35 lines
1.3 KiB
JavaScript
35 lines
1.3 KiB
JavaScript
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/*
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* Extension to the knockoutjs mapping plugin
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* http://github.com/janhartigan/knockout-mapping-updatedata
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* Requires KnockoutJS and the mapping plugin
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*
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* Dual licensed under the MIT or GPL Version 2 licenses.
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* Jan Hartigan
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*/
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(function () {
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/**
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* A function that lets you "update from js" without overriding all the view model properties and methods. You just need to supply
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* the viewModel, the original JS model on which you based your data (typically what you'd use in the mapping fromJS method), and the new JS
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* object that has the updated information.
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*
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* @param Object viewModel
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* @param Object dataModel
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* @param Object jsObject
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*
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* @return Object (returns the viewModel)
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*/
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ko.mapping.updateData = function (viewModel, dataModel, jsObject) {
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if (arguments.length < 3) throw new Error("When calling ko.updateData, pass: the view model, the data model, and the updated data.");
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if (!viewModel) throw new Error("The view model is undefined.");
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for (var i in dataModel) {
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if (i in jsObject && i in viewModel && typeof dataModel[i] != 'function') {
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viewModel[i](jsObject[i]);
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}
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}
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return viewModel;
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}
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ko.exportSymbol('ko.mapping.updateData', ko.mapping.updateData);
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})();
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