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feat(runtime-core): more specific warning for failed v-on fallthrough

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close #1001
This commit is contained in:
Evan You 2020-04-20 15:32:21 -04:00
parent e954ba21f0
commit ab844fd169
1 changed files with 6 additions and 1 deletions
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7
packages/runtime-core/src/componentRenderUtils.ts
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@ -107,11 +107,16 @@ export function renderComponentRoot(
root.patchFlag |= PatchFlags.FULL_PROPS root.patchFlag |= PatchFlags.FULL_PROPS
} }
} else if (__DEV__ && !accessedAttrs && root.type !== Comment) { } else if (__DEV__ && !accessedAttrs && root.type !== Comment) {
const hasListeners = Object.keys(attrs).some(isOn)
warn( warn(
`Extraneous non-props attributes (` + `Extraneous non-props attributes (` +
`${Object.keys(attrs).join(', ')}) ` + `${Object.keys(attrs).join(', ')}) ` +
`were passed to component but could not be automatically inherited ` + `were passed to component but could not be automatically inherited ` +
`because component renders fragment or text root nodes.` `because component renders fragment or text root nodes.` +
(hasListeners
? ` If the v-on listener is intended to be a component custom ` +
`event listener only, declare it using the "emits" option.`
: ``)
) )
} }
} }