How to modify a rendered HTML string by adding custom code to setContent() in core in a module?

wildfeed

12/15/22, 3:10 PM

I want to override the HTML string returned by core using a custom module that replaces $content['#markup'], or the entire $content array returned by HtmlResponse::setContent().

I can override Response::setContent() by calling HtmlResponse::setContent(). Exactly how do I add this to a custom module, for example implementing a service?

My goal is altering all the <a> tags to add a <span> tag to the ones that links to downloadable files.

2 + 3

Jaypan

12/15/22, 3:36 PM

You should tell us what your overall goal is, not just how you are trying to accomplish it. This post needs more details.

wildfeed

12/15/22, 4:00 PM

@Jaypan - I want to run a REGEX on the rendered HTML string that will modify all the <a> tags by adding a <span> to the ones that link to downloadable files. I have the regex, Too many links from too many different sources to do this effectively in the theme so I want to try this approach

hoanns

12/15/22, 6:35 PM

do you want to change a Form or Controller output?

Score:0

Drupal

4uk4

12/15/22, 7:20 PM

If you want to act on the rendered HTML of a render array rather than the structured content array before rendering, use a #post_render callback. See How to alter page content?

0 + 0

Score:0

Drupal

hoanns

12/15/22, 6:43 PM

If you want to change the output of a form see hook_form_alter

If you want to change the output of controllers see this answer. You can also subscribe to other Kernel Events with that method and should be able to alter any output your site creates. (kernel.response is probably what you need)

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Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: How to modify a rendered HTML string by adding custom code to setContent() in core in a module?

TH: วิธีแก้ไขสตริง HTML ที่แสดงผลโดยเพิ่มโค้ดที่กำหนดเองใน setContent() ในคอร์ในโมดูล

RO: Cum se modifică un șir HTML redat adăugând cod personalizat la setContent() în core într-un modul?

RU: Как изменить отображаемую строку HTML, добавив собственный код в setContent() в ядре модуля?

VI: Làm cách nào để sửa đổi chuỗi HTML được hiển thị bằng cách thêm mã tùy chỉnh vào setContent() trong lõi trong mô-đun?

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