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Example code of svengerlach/vanillajs-template

Informations about the package vanillajs-template

PHP VanillaJS Template

Build Status

A small port of John Resig's JavaScript micro templating approach to PHP for server-side pre-compilation of simple JavaScript templates.

Background

I've used John Resig's approach a lot in the passed. It's small, easy to use and comes with zero dependencies. I like it!

However, this method has one simple drawback:

If your application has set the Content-Security-Policy HTTP header for script-src to e.g. self, you will run into problems.

Google Chrome rejects the execution of the templating function with the following error message:

Uncaught EvalError: Refused to evaluate a string as JavaScript because 'unsafe-eval' is not an allowed source of script in the following Content Security Policy directive: "script-src 'self'"

Workarounds?

  1. Allow unsafe-eval as script-src within the Content-Security-Policy header
  2. Implement a workaround that pre-compiles templates to executable JavaScript functions

The first is not an option because it forces us to lower the security barriers.

I've opted for the second approach. Because most of my projects are PHP applications, I've decided to port John Resig's template conversion to PHP.

Installation

Installation is recommended to be done via composer by running:

Usage

This library can be used either as a standalone component or as a twig extension.

Standalone

See examples/standalone.php.

Twig extension

See examples/twigextension.html.twig.

See examples/twigextension.html.twig.

Room for improvement

One downside of the pre-compiled templates is that they are not compatible with JavaScript strict mode ("use strict";). The used with statement is nowadays considered bad practice.

All versions of vanillajs-template with dependencies

PHP Build Version
Package Version
Requires php Version >=5.4.0
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