Introduce formatter for Jinja2 templates

[mathjazz]

We should introduce a formatter for Jinja2 templates, because our templates are a bit of a mess.

I came across these two:

• https://github.com/davidodenwald/prettier-plugin-jinja-template
• https://djlint.com/

[dannycolin]

FWIW, prettier-plugin-jinja-template only found 3 malformed files:

pontoon/machinery/templates/machinery/microsoft_terminology.jinja
pontoon/teams/templates/teams/email_request_item.jinja
pontoon/teams/templates/teams/email_request_pretranslation.jinja

[mathjazz]

Thanks, @dannycolin!

We should probably make changes to .prettierrc, because most of our templates use the .html extension.

[dannycolin]

I did update prettier configuration which is in packages.json:

  "prettier": {
    "endOfLine": "lf",
    "trailingComma": "all",
    "tabWidth": 2,
    "jsxSingleQuote": true,
    "singleQuote": true,
    "plugins": [
      "prettier-plugin-jinja-template"
    ],
    "overrides": [
      {
        "files": [
          "**/*.html",
          "**/*.jinja"
        ],
        "options": {
          "parser": "jinja-template"
        }
      }
    ]
  },

[mathjazz]

And it left all .html files unchanged?

[dannycolin]

Yes. I even tried to `npx prettier a-specifc-file.html` that I messed with the content. Maybe I'm missing something obvious but my settings look fine. I'll push my push later today.

…

On February 9, 2026 1:24:26 p.m. UTC, "Matjaž Horvat" ***@***.***> wrote: mathjazz left a comment (mozilla/pontoon#3941) And it left all `.html` files unchanged? -- Reply to this email directly or view it on GitHub: #3941 (comment) You are receiving this because you were mentioned. Message ID: ***@***.***>

[dannycolin]

See: #3959

I did miss an ignore rule in .prettierrc and fixed it in my PR.