Search highlighted matches do not reflect typed text

[thdoan]

Describe the bug

When you type in the search box, the highlighted matches (underlined text) do not reflect what you've actually typed.

Reproduction

1. Go to https://vitepress.dev/
2. Click on search box
3. Type "focus"

ISSUE: "focus" should be highlighted in purple, but only "foc" is highlighted (see screenshot).

Expected behavior

The expected behavior is for the entered text to be highlighted.

System Info

System:
    OS: Linux 5.0 undefined
    CPU: (8) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
    Memory: 0 Bytes / 0 Bytes
    Shell: 1.0 - /bin/jsh
  Binaries:
    Node: 18.20.3 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 10.2.3 - /usr/local/bin/npm
    pnpm: 8.15.6 - /usr/local/bin/pnpm
  npmPackages:
    vitepress: latest => 1.3.4

Additional context

Validations

• Check if you're on the latest VitePress version.
• Follow our Code of Conduct
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.