeObserver, install };
//# sourceMappingURL=vue-resize.esm.js.map