fix: unminified build breaks __vitePreload

[ygj6]

Description

close #5753

When there are comments in dynamic import, e.g.

import(/*not following dependency*/'./App.vue')

We will get url = /*not following dependency*/ "./App.vue" , which does not meet the conditions:

if (url[0] === `"` && url[url.length - 1] === `"`) {

In fact es-module-lexer will return a .n field containing the escaped url, which is ./App.vue in this example.
So we can use the .n field first.

Additional context

https://github.com/guybedford/es-module-lexer/blob/c5cdb28d848c91e9296bbcf9a17196f230f68a5f/types/lexer.d.ts#L2-L22

 /**
   * Module name
   * 
   * To handle escape sequences in specifier strings, the .n field of imported specifiers will be provided where possible.
   * 
   * For dynamic import expressions, this field will be empty if not a valid JS string.
   * 
   * @example
   * const [imports1, exports1] = parse(String.raw`import './\u0061\u0062.js'`);
   * imports1[0].n;
   * // Returns "./ab.js"
   * 
   * const [imports2, exports2] = parse(`import("./ab.js")`);
   * imports2[0].n;
   * // Returns "./ab.js"
   * 
   * const [imports3, exports3] = parse(`import("./" + "ab.js")`);
   * imports3[0].n;
   * // Returns undefined
   */
  readonly n: string | undefined;

---

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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[patak-dev]

I love your PRs @ygj6 ❤️

[Shinigami92]

I love your PRs @ygj6 ❤️

⬆️ What @patak-js says ❤️