SSR will always add a '/' before assets url even if the publicPath is empty

[meteorlxy]

Version

2.5.17-beta.0

Reproduction link

https://github.com/vuejs/vue/blob/2efc0446b3ac1f18fff8b59215e7b60d51c41965/src/server/template-renderer/index.js

Steps to reproduce

No need to repro, it's written in the code.

vue/src/server/template-renderer/index.js

Line 107 in 2efc044

? cssFiles.map(file => `<link rel="stylesheet" href="${this.publicPath}/${file}">`).join('')

vue/src/server/template-renderer/index.js

Lines 139 to 141 in 2efc044

	return `<link rel="preload" href="${
	this.publicPath}/${file
	}"${

vue/src/server/template-renderer/index.js

Line 160 in 2efc044

return `<link rel="prefetch" href="${this.publicPath}/${file}" as="script">`

vue/src/server/template-renderer/index.js

Line 184 in 2efc044

return `<script src="${this.publicPath}/${file}"></script>`

href="${this.publicPath}/${file}"
src="${this.publicPath}/${file}"

The publicPath of webpackConfig.output could be empty, and it is resonable.

What is expected?

• publicPath = '' generates assets/css/xxx
• publicPath = '/' generates/assets/css/xxx

They are rather different

What is actually happening?

• publicPath = '' and publicPath = '/' both generate /assets/css/xxx

---

So we could introduce an extra judgement for this.publicPath === ''

Or we could just use publicPath directly.