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fix(core): add `noSideEffects()` to `ɵɵdefineComponent()` (#35769) 

This marks the function are "pure" and eligible to be tree shaken by Closure. Without this, initializing `ngDevMode` is considered a side effect which prevents this function from being tree shaken and also any component which calls it.

PR Close #35769
This commit is contained in:
Doug Parker 2020-02-21 11:20:45 -08:00 committed by atscott
parent dc6a7918e3
commit ba3612774f
1 changed files with 51 additions and 51 deletions
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8
packages/core/src/render3/definition.ts
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@ -289,6 +289,7 @@ export function ɵɵdefineComponent<T>(componentDefinition: {
*/
schemas?: SchemaMetadata[] | null;
}): never {
return noSideEffects(() => {
// Initialize ngDevMode. This must be the first statement in ɵɵdefineComponent.
// See the `initNgDevMode` docstring for more information.
(typeof ngDevMode === 'undefined' || ngDevMode) && initNgDevMode();
@ -328,8 +329,8 @@ export function ɵɵdefineComponent<T>(componentDefinition: {
viewQuery: componentDefinition.viewQuery || null,
features: componentDefinition.features as DirectiveDefFeature[] || null,
data: componentDefinition.data || {},
// TODO(misko): convert ViewEncapsulation into const enum so that it can be used directly in the
// next line. Also `None` should be 0 not 2.
// TODO(misko): convert ViewEncapsulation into const enum so that it can be used directly in
// the next line. Also `None` should be 0 not 2.
encapsulation: componentDefinition.encapsulation || ViewEncapsulation.Emulated,
id: 'c',
styles: componentDefinition.styles || EMPTY_ARRAY,
@ -338,7 +339,6 @@ export function ɵɵdefineComponent<T>(componentDefinition: {
schemas: componentDefinition.schemas || null,
tView: null,
};
def._ = noSideEffects(() => {
const directiveTypes = componentDefinition.directives !;
const feature = componentDefinition.features;
const pipeTypes = componentDefinition.pipes !;
@ -353,9 +353,9 @@ export function ɵɵdefineComponent<T>(componentDefinition: {
def.pipeDefs = pipeTypes ?
() => (typeof pipeTypes === 'function' ? pipeTypes() : pipeTypes).map(extractPipeDef) :
null;
}) as never;
return def as never;
});
}
/**