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<!DOCTYPE html>  <html lang="en"> <head> <meta charset="utf-8"> <title>CanJS - Hash Expression</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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These functions are typically used to provide functionality that is more appropriate for the view than the viewModel."> Helpers </a> </li> <li class=" "> <a class="page" href="../../can-stache.Binding.html" title="Live binding refers to templates which update themselves when their state or data changes. can-stache templates are able to listen to observables (like map, list, and can-compute) changing and update the page to reflect those changes."> Live Binding </a> </li> </ul> </li> <li> <span>Methods</span> <ul> <li class=" "> <a class="function" href="../../can-stache.from.html" title="Return a template loaded from an element."> from </a> </li> <li class=" "> <a class="function" href="../../can-stache.registerConverter.html" title="Register a helper for bidirectional value conversion."> registerConverter </a> </li> <li class=" "> <a class="function" href="../../can-stache.registerHelper.html" title="Register a helper."> registerHelper </a> </li> <li class=" "> <a class="function" href="../../can-stache.registerPartial.html" title="Register a partial. Register a partial template that can be rendered with can-stache.tags.partial."> registerPartial </a> </li> <li class=" "> <a class="function" href="../../can-stache.registerSimpleHelper.html" title="Register a helper that gets passed values."> registerSimpleHelper </a> </li> <li class=" "> <a class="function" href="../../can-stache.safeString.html" title="Indicate that a string does not need to be escaped to be safely inserted into the page."> safeString </a> </li> </ul> </li> <li> <span>Tags</span> <ul> <li class=" "> <a class="function" href="../../can-stache.tags.escaped.html" title="Insert the value of the expression into the output of the template."> {{expression}} </a> </li> <li class=" "> <a class="function" href="../../can-stache.tags.unescaped.html" title="Insert the unescaped value of the expression into the output of the template."> {{{expression}}} </a> </li> <li class=" "> <a class="function" 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."> {{#expression}} </a> </li> <li class=" "> <a class="function" href="../../can-stache.tags.close.html" title=""> {{/expression}} </a> </li> <li class=" "> <a class="function" href="../../can-stache.tags.inverse.html" title="Like can-stache.tags.section, but renders the opposite subsection depending on the type of expression or the expression's return value."> {{^expression}} </a> </li> <li class=" "> <a class="function" href="../../can-stache.tags.partial.html" title="Render another template within the current template."> {{>key}} </a> </li> <li class=" "> <a class="function" href="../../can-stache.tags.comment.html" title="A comment that doesn't get inserted into the rendered result."> {{!expression}} </a> </li> <li class=" "> <a class="function" href="../../can-stache.helpers.else.html" title=""> {{else}} </a> </li> </ul> </li> <li> <span>Expressions</span> <ul> <li class=" "> <a class="typedef" href="bracket.html" title=""> Bracket Expression </a> </li> <li class=" "> <a class="typedef" href="call.html" title=""> Call Expression </a> </li> <li class="current parent expanded"> <a class="typedef" href="hash.html" title=""> Hash Expression </a> </li> <li class=" "> <a class="typedef" href="helper.html" title=""> Helper Expression </a> </li> <li class=" "> <a class="typedef" href="key-lookup.html" title=""> KeyLookup Expression </a> </li> <li class=" "> <a class="typedef" href="literal.html" title="Specify a JavaScript primitive type."> Literal Expression </a> </li> </ul> </li> <li> <span>Key Operators</span> <ul> <li class=" "> <a class="typedef" href="../keys/at.html" title="Return whatever value is at a key, regardless if it's a function or a compute."> @at </a> </li> <li class=" "> <a class="typedef" href="../keys/compute.html" title="Pass a compute instead of a value if an observable is found within calls."> ~compute </a> </li> <li class=" "> <a class="typedef" href="../keys/current.html" title="Lookup a value in only the current context."> ./current </a> </li> <li class=" "> <a class="typedef" href="../keys/parent.html" title="Start looking for values in the parent context."> ../parent </a> </li> <li class=" "> <a class="typedef" href="../keys/special.html" title="Event bindings and some helpers like can-stache.helpers.each provide special values that start with % to prevent potential collisions with other values."> %special </a> </li> <li class=" "> <a class="typedef" href="../keys/this.html" title="Write out or return the current context."> this </a> </li> <li class=" "> <a class="typedef" href="../keys/variable.html" title="Store a variable local to the template."> *variable </a> </li> <li class=" "> <a class="typedef" href="../../can-stache.key.html" title="A named reference to a value in the scope or helper scope in a template."> key </a> </li> </ul> </li> <li> <span>Helpers</span> <ul> <li class=" "> <a class="function" href="../../can-stache.helpers.if.html" title="can-stache.helpers.if"> {{#if expression}} </a> </li> <li class=" "> <a class="function" href="../../can-stache.helpers.unless.html" title=""> {{#unless expression}} </a> </li> <li class=" "> <a class="function" href="../../can-stache.helpers.each.html" title=""> {{#each expression}} </a> </li> <li class=" "> <a class="function" href="../../can-stache.helpers.with.html" title="Changes the context within a block."> {{#with expression}} </a> </li> <li class=" "> <a class="function" href="../../can-stache.helpers.log.html" title=""> {{log}} </a> </li> <li class=" "> <a class="function" href="../../can-stache.helpers.is.html" title="Render something if two values are equal."> {{#is expressions}} </a> </li> <li class=" "> <a class="function" href="../../can-stache.helpers.switch.html" title=""> {{#switch expression}} </a> </li> <li class=" "> <a class="function" href="../../can-stache.helpers.case.html" title=""> {{#case expression}} </a> </li> <li class=" "> <a class="function" href="../../can-stache.helpers.default.html" title=""> {{#default}} </a> </li> <li class=" "> <a class="function" href="../../can-stache.helpers.joinBase.html" title=""> {{joinBase expressions}} </a> </li> </ul> </li> <li> <span>Types</span> <ul> <li class=" "> <a class="typedef" href="../../can-stache.getterSetter.html" title="The getterSetter argument passed to registerConverter."> getterSetter </a> </li> <li class=" "> <a class="typedef" href="../../can-stache.helper.html" title="A helper function passed to can-stache.registerHelper. Given the arguments, returns the content that should be shown in the DOM or a function that will be called on the DOM element the helper was called on."> helper </a> </li> <li class=" "> <a class="typedef" href="../../can-stache.helperOptions.html" title="The options argument passed to a helper function when called by a helper."> helperOptions </a> </li> <li class=" "> <a class="typedef" href="../../can-stache.renderer.html" title="A function returned by can-stache that renders a template into an html documentFragment."> renderer </a> </li> <li class=" "> <a class="typedef" href="../../can-stache.sectionRenderer.html" title="Renders a section. These functions are usually provided as .fn and .inverse on a stache helper's options."> sectionRenderer </a> </li> <li class=" "> <a class="typedef" href="../../can-stache.simpleHelper.html" title="A helper function passed to can-stache.registerSimpleHelper."> simpleHelper </a> </li> </ul> </li> </ul> </li> <li class=" "> <a class="module" href="../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 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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><a href="../../can-stache.html">can-stache</a></li> / <li><a href="hash.html">Hash Expression</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>Hash Expression</h1> <div>typedef</div> </div> <section class="description"> </section> </section> <section class="on-this-page-table"> </section> <section class="title-footer"> <ul class="title-links">  <li><a href="//github.com/canjs/can-stache/tree/v3.0.8/docs/expressions/hash.md">source</a></li>   </ul> </section> <div class="signature"> <h2 class="signature-title"> <code>[PROPERTY_NAME=EXPRESSION ]+</code> </h2> <p>A sequence of one or more property names and their values as another expression like:</p> <pre><code>prop1=1 prop2=key prop3=callExpression() </code></pre> <p>In a <a href="call.html" title="">Call Expression</a>, <code>Hash</code> expressions create an object argument with the specified <code>PROPERTY_NAME</code> properties and <code>EXPRESSION</code> values.</p> <p>The following template:</p> <pre><code class="language-js">{{ method( age=5 first=person.firstName last=person.getLastName() ) }} </code></pre> <p>Might call <code>method</code> with:</p> <pre><code class="language-js">{age: 5, first: "Justin", last: "Meyer"} </code></pre> <p>In a <a href="helper.html" title="">Helper Expression</a>, <code>Hash</code> expressions add to the <a href="../../can-stache.helperOptions.html" title="The options argument passed to a helper function when called by a helper.">helperOptions</a>'s <code>hash</code> object with the specified <code>PROPERTY_NAME</code> properties and <code>EXPRESSION</code> values.</p> <p>The following template:</p> <pre><code class="language-js">{{ method age=5 first=person.firstName last=person.getLastName() }} </code></pre> <p>Might call <code>method</code> with:</p> <pre><code class="language-js">{ hash: {age: 5, first: compute("Justin"), last: compute("Meyer")} } </code></pre> <div class="parameters"> <h3 class="parameters-title">Parameters</h3> <ol> <li><b>PROPERTY_NAME</b> <code>{String}</code>: <p>The property name on the call expression argument object or <a href="../../can-stache.helperOptions.html" title="The options argument passed to a helper function when called by a helper.">helperOptions</a>'s <code>hash</code> object.</p> </li> <li><b>EXPRESSION</b> <code>{<a href="literal.html" title="Specify a JavaScript primitive type.">Literal Expression</a>|<a href="key-lookup.html" title="">KeyLookup Expression</a>|<a href="call.html" title="">Call Expression</a>}</code>: <p>An expression that provides a value for the property name.</p> </li> </ol> </div> </div> <section class="body"> <h2>Use</h2> <p>A hash expression specifies a property value on a object argument in a call expression and property value on the the hash object in a helper expression's <a href="../../can-stache.helperOptions.html" title="The options argument passed to a helper function when called by a helper.">helperOptions</a> argument.</p> <p>For example, in a call expression:</p> <pre><code>Template: {{methodA(prop=key)}} {{methodB(propX=key propY='literal', propZ=5)}} Data: { methodA: function(arg){}, methodB: function(arg1, arg2){}, key: compute("value") } </code></pre> <ul> <li><code>methodA</code> will be called with <code>{prop: "value"}</code> as <code>arg</code>.</li> <li><code>methodB</code> will be called with <code>{propX: "value", propY: 'literal'}</code> as <code>arg1</code> and <code>{propZ: 5}</code> as <code>arg2</code></li> </ul> <p>In a helper expression:</p> <pre><code>Template: {{methodA prop=key}} {{methodB(propX=key propY='literal' propZ=5)}} Data: { methodA: function(options){}, methodB: function(options){}, key: compute("value") } </code></pre> <ul> <li><code>methodA</code> will be called with <code>{prop: compute("value")}</code> as <code>options.hash</code>.</li> <li><code>methodB</code> will be called with <code>{propX: "value", propY: 'literal', propZ: 5}</code> as <code>options.hash</code>.</li> </ul> </section> <script type="text/javascript"> var docObject = {"src":{"path":"node_modules/can-stache/docs/expressions/hash.md"},"description":"\n","type":"typedef","title":"Hash Expression","types":[{"type":"String"}],"name":"can-stache/expressions/hash","parent":"can-stache/expressions","signatures":[{"code":"[PROPERTY_NAME=EXPRESSION ]+","description":"\n\nA sequence of one or more property names and their values as another expression like:\n\n```\nprop1=1 prop2=key prop3=callExpression()\n```\n\nIn a [can-stache/expressions/call], `Hash` expressions\ncreate an object argument with the specified `PROPERTY_NAME` properties\nand `EXPRESSION` values.\n\nThe following template:\n\n```js\n{{ method( age=5 first=person.firstName last=person.getLastName() ) }}\n```\n\nMight call `method` with:\n\n```js\n{age: 5, first: \"Justin\", last: \"Meyer\"}\n```\n\nIn a [can-stache/expressions/helper], `Hash` expressions\nadd to the [can-stache.helperOptions]'s `hash` object with the specified `PROPERTY_NAME` properties\nand `EXPRESSION` values.\n\nThe following template:\n\n```js\n{{ method age=5 first=person.firstName last=person.getLastName() }}\n```\n\nMight call `method` with:\n\n```js\n{\n\thash: {age: 5, first: compute(\"Justin\"), last: compute(\"Meyer\")}\n}\n```\n\n","params":[{"types":[{"type":"String"}],"name":"PROPERTY_NAME","description":"The property name on the call expression\nargument object or [can-stache.helperOptions]'s `hash` object.\n"},{"types":[{"type":"can-stache/expressions/literal"},{"type":"can-stache/expressions/key-lookup"},{"type":"can-stache/expressions/call"}],"name":"EXPRESSION","description":"An expression that provides a\nvalue for the property name.\n"}]}],"_curParam":{"types":[{"type":"can-stache/expressions/literal"},{"type":"can-stache/expressions/key-lookup"},{"type":"can-stache/expressions/call"}],"name":"EXPRESSION","description":"An expression that provides a\nvalue for the property name.\n"},"comment":" ","pathToRoot":"../../.."}; </script> </article> <footer><p>CanJS is part of <a href="http://donejs.com" target="_blank">DoneJS</a>. 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