feat(devtools): add ability to hide internal signals on the graph #65982
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Marks Angular-authored signals with a ɵ debugName prefix and teaches DevTools to filter/sanitize those nodes, reducing noise in the signal graph. Related to angular#65894
JeanMeche
reviewed
Dec 11, 2025
| const isAngularSource = | ||
| fnName.startsWith('ɵ') || | ||
| fnName.includes('ɵɵ') || | ||
| /node_modules\/@angular\//.test(fnSource) || |
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To me this rule isn't satisfiying. We probably don't want to exlude every signal from the graph but only the ones that are internal (ie not exposed as part of the public API).
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Updated.
New behaviour:
-
Prefix with "ɵ" anything inside Angular sources that’s clearly internal:
-- class fields/getters/setters tagged@internal;
-- private identifiers (#foo);
-- names starting with_or markedprivate;
-- top-level signals that are not exported. -
Keep original name:
-- all user code;
-- public class fields without internal markers;
-- exported module-level constants.
See screenshots:
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Marks Angular-authored signals with a ɵ debugName prefix and teaches DevTools to filter/sanitize those nodes, reducing noise in the signal graph.
Related to #65894
PR Checklist
Please check if your PR fulfills the following requirements:
PR Type
What kind of change does this PR introduce?
What is the current behavior?
Internal framework signals crowd the DevTools signal graph and are indistinguishable from user signals. Compiler-emitted debugNames for Angular sources were not consistently marked for filtering.
Issue Number: #65894
What is the new behavior?
Angular-authored signals get a
ɵdebugName prefix from the compiler transform, and DevTools treatsɵ-prefixed nodes as internal. The signal graph hides prefixed/internal signals when the toggle is enabled,.Does this PR introduce a breaking change?
Other information
Tests updated for the compiler transform and DevTools backend to cover the new prefixing/filtering behavior.