Templating with Underscores: Revolutionizing token markers

When using out of the box underscore templating, the default markers for raw content are <%= %>, and for HTML escaped content are <%- %>.

However, it is possible to change these markers by adjusting the template settings, for example:

_.templateSettings.interpolate = /\{\{(.+?)\}\}/g;

The question arises, how does this configuration affect the distinction between raw and escaped content? It seems that by changing the markers, you might end up with only one type. Have I missed something in this process?

javascripttemplatesunderscore.js

Answer №1

The documentation for Underscore.js states (with emphasis added):

If you're not a fan of ERB-style delimiters, you have the option to modify Underscore's template settings to use different symbols for code interpolation. Simply define an interpolate regex to identify expressions that should be interpolated literally, an escape regex for expressions that need to be inserted after HTML escaping, and an evaluate regex for expressions that should be evaluated without being inserted into the output.

By specifying the escape property in the _.templateSettings object:

_.templateSettings.escape = /\{\{-(.*?)\}\}/g

>>> compiled = _.template("Escaped: {{- value }}\nNot escaped: {{ value }}")
>>> compiled({value: 'Hello, <b>world!</b>'})
"Escaped: Hello, &lt;b&gt;world!&lt;&#x2F;b&gt;
Not escaped: Hello, <b>world!</b>"

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