https://filamenthdl.com/docs/static/custom-highlight.js

1hljs.registerLanguage("filament", (hljs) => ({
2    name: "filament",
3    keywords: {
4        keyword: "bundle in import extern for if else new where comp",
5    },
6    contains: [
7        hljs.QUOTE_STRING_MODE,
8        {
9            className: 'literal',
10            scope: 'number',
11            begin: '\\b[0-9]+'
12        },
13        {
14            className: 'operator',
15            begin: '[-+*<>=]'
16        },
17        {
18            className: 'variable',
19            begin: '#[A-Za-z][0-9A-Za-z]*'
20        },
21        hljs.COMMENT(
22            '/\\*', // begin
23            '\\*/', // end
24            {}
25        ),
26        hljs.C_LINE_COMMENT_MODE,
27    ],
28}));
29
30hljs.registerLanguage("verilog", (hljs) => ({
31    name: "verilog",
32    keywords: {
33        keyword: "module endmodule input output"
34    },
35    contains: [
36        {
37            className: 'literal',
38            scope: 'number',
39            begin: '[0-9]+'
40        },
41    ]
42}));
43
44hljs.initHighlightingOnLoad();