You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
56 lines
1.5 KiB
56 lines
1.5 KiB
// v-b-hover directive
|
|
import { EVENT_OPTIONS_NO_CAPTURE } from '../../constants/events';
|
|
import { isBrowser } from '../../utils/env';
|
|
import { eventOnOff } from '../../utils/events';
|
|
import { isFunction } from '../../utils/inspect'; // --- Constants ---
|
|
|
|
var PROP = '__BV_hover_handler__';
|
|
var MOUSEENTER = 'mouseenter';
|
|
var MOUSELEAVE = 'mouseleave'; // --- Utility methods ---
|
|
|
|
var createListener = function createListener(handler) {
|
|
var listener = function listener(evt) {
|
|
handler(evt.type === MOUSEENTER, evt);
|
|
};
|
|
|
|
listener.fn = handler;
|
|
return listener;
|
|
};
|
|
|
|
var updateListeners = function updateListeners(on, el, listener) {
|
|
eventOnOff(on, el, MOUSEENTER, listener, EVENT_OPTIONS_NO_CAPTURE);
|
|
eventOnOff(on, el, MOUSELEAVE, listener, EVENT_OPTIONS_NO_CAPTURE);
|
|
}; // --- Directive bind/unbind/update handler ---
|
|
|
|
|
|
var directive = function directive(el, _ref) {
|
|
var _ref$value = _ref.value,
|
|
handler = _ref$value === void 0 ? null : _ref$value;
|
|
|
|
if (isBrowser) {
|
|
var listener = el[PROP];
|
|
var hasListener = isFunction(listener);
|
|
var handlerChanged = !(hasListener && listener.fn === handler);
|
|
|
|
if (hasListener && handlerChanged) {
|
|
updateListeners(false, el, listener);
|
|
delete el[PROP];
|
|
}
|
|
|
|
if (isFunction(handler) && handlerChanged) {
|
|
el[PROP] = createListener(handler);
|
|
updateListeners(true, el, el[PROP]);
|
|
}
|
|
}
|
|
}; // VBHover directive
|
|
|
|
|
|
export var VBHover = {
|
|
bind: directive,
|
|
componentUpdated: directive,
|
|
unbind: function unbind(el) {
|
|
directive(el, {
|
|
value: null
|
|
});
|
|
}
|
|
};
|