Module Link Preload

A Simple module that allows pre-loading of assets (css, fonts, scripts, etc...) loading in Magento 2

Installation

1. Go to your Magento root directory
2. Run composer require m2-boilerplate/module-link-preload

Usage

To add assets to the block, provide the assets argument:

<referenceBlock name="head.csspreload">
    <arguments>
        <argument name="assets" xsi:type="array">
            <item name="unique_name" xsi:type="array">
                <item name="path" xsi:type="string">css/filename.css</item>
                <item name="as" xsi:type="string">style</item>
                <item name="attributes" xsi:type="array">
                    <item name="name1" xsi:type="string">value1</item>
                    <item name="name2" xsi:type="string">value2</item>
                </item>
            </item>
        </argument>
    </arguments>
</referenceBlock>

To modify the template of the generated <link /> tags, provide a link_template argument, e.g.:

<referenceBlock name="head.csspreload">
    <arguments>
        <argument name="link_template" xsi:type="string"><![CDATA[<link rel="preload" as=":as:" href=":path:" :attributes: />]]></argument>
    </arguments>
</referenceBlock>

There are three variables that will be substituted: :path:, which will be replaced by the asset path, :as: which will be replaced by the asset type and :attributes: that will contain your attributes of your assets as HTML attributes.