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url() params break when wrapping in strings.

See original GitHub issue

Environment

"linaria": "^1.3.1", "webpack": "^4.29.6",

Description

Using src: url('../../../assets/Roboto-Medium.ttf'); causes the following error:

ERROR in ./.linaria-cache/src/ui/styles/fonts.linaria.css
Module build failed (from ./node_modules/mini-css-extract-plugin/dist/loader.js):
ModuleNotFoundError: Module not found: Error: Can't resolve '../../../assets/Roboto-Medium.ttf' in 'C:\Users\ivan\Desktop\myProject\.linaria-cache\src\ui\styles'

Removing the quotes, eg using src: url(../../../assets/Roboto-Medium.ttf); fixes the issue.

Reproducible Demo

The whole snippet:

import { css } from 'linaria';

export const fonts = css`
  :global() {
    @font-face {
      font-family: 'Roboto';
      font-display: block;
      src: url(../../../assets/Roboto-Medium.ttf);
      font-weight: 700;
    }

    @font-face {
      font-family: 'Roboto';
      font-display: block;
      src: url(../../../assets/Roboto-Medium.ttf);
      font-weight: 500;
    }

    @font-face {
      font-family: 'Roboto';
      font-display: block;
      src: url(../../../assets/Roboto-Regular.ttf);
      font-weight: 400;
    }

    @font-face {
      font-family: 'RobotoMono';
      font-display: block;
      src: url(../../../assets/RobotoMono-Regular.ttf);
      font-weight: 400;
    }
  }
`;