(Document that) template rendering omits non-first tags

[robinp]

Expected behavior

Not sure if this is a main Vue doc issue, or only rollup-plugin-vue's. But it seems templates need a single root elem, and other elems are lost. Would be nice if the plugin could at least emit a warning about this.

Steps to reproduce the behavior

.vue file with:

<template>
  <h1>x</h1>
  <h2>y</h2>
</template>

rollup:

vue({compileTemplates:true})

[tedmeftah]

Yes it's Vue related

Component template should contain exactly one root element. If you are using v-if on multiple elements, use v-else-if to chain them instead.

I can't seem to find the exact passage on the Vue 2.0 docs page though there is a mention of it here.

[znck]

I think throwing a warning at compile time would work here.

[znck]

@vue/component-compiler-utils provides tips on issues with template. These tips and errors are logged out.

Should be resolved with v4+.