Feature: #91715 - Add multiple has($identifier) methods to \TYPO3\CMS\Core\Page\AssetCollector 

See forge#91715

Description 

The new feature can check if the assets such as JavaScript, inline stylesheets, stylesheets, and media already exist before generating it again.

To accomplish this, new methods has been added to \TYPO3\CMS\Core\Page\AssetCollector :

  • hasJavaScript(string $identifier): bool
  • hasInlineJavaScript(string $identifier): bool
  • hasStyleSheet(string $identifier): bool
  • hasInlineStyleSheet(string $identifier): bool
  • hasMedia(string $identifier): bool
//use TYPO3\CMS\Core\Page\AssetCollector;
//use TYPO3\CMS\Core\Utility\GeneralUtility;

$assetsCollector = GeneralUtility::makeInstance(AssetCollector::class);
if ($assetsCollector->hasJavaScript($identifier)) {
  // result: true - javascript with identifier $identifier exists
} else {
  // result: false - javascript with identifier $identifier do not exists
}

// $result<X> is true if $identifier exists, otherwise false.
$result1 = $assetsCollector->hasJavaScript($identifier);
$result2 = $assetsCollector->hasInlineJavaScript($identifier);
$result3 = $assetsCollector->hasStyleSheet($identifier);
$result4 = $assetsCollector->hasInlineStyleSheet($identifier);
$result5 = $assetsCollector->hasMedia($identifier);
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Impact 

Users have the ability to check if the asset already exists before regenerating it, thus avoiding redundancy.