vuetify/lib/directives/click-outside/index.js

Vue Material Component Framework

import { attachedRoot } from '../../util/dom';

function defaultConditional() {
  return true;
}

function checkEvent(e, el, binding) {
  // The include element callbacks below can be expensive
  // so we should avoid calling them when we're not active.
  // Explicitly check for false to allow fallback compatibility
  // with non-toggleable components
  if (!e || checkIsActive(e, binding) === false) return false; // If we're clicking inside the shadowroot, then the app root doesn't get the same
  // level of introspection as to _what_ we're clicking. We want to check to see if
  // our target is the shadowroot parent container, and if it is, ignore.

  const root = attachedRoot(el);
  if (root instanceof ShadowRoot && root.host === e.target) return false; // Check if additional elements were passed to be included in check
  // (click must be outside all included elements, if any)

  const elements = (typeof binding.value === 'object' && binding.value.include || (() => []))(); // Add the root element for the component this directive was defined on


  elements.push(el); // Check if it's a click outside our elements, and then if our callback returns true.
  // Non-toggleable components should take action in their callback and return falsy.
  // Toggleable can return true if it wants to deactivate.
  // Note that, because we're in the capture phase, this callback will occur before
  // the bubbling click event on any outside elements.

  return !elements.some(el => el.contains(e.target));
}

function checkIsActive(e, binding) {
  const isActive = typeof binding.value === 'object' && binding.value.closeConditional || defaultConditional;
  return isActive(e);
}

function directive(e, el, binding) {
  const handler = typeof binding.value === 'function' ? binding.value : binding.value.handler;
  el._clickOutside.lastMousedownWasOutside && checkEvent(e, el, binding) && setTimeout(() => {
    checkIsActive(e, binding) && handler && handler(e);
  }, 0);
}

function handleShadow(el, callback) {
  const root = attachedRoot(el);
  callback(document.body);

  if (root instanceof ShadowRoot) {
    callback(root);
  }
}

export const ClickOutside = {
  // [data-app] may not be found
  // if using bind, inserted makes
  // sure that the root element is
  // available, iOS does not support
  // clicks on body
  inserted(el, binding) {
    const onClick = e => directive(e, el, binding);

    const onMousedown = e => {
      el._clickOutside.lastMousedownWasOutside = checkEvent(e, el, binding);
    };

    handleShadow(el, app => {
      app.addEventListener('click', onClick, true);
      app.addEventListener('mousedown', onMousedown, true);
    });
    el._clickOutside = {
      lastMousedownWasOutside: true,
      onClick,
      onMousedown
    };
  },

  unbind(el) {
    if (!el._clickOutside) return;
    handleShadow(el, app => {
      if (!app || !el._clickOutside) return;
      app.removeEventListener('click', el._clickOutside.onClick, true);
      app.removeEventListener('mousedown', el._clickOutside.onMousedown, true);
    });
    delete el._clickOutside;
  }

};
export default ClickOutside;
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