minor symfony#20757 Add Twig field_id() form helper (alamirault)

This PR was merged into the 7.3 branch.

Discussion
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Add Twig `field_id()` form helper

Fix symfony#20725

Commits
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b76b199 [TwigBridge] Add Twig field_id() form helper

Author: javiereguiluz

form/form_customization.rst

@@ -103,6 +103,7 @@ That's why Symfony provides other Twig form helpers that render the value of
 each form field part without adding any HTML around it:
 
 * ``field_name()``
+* ``field_id()``
 * ``field_value()``
 * ``field_label()``
 * ``field_help()``
@@ -116,6 +117,7 @@ fields, so you no longer have to deal with form themes:
 
     <input
         name="{{ field_name(form.username) }}"
+        id="{{ field_id(form.username) }}"
         value="{{ field_value(form.username) }}"
         placeholder="{{ field_label(form.username) }}"
         class="form-control"
@@ -129,6 +131,10 @@ fields, so you no longer have to deal with form themes:
         {% endfor %}
     </select>
 
+.. versionadded:: 7.3
+
+    The ``field_id()`` helper was introduced in Symfony 7.3.
+
 Form Rendering Variables
 ------------------------
 

reference/twig_reference.rst

@@ -408,6 +408,7 @@ explained in the article about :doc:`customizing form rendering </form/form_cust
 * :ref:`form_row() <reference-forms-twig-row>`
 * :ref:`form_rest() <reference-forms-twig-rest>`
 * :ref:`field_name() <reference-forms-twig-field-helpers>`
+* :ref:`field_id() <reference-forms-twig-field-helpers>`
 * :ref:`field_value() <reference-forms-twig-field-helpers>`
 * :ref:`field_label() <reference-forms-twig-field-helpers>`
 * :ref:`field_help() <reference-forms-twig-field-helpers>`