devextreme/cjs/__internal/core/utils/m_view_port.js

HTML5 JavaScript Component Suite for Responsive Web Development

/**
 * DevExtreme (cjs/__internal/core/utils/m_view_port.js)
 * Version: 24.2.6
 * Build date: Mon Mar 17 2025
 *
 * Copyright (c) 2012 - 2025 Developer Express Inc. ALL RIGHTS RESERVED
 * Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
 */

"use strict";
Object.defineProperty(exports, "__esModule", {
    value: true
});
exports.changeCallback = void 0;
exports.originalViewPort = originalViewPort;
exports.value = void 0;
var _renderer = _interopRequireDefault(require("../../../core/renderer"));
var _callbacks = _interopRequireDefault(require("../../../core/utils/callbacks"));
var _ready_callbacks = _interopRequireDefault(require("../../../core/utils/ready_callbacks"));

function _interopRequireDefault(e) {
    return e && e.__esModule ? e : {
        default: e
    }
}
const ready = _ready_callbacks.default.add;
const changeCallback = exports.changeCallback = (0, _callbacks.default)();
let $originalViewPort = (0, _renderer.default)();
const value = exports.value = function() {
    let $current;
    return function(element) {
        if (!arguments.length) {
            return $current
        }
        const $element = (0, _renderer.default)(element);
        $originalViewPort = $element;
        const isNewViewportFound = !!$element.length;
        const prevViewPort = value();
        $current = isNewViewportFound ? $element : (0, _renderer.default)("body");
        changeCallback.fire(isNewViewportFound ? value() : (0, _renderer.default)(), prevViewPort)
    }
}();
ready((function() {
    value(".dx-viewport")
}));

function originalViewPort() {
    return $originalViewPort
}