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chore: improve feature flag warning

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This commit is contained in:
Evan You 2021-09-23 14:04:52 -04:00
parent 1e5a0db4d4
commit c1cf26d207
1 changed files with 12 additions and 8 deletions
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20
packages/runtime-core/src/featureFlags.ts
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@ -8,24 +8,28 @@ import { getGlobalThis } from '@vue/shared'
* istanbul-ignore-next * istanbul-ignore-next
*/ */
export function initFeatureFlags() { export function initFeatureFlags() {
let needWarn = false const needWarn = []
if (typeof __FEATURE_OPTIONS_API__ !== 'boolean') { if (typeof __FEATURE_OPTIONS_API__ !== 'boolean') {
needWarn = true __DEV__ && needWarn.push(`__VUE_OPTIONS_API__`)
getGlobalThis().__VUE_OPTIONS_API__ = true getGlobalThis().__VUE_OPTIONS_API__ = true
} }
if (typeof __FEATURE_PROD_DEVTOOLS__ !== 'boolean') { if (typeof __FEATURE_PROD_DEVTOOLS__ !== 'boolean') {
needWarn = true __DEV__ && needWarn.push(`__VUE_PROD_DEVTOOLS__`)
getGlobalThis().__VUE_PROD_DEVTOOLS__ = false getGlobalThis().__VUE_PROD_DEVTOOLS__ = false
} }
if (__DEV__ && needWarn) { if (__DEV__ && needWarn.length) {
const multi = needWarn.length > 1
console.warn( console.warn(
`You are running the esm-bundler build of Vue. It is recommended to ` + `Feature flag${multi ? `s` : ``} ${needWarn.join(', ')} ${
`configure your bundler to explicitly replace feature flag globals ` + multi ? `are` : `is`
`with boolean literals to get proper tree-shaking in the final bundle. ` + } not explicitly defined. You are running the esm-bundler build of Vue, ` +
`See http://link.vuejs.org/feature-flags for more details.` `which expects these compile-time feature flags to be globally injected ` +
`via the bundler config in order to get better tree-shaking in the ` +
`production bundle.\n\n` +
`For more details, see http://link.vuejs.org/feature-flags.`
) )
} }
} }