Checking optional parameter with ternary expression

[jokarl]

Hi,

To check if a parameter is optional or not, this is the only way I've gotten it to work.

<%= typeof optional!='undefined' ? optional : '' %>

Shouldn't this work as well?

<%= optional ? optional : '' %>

Is there any other way to do this?

[jokarl]

An example for if ... else and a ternary expression would be appreciated. Having trouble to get any of them to work.

    <% if(optional) {
    include partial 
    } %>

partial.ejs:

<h2><%= optional %></h2>

Results in this:

Module build failed: SyntaxError: Unexpected identifier in "."
at Object.exports.compile (C:\git\misc\designsystem\node_modules\ejs-compiled-loader\node_modules\ejs\lib\ejs.js:258:14)
at Object.module.exports (C:\git\misc\designsystem\node_modules\ejs-compiled-loader\index.js:7:22)

It doesn't matter if supply the parameter optional or not, it still fails.

Just this:

<%  include partial %>	

And passing the parameter optional works.
If not passing optional, it compiles and I get an error in the console, which I expected to see.

optional is not defined

[Adam-Meisen]

<% if(optional) {
include partial 
} %>

should look like

<% if(optional) { %>
<%- include partial %>
<% } %>

If you're using the version installed by default from npm, the correct docs are here. You can install the actual latest version, which uses this version of ejs with npm install ejs-compiled-loader@^2.2.0 or yarn add ejs-compiled-loader@^2.2.0

It's pretty confusing at the moment, took me a while to figure out.

Edit: Sorry, I forgot to answer the original question. I don't know if there's any way to keep it from spitting out an error when ejs tries to resolve optional. You might want to do something like

<% var optional = optional || false; %>
<% if(optional) { %>
<%- include partial %>
<% } %>

[jokarl]

Thank you! I upgraded to 2.2.0 and it also allows include paths to be relative to the template. Had some problems in mocha when they were relative to where webpack was run.