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dx(compiler-core): warn on <template v-for> key misplacement

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Note: the behavior is different from Vue 2. `<template v-for>` are compiled
into an array of Fragment vnodes so the key should be placed the `<template>`
for v-for to use it for diffing.
This commit is contained in:
Evan You
2020-08-04 12:20:32 -04:00
parent de0c8a7e3e
commit b0d01e9db9
3 changed files with 50 additions and 2 deletions
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2
packages/compiler-core/src/errors.ts
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@@ -67,6 +67,7 @@ export const enum ErrorCodes {
X_V_ELSE_NO_ADJACENT_IF,
X_V_FOR_NO_EXPRESSION,
X_V_FOR_MALFORMED_EXPRESSION,
X_V_FOR_TEMPLATE_KEY_PLACEMENT,
X_V_BIND_NO_EXPRESSION,
X_V_ON_NO_EXPRESSION,
X_V_SLOT_UNEXPECTED_DIRECTIVE_ON_SLOT_OUTLET,
@@ -140,6 +141,7 @@ export const errorMessages: { [code: number]: string } = {
[ErrorCodes.X_V_ELSE_NO_ADJACENT_IF]: `v-else/v-else-if has no adjacent v-if.`,
[ErrorCodes.X_V_FOR_NO_EXPRESSION]: `v-for is missing expression.`,
[ErrorCodes.X_V_FOR_MALFORMED_EXPRESSION]: `v-for has invalid expression.`,
[ErrorCodes.X_V_FOR_TEMPLATE_KEY_PLACEMENT]: `<template v-for> key should be placed on the <template> tag.`,
[ErrorCodes.X_V_BIND_NO_EXPRESSION]: `v-bind is missing expression.`,
[ErrorCodes.X_V_ON_NO_EXPRESSION]: `v-on is missing expression.`,
[ErrorCodes.X_V_SLOT_UNEXPECTED_DIRECTIVE_ON_SLOT_OUTLET]: `Unexpected custom directive on <slot> outlet.`,