(Continued…)
It is quite understood that a web browser will invoke a single HTTP request to a server for its referring resource file when parsing an HTML element as <img src="/path/to/abc.png".
However, it is quite annoying if the image path is represented with variables from Hanjst. Here is a common but error-prone sentence written in Hanjst.
...
<img src="{$imgPath}" alt=""/>
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This sentence will trigger a real HTTP request to a server for asking for the resouce marked with the path, “{$imgPath}”, apparently, this will yiled a 404 page error.
In order to overcome this issue, Hanjst introduces a custom function named showImageAsync. The function will show an image with Hanjst variables in its image path. Here is the revised version of the example above.
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<img src=”data:image/png;base64,MA==” alt=”” id=”{$imgId}” data-src=”{$imgPath}”/>
{$showImageAsync($imgId)}
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Some other resources are also silimiar with the HTML image element, therefore Hanjst may add more custom functions to meet these kinds of requirements, such as,
{$loadScriptAsync($scriptId)}
(drafting…)
{$loadCSSAsync($cssId)}
(drafting…)