Query parameter values are truncated at a second equals sign

[xu91102]

Bug Report

Current behavior

Query parameter values are truncated at the second equals sign. On develop f34374b7423340e5ddec81c8ff565c26cc056fb5, parseQuery('?id=a=b=c&other=ok') returns {id: 'a', other: 'ok'} instead of preserving a=b=c.

The same parser is used by both hash and HTML5 history, so route queries exposed to plugins are affected. Values containing a literal equals sign, including padded encoded data, lose information.

Reproduction

From the source checkout:

import { parseQuery } from './src/core/router/util.js';
console.log(parseQuery('?id=a=b=c&other=ok'));
// { id: 'a', other: 'ok' }

Expected behavior

Only the first equals sign separates the parameter name from its value. Remaining equals signs should stay in the value. Existing decoding, plus-to-space conversion, empty values and valueless parameters should retain their behavior.

Environment

Docsify 5.0.0 develop source, Node.js on macOS. Reproduced directly and with a failing Jest regression in the existing router utility suite.