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Do not use function name to track components (#6542)

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UglifyJS2 is allowed to mangle function names, and function names can also
be duplicate if they are from different scopes. Therefore function names
are not reliable as identifiers.

Functions as keys for Map object is a cheaper and more reliable
alternative.
This commit is contained in:
Akihiko Odaki 2018-02-25 03:10:57 +09:00 committed by Eugen Rochko
parent 4d8c0d9959
commit 7cb49eaa3a
1 changed files with 5 additions and 6 deletions
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11
app/javascript/mastodon/features/ui/components/bundle.js
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@ -26,7 +26,7 @@ class Bundle extends React.Component {
onFetchFail: noop, onFetchFail: noop,
} }
static cache = {} static cache = new Map
state = { state = {
mod: undefined, mod: undefined,
@ -51,13 +51,12 @@ class Bundle extends React.Component {
load = (props) => { load = (props) => {
const { fetchComponent, onFetch, onFetchSuccess, onFetchFail, renderDelay } = props || this.props; const { fetchComponent, onFetch, onFetchSuccess, onFetchFail, renderDelay } = props || this.props;
const cachedMod = Bundle.cache.get(fetchComponent);
onFetch(); onFetch();
if (Bundle.cache[fetchComponent.name]) { if (cachedMod) {
const mod = Bundle.cache[fetchComponent.name]; this.setState({ mod: cachedMod.default });
this.setState({ mod: mod.default });
onFetchSuccess(); onFetchSuccess();
return Promise.resolve(); return Promise.resolve();
} }
@ -71,7 +70,7 @@ class Bundle extends React.Component {
return fetchComponent() return fetchComponent()
.then((mod) => { .then((mod) => {
Bundle.cache[fetchComponent.name] = mod; Bundle.cache.set(fetchComponent, mod);
this.setState({ mod: mod.default }); this.setState({ mod: mod.default });
onFetchSuccess(); onFetchSuccess();
}) })