109 lines
2.7 KiB
JavaScript
109 lines
2.7 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = void 0;
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var _directives = require("../../directives");
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var _console = require("../../util/console");
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var _vue = _interopRequireDefault(require("vue"));
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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// Directives
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// Utilities
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// Types
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/**
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* Scrollable
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*
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* Used for monitoring scrolling and
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* invoking functions based upon
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* scrolling thresholds being
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* met.
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*/
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/* @vue/component */
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var _default = _vue.default.extend({
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name: 'scrollable',
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directives: {
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Scroll: _directives.Scroll
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},
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props: {
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scrollTarget: String,
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scrollThreshold: [String, Number]
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},
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data: function data() {
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return {
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currentScroll: 0,
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currentThreshold: 0,
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isActive: false,
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isScrollingUp: false,
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previousScroll: 0,
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savedScroll: 0,
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target: null
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};
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},
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computed: {
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/**
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* A computed property that returns
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* whether scrolling features are
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* enabled or disabled
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*/
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canScroll: function canScroll() {
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return typeof window !== 'undefined';
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},
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/**
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* The threshold that must be met before
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* thresholdMet function is invoked
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*/
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computedScrollThreshold: function computedScrollThreshold() {
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return this.scrollThreshold ? Number(this.scrollThreshold) : 300;
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}
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},
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watch: {
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isScrollingUp: function isScrollingUp() {
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this.savedScroll = this.savedScroll || this.currentScroll;
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},
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isActive: function isActive() {
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this.savedScroll = 0;
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}
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},
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mounted: function mounted() {
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if (this.scrollTarget) {
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this.target = document.querySelector(this.scrollTarget);
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if (!this.target) {
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(0, _console.consoleWarn)("Unable to locate element with identifier ".concat(this.scrollTarget), this);
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}
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}
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},
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methods: {
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onScroll: function onScroll() {
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var _this = this;
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if (!this.canScroll) return;
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this.previousScroll = this.currentScroll;
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this.currentScroll = this.target ? this.target.scrollTop : window.pageYOffset;
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this.isScrollingUp = this.currentScroll < this.previousScroll;
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this.currentThreshold = Math.abs(this.currentScroll - this.computedScrollThreshold);
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this.$nextTick(function () {
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if (Math.abs(_this.currentScroll - _this.savedScroll) > _this.computedScrollThreshold) _this.thresholdMet();
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});
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},
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/**
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* The method invoked when
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* scrolling in any direction
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* has exceeded the threshold
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*/
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thresholdMet: function thresholdMet() {}
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}
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});
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exports.default = _default;
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//# sourceMappingURL=index.js.map
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