devextreme/dist/transpiled/core/utils/view_port.js

HTML5 JavaScript Component Suite for Responsive Web Development

"use strict";

var $ = require("../renderer"),
    readyCallbacks = require("./ready_callbacks"),
    ready = readyCallbacks.add,
    changeCallback = require("./callbacks")(),
    $originalViewPort = $();

var value = function () {
    var $current;

    return function (element) {
        if (!arguments.length) {
            return $current;
        }

        var $element = $(element);
        $originalViewPort = $element;
        var isNewViewportFound = !!$element.length;
        var prevViewPort = value();
        $current = isNewViewportFound ? $element : $("body");
        changeCallback.fire(isNewViewportFound ? value() : $(), prevViewPort);
    };
}();

ready(function () {
    value(".dx-viewport");
});

exports.value = value;
exports.changeCallback = changeCallback;
exports.originalViewPort = function () {
    return $originalViewPort;
};