Named characters references containing digits are not processed properly #51323
Description
Which @angular/* package(s) are the source of the bug?
compiler, core
Is this a regression?
No
Description
HTML standard defines many "named HTML entities", 24 of them include digits in their names, none of them is rendered correctly when present in Angular component's template, in contrast with other valid entities.
Please provide a link to a minimal reproduction of the bug
https://stackblitz.com/edit/angular-test-html-entities-with-numbers?file=src%2Findex.html
Please provide the exception or error you saw
`»¹«` is output as `»¹«` instead of `»¹«` (or verbatim). See the screenshot further.
Please provide the environment you discovered this bug in (run ng version)
(Stackblitz Angular version in linked STR: 16.2.0)
Angular CLI: 13.2.6
Node: 16.20.2
Package Manager: npm 8.19.4
OS: win32 x64
Angular: 13.2.7
... animations, common, compiler, compiler-cli, core, forms
... platform-browser, platform-browser-dynamic, router
Package Version
------------------------------------------------------------
@angular-devkit/architect 0.1303.9
@angular-devkit/build-angular 13.3.9
@angular-devkit/core 13.3.9
@angular-devkit/schematics 13.2.6
@angular/cdk 13.3.9
@angular/cli 13.2.6
@angular/material 13.3.9
@angular/material-moment-adapter 13.3.9
@schematics/angular 13.2.6
rxjs 7.5.7
typescript 4.5.5
webpack 5.75.0
Anything else?
Screenshot; "»𝕏«" in the first content line is for check.
List of all "entity names" (for search):
- blk12
- blk14
- blk34
- emsp13
- emsp14
- frac12
- frac13
- frac14
- frac15
- frac16
- frac18
- frac23
- frac25
- frac34
- frac35
- frac38
- frac45
- frac56
- frac58
- frac78
- sup1
- sup2
- sup3
- there4
(frac12, frac14, frac34, sup1, sup2, sup3 can be also without semicolon. None semicolon-less variant work in Angular component, even for non-digit entities.)