1424590 - {{LearnSidebar}} Cannot read property 'indexOf' of undefined

Status: RESOLVED DUPLICATE of bug 1362200

(developer.mozilla.org Graveyard :: KumaScript, defect)

Description

[Suraj Rao]

What did you do?
================
1. Click on edit of a page containing LearnSidebar section e.g https://developer.mozilla.org/en-US/docs/Learn/JavaScript/Building_blocks/Functions for editorial review
2. Click on preview (no need of adding any edit)


What happened?
==============
Shows a TemplateParserError:



    Error type:
        TemplateExecutionError 
    In macro:
        LearnSidebar (View Macro) 
    Parsing macro:
        LearnSidebar ([]) 
    Full text of error:

        Problem executing template LearnSidebar:
            1 | <div>{{LearnSidebar}}<br></div><div>{{PreviousMenuNext("Learn/JavaScript/Building_blocks/Looping_code","Learn/JavaScript/Building_blocks/Build_your_own_function", "Learn/JavaScript/Building_blocks")}}</div><p class="summary">Another essential concept in coding is <strong>functions</strong>, which allow you to store a piece of code that does a single task inside a defined block, and then call that code whenever you need it using a single short command — rather than having to type out the same code multiple times. In this article we'll explore fundamental concepts behind functions such as basic syntax, how to invoke and define them, scope, and parameters.</p><table class="learn-box standard-table cke_show_border"><tbody><tr><th scope="row">Prerequisites:</th><td>Basic computer literacy, a basic understanding of HTML and CSS, <a data-cke-saved-href="/en-US/docs/Learn/JavaScript/First_steps" href="/en-US/docs/Learn/JavaScript/First_steps">JavaScript first steps</a>.</td></tr><tr><th scope="row">Objective:</th><td>To understand the fundamental concepts behind JavaScript functions.</td></tr></tbody></table><h2 id="Where_do_I_find_functions">Where do I find functions?</h2><p>In JavaScript, you'll find functions everywhere. In fact, we've been using functions all the way through the course so far; we've just not been talking about them very much. Now is the time, however, for us to start talking about functions explicitly, and really exploring their syntax.</p><p>Pretty much anytime you make use of a JavaScript structure that features a pair of parentheses — <code>()</code> — and you're <strong>not</strong> using a common built-in language structure like a <a data-cke-saved-href="/en-US/Learn/JavaScript/Building_blocks/Looping_code#The_standard_for_loop" href="/en-US/Learn/JavaScript/Building_blocks/Looping_code#The_standard_for_loop">for loop</a>, <a data-cke-saved-href="/en-US/Learn/JavaScript/Building_blocks/Looping_code#while_and_do_..._while" href="/en-US/Learn/JavaScript/Building_blocks/Looping_code#while_and_do_..._while">while or do...while loop</a>, or <a data-cke-saved-href="/en-US/Learn/JavaScript/Building_blocks/conditionals#if_..._else_statements" href="/en-US/Learn/JavaScript/Building_blocks/conditionals#if_..._else_statements">if...else statement</a>, you are making use of a function.</p><h2 id="Built-in_browser_functions">Built-in browser functions</h2><p>We've made use of functions built in to the browser a lot in this course. Every time we manipulated a text string, for example:</p><pre class="brush: js">var myText = 'I am a string';
        -------------^
            2 | var newString = myText.replace('string', 'sausage');
            3 | console.log(newString);

        TypeError: ejs:703
            701| 
            702| <ol>
         >> 703|   <li data-default-state="<%=currentPageIsUnder('Getting_started_with_the_web')%>"><a href="<%=baseURL%>Getting_started_with_the_web"><strong><%=text['Complete_beginners']%></strong></a></li>
            704|   <li data-default-state="<%=currentPageIsUnder('Getting_started_with_the_web')%>"><a href="<%=baseURL%>Getting_started_with_the_web"><%=text['Getting_started_with_the_web']%></a>
            705|     <ol>
            706|       <li><a href="<%=baseURL%>Getting_started_with_the_web"><%=text['Getting_started_with_the_web_overview']%></a></li>

        Cannot read property 'indexOf' of undefined
            at currentPageIsUnder (eval at compile (/node_modules/ejs/lib/ejs.js:549:12), <anonymous>:17:11)
            at eval (eval at compile (/node_modules/ejs/lib/ejs.js:549:12), <anonymous>:710:25)
            at returnedFn (/node_modules/ejs/lib/ejs.js:580:17)
            at /app/lib/kumascript/templates.js:71:26




What should have happened?
==========================
Should not throw error and show the sidebar

Is there anything else we should know?
======================================
I am not sure if this will be introduced if edits get published.

Comment 1

[John Whitlock [:jwhitlock]]

Same as bug 1362200, but better bug title.