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<!DOCTYPE html>  <html lang="en"> <head> <meta charset="utf-8"> <title>CanJS - Core</title> <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no"> <link rel="stylesheet" type="text/css" href="./static/bundles/bit-docs-site/static.css"> <link rel="shortcut icon" sizes="16x16 24x24 32x32 48x48 64x64" href="/docs/images/canjs_favicon.ico"> <link rel="apple-touch-icon" sizes="57x57" href="../docs/images/canjs_favicon_57x57.png"> <link rel="apple-touch-icon-precomposed" sizes="57x57" href="../docs/images/canjs_favicon_57x57.png"> <link rel="apple-touch-icon" sizes="72x72" href="../docs/images/canjs_favicon_72x72.png"> <link rel="apple-touch-icon" sizes="114x114" href="../docs/images/canjs_favicon_114x114.png"> <link rel="apple-touch-icon" sizes="120x120" href="../docs/images/canjs_favicon_128x128.png"> <link rel="apple-touch-icon" sizes="144x144" href="../docs/images/canjs_favicon_144x144.png"> <link rel="apple-touch-icon" sizes="152x152" href="../docs/images/canjs_favicon_152x152.png"> <meta content="yes" name="apple-mobile-web-app-capable"> <meta name="apple-mobile-web-app-status-bar-style" content="white-translucent"> <script> (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) })(window,document,'script','https://www.google-analytics.com/analytics.js','ga'); ga('create', 'UA-2302003-11', 'auto'); ga('send', 'pageview'); </script> </head> <body> <input type="checkbox" id="nav-trigger" class="nav-trigger"/> <label for="nav-trigger">Menu</label> <div id="everything"> <div id="left" class="column"> <div class="top-left"> <div class="brand"> <div class="logo"> <a href="../index.html" alt="CanJS"></a> <div class="dropdown project-dropdown"> <a href="https://donejs.com/">DoneJS</a> <a href="http://stealjs.com/">StealJS</a> <a href="http://jquerypp.com/">jQuery ++</a> <a href="https://funcunit.com/">FuncUnit</a> <a href="http://documentjs.com/">DocumentJS</a> </div> </div> <div class="version"> <div class="version-number"> 3.0.0 </div> <div class="dropdown version-dropdown"> <a href="https://v2.canjs.com">2.3.27</a> </div> </div> </div> <div class="search-bar"> <p>   </p> </div> </div> <div class="bottom-left"> <div class="social-side-container"> <ul class="social-side"> <li> <a class="header-mobile github" href="https://github.com/canjs/canjs" target="_blank"><img class="social-icon-small" src="../docs/images/github.png">Github</a> </li> <li> <a class="header-mobile twitter" href="https://twitter.com/canjs" target="_blank"><img class="social-icon-small" src="../docs/images/twitter.png">Twitter</a> </li> </ul> <ul class="social-side"> <li> <a class="header-mobile" href="https://gitter.im/canjs/canjs" target="_blank">Chat</a> </li> <li> <a class="header-mobile" href="http://forums.donejs.com/c/canjs" target="_blank">Forum</a> </li> </ul> </div> <ul> <li class=" "> <a class="page" href="guides.html" title="Welcome to CanJS! 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Use it to assemble powerful model layers for any JavaScript project."> can-connect </a> </li> <li class=" "> <a class="module" href="can-define.html" title="Exports the define method that defines observable properties and their behavior on a prototype object."> can-define </a> </li> <li class=" "> <a class="module" href="can-define/list/list.html" title="Create observable lists."> can-define/list/list </a> </li> <li class=" "> <a class="module" href="can-define/map/map.html" title="Create observable objects."> can-define/map/map </a> </li> <li class=" "> <a class="function" href="can-route.html" title="Manage browser history and client state by synchronizing the window.location.hash with a map."> can-route </a> </li> <li class=" "> <a class="module" href="can-route-pushstate.html" title="Changes can-route to use pushstate to change the window's pathname instead of the hash. var route = require("can-route-pushstate"); route("{page}", { page: "home" }); route.ready(); route.attr("page", "user"); location.pathname; // -> "/user""> can-route-pushstate </a> </li> <li class=" "> <a class="module" href="can-set.html" title="can-set is a utility for comparing sets that are represented by the parameters commonly passed to service requests."> can-set </a> </li> <li class=" "> <a class="module" href="can-stache.html" title="Live binding Mustache and Handlebars-compatible templates."> can-stache </a> </li> <li class=" "> <a class="module" href="can-stache/helpers/route.html" title="Adds stache helpers that use can-route."> can-stache/helpers/route </a> </li> <li class=" "> <a class="module" href="can-stache-bindings.html" title="Provides template event, one-way, and two-way bindings."> can-stache-bindings </a> </li> </ul> </li> <li class=" "> <a class="page" href="can-ecosystem.html" title="Useful libraries that extend or add important features to the core collection."> Ecosystem </a> </li> <li class=" "> <a class="page" href="can-infrastructure.html" title="Utility libraries that power the core and ecosystem collection."> Infrastructure </a> </li> <li class=" "> <a class="page" href="can-legacy.html" title="Former libraries that we still accept patches for, but are not under active development."> Legacy </a> </li> </ul> </div> </div> <div id="right" class="column"> <div class="top-right"> <div class="top-right-top"> <ul class="top-right-bitovi"> <li class="dropdown"> <a href="http://bitovi.com" class="bitovi icon-bits">Bitovi</a> <ul class="dropdown-menu"> <li><a href="http://bitovi.com">Bitovi.com</a></li> <li><a href="http://bitovi.com/blog/">Blog</a></li> <li><a href="http://bitovi.com/consulting/">Consulting</a></li> <li><a href="http://bitovi.com/training/">Training</a></li> <li><a href="http://bitovi.com/open-source/">Open Source</a></li> </ul> </li> </ul> <div class="brand"> <div class="logo"> <a href="../index.html" alt="CanJS"></a> </div> </div> <ul class="top-right-links"> <li> <a href="https://gitter.im/canjs/canjs">Chat</a> </li> <li> <a href="http://forums.donejs.com/c/canjs">Forum</a> </li> <li> <a class="github-button nav-social" href="https://github.com/canjs/canjs" data-count-href="/canjs/canjs/stargazers" data-count-api="/repos/canjs/canjs#stargazers_count">Star</a> </li> <li> <a href="https://twitter.com/canjs" class="twitter-follow-button nav-social" data-show-count="true" data-show-screen-name="false">Follow @canjs</a><script async src="//platform.twitter.com/widgets.js" charset="utf-8"></script> </li> </ul> </div> <div class="breadcrumb"> <li><a href="../index.html">CanJS</a></li> / <li><a href="can-core.html">Core</a></li> <li class="breadcrumb-dropdown">/ <a> On this page</a> <ul class="on-this-page"></ul> </li> <div class="nav-toggle" title="Back to top"></div> </div> </div> <div class="bottom-right"> <article> <section class="title"> <div class="page-type"> <h1>Core</h1> <div>page</div> </div> <section class="description"> <p>The best, most hardened and generally useful libraries in CanJS.</p> </section> </section> <section class="on-this-page-table"> </section> <section class="title-footer"> <ul class="title-links">  <li><a href="//github.com/canjs/canjs/tree/v3.0.0/docs/can-canjs/can-core.md">source</a></li>   </ul> </section> <section class="body"> <h2>Use</h2> <p>CanJS's core libraries are the modules most commonly used to build web applications. Each module is part of an independent package, so you should install the ones you use directly:</p> <pre><code>npm install can-define can-set can-connect can-component can-stache can-route --save </code></pre> <p>Lets explore each one a bit more.</p> <h2>can-compute</h2> <p><a href="can-compute.html" title="Create an observable value.">can-compute</a>s represent an observable value. A compute can contain its own value and notify listeners of changes like:</p> <pre><code class="language-js">var compute = require("can-compute"); var name = compute("Justin"); // read the value name() //-> "Justin" name.on("change", function(ev, newVal, oldVal){ newVal //-> "Matthew" oldVal //-> "Justin" }); name("Matthew"); </code></pre> <p>More commonly, a compute derives its value from other observables. The following <code>info</code> compute derives its value from a <code>person</code> map, <code>hobbies</code> list, and <code>age</code> compute:</p> <pre><code class="language-js">var DefineMap = require("can-define/map/map"), DefineList = require("can-define/list/list"), compute = require("can-compute"); var person = new DefineMap({first: "Justin", last: "Meyer"}), hobbies = new DefineList(["js","bball"]), age = compute(33); var info = compute(function(){ return person.first +" "+ person.last+ " is "+age()+ "and like "+hobbies.join(", ")+"."; }); info() //-> "Justin Meyer is 33 and likes js, bball." info.on("change", function(ev, newVal){ newVal //-> "Justin Meyer is 33 and likes js." }); hobbies.pop(); </code></pre> <h2>can-define</h2> <p><a href="can-define/map/map.html" title="Create observable objects.">can-define/map/map</a> and <a href="can-define/list/list.html" title="Create observable lists.">can-define/list/list</a> allow you to create observable maps and lists with well defined properties. You can <a href="can-define.types.propDefinition.html" title="Defines the type, initial value, and get, set, and serialize behavior for an observable property. These behaviors can be specified with as an Object, String, Constructor function, Array, a getter expression, or setter expression.">define a property's type initial value, enumerability, getter-setters and much more</a>. For example, you can define the behavior of a <code>Todo</code> type and a <code>TodoList</code> type as follows:</p> <pre><code class="language-js">var DefineMap = require("can-define/map/map"); var DefineList = require("can-define/list/list"); var Todo = DefineMap.extend({ // A todo has a: name: "string", // .name that's a string complete: { // .complete that's type: "boolean", // a boolean value: false // initialized to false }, dueDate: "date", // .dueDate that's a date get isPastDue(){ // .pastDue that returns if the return new Date() > this.dueDate; // dueDate is before now }, toggleComplete: function(){ // .toggleComplete method that this.complete = !this.complete; // changes .complete } }); var TodoList = DefineList.extend({ // A list of todos: "#": Todo, // has numeric properties // as todos get completeCount(){ // has .completeCount that return this.filter("complete") // returns # of .length; // complete todos } }); </code></pre> <p>This allows you to create a Todo, read its properties, and call back its methods like:</p> <pre><code class="language-js">var dishes = new Todo({ name: "do dishes", // due yesterday dueDate: new Date() - 1000 * 60 * 60 * 24 }); dishes.name //-> "do dishes" dishes.isPastDue //-> true dishes.complete //-> false dishes.toggleComplete() dishes.complete //-> true </code></pre> <p>And it allows you to create a <code>TodoList</code>, access its items and properties like:</p> <pre><code class="language-js">var todos = new TodoList( dishes, {name: "mow lawn", dueDate: new Date()}); todos.length //-> 2 todos[0].complete //-> true todos.completeCount //-> 1 </code></pre> <p>These observables provide the foundation for data connection (models), view-models and even routing in your application.</p> <h2>can-set</h2> <p><a href="can-set.html" title="can-set is a utility for comparing sets that are represented by the parameters commonly passed to service requests.">can-set</a> models a service layer's behavior as a <a href="can-set.Algebra.html" title="Perform set logic with an awareness of how certain properties represent a set.">set.Algebra</a>. Once modeled, other libraries such as <a href="can-connect.html" title="can-connect provides persisted data middleware. Use it to assemble powerful model layers for any JavaScript project.">can-connect</a> or <a href="can-fixture.html" title="can-fixture intercepts an AJAX request and simulates the response with a file or function.">can-fixture</a> can add a host of functionality like: real-time behavior, performance optimizations, and simulated service layers.</p> <p>A <code>todosAlgebra</code> set algebra for a <code>GET /api/todos</code> service might look like:</p> <pre><code class="language-js">var set = require("can-set"); var todosAlgebra = new set.Algebra( // specify the unique identifier property on data set.prop.id("_id"), // specify that completed can be true, false or undefined set.prop.boolean("complete"), // specify the property that controls sorting set.prop.sort("orderBy") ) </code></pre> <p>This assumes that the service:</p> <ul> <li>Returns data where the unique property name is <code>_id</code>: <pre><code class="language-js">GET /api/todos -> [{_id: 1, name: "mow lawn", complete: true}, {_id: 2, name: "do dishes", complete: false}, ...] </code></pre></li> <li>Can filter by a <code>complete</code> property: <pre><code class="language-js">GET /api/todos?complete=false -> [{_id: 2, name: "do dishes", complete: false}, ...] </code></pre></li> <li>Sorts by an <code>orderBy</code> property: <pre><code class="language-js">GET /api/todos?orderBy=name -> [{_id: 2, name: "do dishes", complete: false}, {_id: 1, name: "mow lawn", complete: true}] </code></pre></li> </ul> <p>In the next section will use <code>todoAlgebra</code> to build a model with <a href="can-connect.html" title="can-connect provides persisted data middleware. Use it to assemble powerful model layers for any JavaScript project.">can-connect</a>.</p> <h2>can-connect</h2> <p><a href="can-connect.html" title="can-connect provides persisted data middleware. Use it to assemble powerful model layers for any JavaScript project.">can-connect</a> connects a data type, typically a <code>DefineMap</code> and its <code>DefineList</code>, to a service layer. This is often done via the <a href="can-connect/can/base-map/base-map.html" title="Create connection with many of the best behaviors in can-connect and hook it up to a map.">can-connect/can/base-map/base-map</a> module which bundles many common behaviors into a single api:</p> <pre><code class="language-js">var baseMap = require("can-connect/can/base-map/base-map"), DefineMap = require("can-define/map/map"), DefineList = require("can-define/list/list"), set = require("can-set"); var Todo = DefineMap.extend({ ... }); var TodosList = DefineMap.extend({ "#": Todo, ... }); var todosAlgebra = new set.Algebra({ ... }); var connection = baseMap({ url: "/api/todos", Map: Todo, List: TodoList, algebra: todosAlgebra, name: "todo" }); </code></pre> <p><code>baseMap</code> extends the <code>Map</code> type, in this case, <code>Todo</code>, with the ability to make requests to the service layer.</p> <ul> <li><a href="can-connect/can/map/map.getList.html" title="Gets a list of instances of the map type.">Get a list</a> of Todos <pre><code class="language-js">Todo.getList({complete: true}).then(function(todos){}) </code></pre></li> <li><a href="can-connect/can/map/map.get.html" title="Gets an instance of the map type.">Get</a> a single Todo <pre><code class="language-js">Todo.get({_id: 6}).then(function(todo){}) </code></pre></li> <li><a href="can-connect/can/map/map.prototype.save.html" title="Persists the map's data to the connection.">Create</a> a Todo <pre><code class="language-js">var todo = new Todo({name: "do dishes", complete: false}) todo.save().then(function(todo){}) </code></pre></li> <li><a href="can-connect/can/map/map.prototype.save.html" title="Persists the map's data to the connection.">Update</a> an <a href="can-connect/can/map/map.prototype.isNew.html" title="Returns if the map has not been persisted.">already created</a> Todo <pre><code class="language-js">todo.complete = true; todo.save().then(function(todo){}) </code></pre></li> <li><a href="can-connect/can/map/map.prototype.destroy.html" title="Delete's the instance with the connection.">Delete</a> a Todo <pre><code class="language-js">todo.destroy().then(function(todo){}) </code></pre></li> </ul> <p><a href="can-connect.html" title="can-connect provides persisted data middleware. Use it to assemble powerful model layers for any JavaScript project.">can-connect</a> is also middleware, so custom connections can be assembled too:</p> <pre><code class="language-js">var base = require("can-connect/base/base"); var dataUrl = require("can-connect/data-url/data-url"); var constructor = require("can-connect/constructor/constructor"); var map = require("can-connect/can/map/map"); var options = { url: "/api/todos", Map: Todo, List: TodoList, algebra: todosAlgebra, name: "todo" } var connection = map(constructor(dataUrl(base(options)))); </code></pre> <h2>can-stache</h2> <p><a href="can-stache.html" title="Live binding Mustache and Handlebars-compatible templates.">can-stache</a> provides live binding mustache and handlebars syntax. While templates should typically be loaded with a module loader like <a href="steal-stache.html" title="A StealJS extension that allows stache templates as dependencies.">steal-stache</a>, you can create a template programmatically that lists out todos within a promise loaded from <code>Todo.getList</code> like:</p> <pre><code class="language-js">var stache = require("can-stache"); // Creates a template var template = stache( "<ul>"+ "{{#if todos.isPending}}<li>Loading...</li>{{/if}}"+ "{{#if todos.isResolved}}"+ "{{#each todos.value}}"+ "<li class='{{#complete}}complete{{/complete}}'>{{name}}</li>"+ "{{else}}"+ "<li>No todos</li>"+ "{{/each}}"+ "{{/if}}"+ "</ul>"); // Calls the template with some data var frag = template({ todos: Todo.getList({}) }); // Inserts the result into the page document.body.appendChild(frag); </code></pre> <p><a href="can-stache.html" title="Live binding Mustache and Handlebars-compatible templates.">can-stache</a> templates use magic tags like <code>{{}}</code> to control what content is rendered. The most common forms of those magic tags are:</p> <ul> <li><a href="can-stache.tags.escaped.html" title="Insert the value of the expression into the output of the template.">{{key}}</a> - Insert the value at <code>key</code> in the page. If <code>key</code> is a function or helper, run it and insert the result.</li> <li><a href="can-stache.tags.section.html" title="Renders a subsection one or more times depending on the type of expression or the expression's return value.">{{#key}}...{{/key}}</a> - Render the content between magic tags based on some criteria.</li> </ul> <p><a href="can-stache.html" title="Live binding Mustache and Handlebars-compatible templates.">can-stache</a> templates return document fragments that update whenever their source data changes.</p> <h2>can-component</h2> <p><a href="can-component.html" title="Create a custom element that can be used to manage widgets or application logic.">can-component</a> creates custom elements with unit-testable view models. It combines a view model created by <a href="can-define/map/map.html" title="Create observable objects.">can-define/map/map</a> with a template created by <a href="can-stache.html" title="Live binding Mustache and Handlebars-compatible templates.">can-stache</a>.</p> <pre><code class="language-js">var Component = require("can-component"); var DefineMap = require("can-define/map/map"); var stache = require("can-stache"); // Defines the todos-list view model var TodosListVM = DefineMap.extend({ // An initial value that is a promise containing the // list of all todos. todos: { value: function(){ return Todo.getList({}); } }, // A method that toggles a todo's complete property // and updates the todo on the server. toggleComplete: function(todo){ todo.complete = !todo.complete; todo.save(); } }); Component.extend({ tag: "todos-list", ViewModel: TodosVM, view: stache( "<ul>"+ "{{#if todos.isPending}}<li>Loading...</li>{{/if}}"+ "{{#if todos.isResolved}}"+ "{{#each todos.value}}"+ "<li ($click)='toggleComplete(.)'"+ "class='{{#complete}}complete{{/complete}}'>{{name}}</li>"+ "{{else}}"+ "<li>No todos</li>"+ "{{/each}}"+ "{{/if}}"+ "</ul>"); }); </code></pre> <h2>can-stache-bindings</h2> <p><a href="can-stache-bindings.html" title="Provides template event, one-way, and two-way bindings.">can-stache-bindings</a> provides <a href="can-view-callbacks.attr.html" title="Register custom behavior for an attribute.">custom attributes</a> for <a href="can-stache.html" title="Live binding Mustache and Handlebars-compatible templates.">can-stache</a> event and data bindings.</p> <p>Bindings look like:</p> <ul> <li><code>(event)="key()"</code> for <a href="can-stache-bindings.event.html" title="Response to events on elements or component ViewModels.">event binding</a>.</li> <li><code>{prop}="key"</code> for <a href="can-stache-bindings.toChild.html" title="One-way bind a value in the parent scope to the viewModel.">one-way binding to a child</a>.</li> <li><code>{^prop}="key"</code> for <a href="can-stache-bindings.toParent.html" title="One-way bind a value in the current viewModel to the parent scope.">one-way binding to a parent</a>.</li> <li><code>{(prop)}="key"</code> for <a href="can-stache-bindings.twoWay.html" title="Two-way bind a value in the viewModel or the element to the parent scope.">two-way binding</a>.</li> </ul> <p>Adding <code>$</code> to a binding like <code>($event)="key()"</code> changes the binding from the viewModel to the element's attributes or properties.</p> <p><a href="can-stache-bindings.event.html" title="Response to events on elements or component ViewModels.">Event</a> binding examples:</p> <pre><code class="language-html"> <li ($click)="toggleComplete(.)"/>  <my-modal (cancel)="resetData()"/> </code></pre> <p><a href="can-stache-bindings.toChild.html" title="One-way bind a value in the parent scope to the viewModel.">One-way to child</a> examples:</p> <pre><code class="language-html"> <input type="checkbox" {$checked}="complete"/>  <todos-list {todos}="getTodos(complete=true)"/> </code></pre> <p><a href="can-stache-bindings.toChild.html" title="One-way bind a value in the parent scope to the viewModel.">One-way to parent</a> examples:</p> <pre><code class="language-html"> <input type="checkbox" {^$checked}="complete"/>  <todos-list {^todos}="todosList"/> </code></pre> <p><a href="can-stache-bindings.twoWay.html" title="Two-way bind a value in the viewModel or the element to the parent scope.">Two-way</a> examples:</p> <pre><code class="language-html"> <input type="text" {($value)}="name"/>  <date-picker {(date)}="dueDate"/> </code></pre> <h2>can-route and can-route-pushstate</h2> <p><a href="can-route.html" title="Manage browser history and client state by synchronizing the window.location.hash with a map.">can-route</a> connects a <code>DefineMap</code>'s properties to values in the url. Create a map type, [canjs/doc/can-route.map connect it to the url], and <a href="can-route.ready.html" title="Initializes can-route.">begin routing</a> like:</p> <pre><code class="language-js">var route = require("can-route"); var DefineMap = require("can-define/map/map"); var AppViewModel = DefineMap.extend({ seal: false },{ // Sets the default type to string "#": "string", todoId: "string", todo: { get: function(){ if(this.todoId) { return Todo.get({_id: this.todoId}) } } } }); var appViewModel = new AppViewModel(); route.map(appViewModel); route.ready(); </code></pre> <p>When the url changes, to something like <code>#!&todoId=5</code>, so will the <code>appViewModel</code>'s <code>todoId</code> and <code>todo</code> property:</p> <pre><code class="language-js">appViewModel.todoId //-> "5" appViewModel.todo //-> Promise<Todo> </code></pre> <p>Similarly, if <code>appViewModel</code>'s <code>todoId</code> is set like:</p> <pre><code class="language-js">appViewModel.todoId = 6; </code></pre> <p>The hash will be updated:</p> <pre><code class="language-js">window.location.hash //-> "#!&todoId=6" </code></pre> <p>The <code>route</code> function can be used to specify pretty routing rules that translate property changes to a url and a url to property changes. For example,</p> <pre><code class="language-js">// a route like: route("todo/{todoId}"); // and a hash like: window.location.hash = "#!todo/7"; // produces an appViewModel like: appViewModel.serialize() //-> {route: "todo/{todoId}", todoId: "7"} </code></pre> <p><a href="can-route-pushstate.html" title="Changes can-route to use pushstate to change the window's pathname instead of the hash. var route = require("can-route-pushstate"); route("{page}", { page: "home" }); route.ready(); route.attr("page", "user"); location.pathname; // -> "/user"">can-route-pushstate</a> adds <a href="https://developer.mozilla.org/en-US/docs/Web/API/History_API">pushstate</a> support. It mixes in this behavior so you just need to import the module:</p> <pre><code class="language-js">var route = require("can-route"); require("can-route-pushstate"); </code></pre> <h2>Want to learn more?</h2> <p>If you haven't already, checkout the <a href="guides.html" title="Welcome to CanJS! These guides are here to help you develop and improve your relationship with CanJS. After all, picking a JavaScript framework is a commitment. We want CanJS to be the framework you marry. This page helps you know how advance through the different stages of this relationship:">Guides</a> page on how to learn CanJS. Specifically, you'll want to checkout the <a href="guides/chat.html" title="This guide walks through building real time chat application with CanJS's Core libraries. It takes about 30 minutes to complete.">Chat Guide</a> and <a href="guides/todomvc.html" title="This guide walks through building a slightly modified version of TodoMVC with CanJS's Core libraries and can-fixture. It takes about 1 hour to complete.">TodoMVC Guide</a> to learn the basics of using CanJS's core libraries. After that, checkout the <a href="guides/api.html" title="This page walks through how to use and understand CanJS's API documentation.">API Guide</a> on how to use and learn from these API docs.</p> </section> <script type="text/javascript"> var docObject = {"src":{"path":"docs/can-canjs/can-core.md"},"description":"The best, most hardened and generally useful libraries in CanJS. \n","name":"can-core","title":"Core","type":"page","parent":"canjs","outline":"0","comment":" ","pathToRoot":".."}; </script> </article> <footer><p>CanJS is part of <a href="http://donejs.com" target="_blank">DoneJS</a>. 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