focus-in.js
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import { extend } from '../vue';
import { EVENT_OPTIONS_NO_CAPTURE } from '../constants/events';
import { eventOn, eventOff } from '../utils/events'; // @vue/component
export var focusInMixin = extend({
data: function data() {
return {
listenForFocusIn: false
};
},
watch: {
listenForFocusIn: function listenForFocusIn(newValue, oldValue) {
if (newValue !== oldValue) {
eventOff(this.focusInElement, 'focusin', this._focusInHandler, EVENT_OPTIONS_NO_CAPTURE);
if (newValue) {
eventOn(this.focusInElement, 'focusin', this._focusInHandler, EVENT_OPTIONS_NO_CAPTURE);
}
}
}
},
beforeCreate: function beforeCreate() {
// Declare non-reactive properties
this.focusInElement = null;
},
mounted: function mounted() {
if (!this.focusInElement) {
this.focusInElement = document;
}
if (this.listenForFocusIn) {
eventOn(this.focusInElement, 'focusin', this._focusInHandler, EVENT_OPTIONS_NO_CAPTURE);
}
},
beforeDestroy: function beforeDestroy() {
eventOff(this.focusInElement, 'focusin', this._focusInHandler, EVENT_OPTIONS_NO_CAPTURE);
},
methods: {
_focusInHandler: function _focusInHandler(event) {
if (this.focusInHandler) {
this.focusInHandler(event);
}
}
}
});