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Can't use Dexie in react-native #1473

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aguycalled opened this issue Jan 9, 2022 · 2 comments
Closed

Can't use Dexie in react-native #1473

aguycalled opened this issue Jan 9, 2022 · 2 comments

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@aguycalled
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aguycalled commented Jan 9, 2022

I am trying to use a library in react-native which depends on Dexie. By using indexededdbshim I intend to have react-native-sqlite-2 as backend instead of IndexedDB.

import SQLite from 'react-native-sqlite-2';
import setGlobalVars from 'indexeddbshim/dist/indexeddbshim-noninvasive';
global.window = global;

setGlobalVars(null, {
  checkOrigin: false,
  win: SQLite,
  deleteDatabaseFiles: false,
  useSQLiteIndexes: true
});

Independently of the use of the indexeddbshim strategy, I see this error:

ReferenceError: Can't find variable: addEventListener

image

Any clue on how to solve it?

@codemaster115
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codemaster115 commented Feb 14, 2022

I am also getting the same issue on React-Native(version 0.67).

@cmpayc
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cmpayc commented Apr 27, 2022

The problem is in the incomplete condition:

} else if (typeof self !== 'undefined' && typeof navigator !== 'undefined') {
// DOM verified - when typeof self !== "undefined", we are a window or worker. Not a Node process.
//
// Propagate local changes to remote tabs/windows via storage event and service worker
// via messages. We have this code here because of https://bugs.webkit.org/show_bug.cgi?id=161472.
//
globalEvents(DEXIE_STORAGE_MUTATED_EVENT_NAME, (changedParts) => {
try {
if (!propagatingLocally) {
if (typeof localStorage !== 'undefined') {
// We're a browsing window or tab. Propagate to other windows/tabs via storage event:
localStorage.setItem(
STORAGE_MUTATED_DOM_EVENT_NAME,
JSON.stringify({
trig: Math.random(),
changedParts,
})
);
}
if (typeof self['clients'] === 'object') {
// We're a service worker. Propagate to our browser clients.
[...self['clients'].matchAll({ includeUncontrolled: true })].forEach(
(client) =>
client.postMessage({
type: STORAGE_MUTATED_DOM_EVENT_NAME,
changedParts,
})
);
}
}
} catch {}
});
//
// Propagate remote changes locally via storage event:
//
addEventListener('storage', (ev: StorageEvent) => {

react-native has a navigator and self properties but no addEventListener function.

Thus, it is necessary to add additional checks on addEventListener, as is done in the file propagate-locally.ts:

if (typeof dispatchEvent !== 'undefined' && typeof addEventListener !== 'undefined') {
globalEvents(DEXIE_STORAGE_MUTATED_EVENT_NAME, updatedParts => {
if (!propagatingLocally) {
let event: CustomEvent<ObservabilitySet>;
if (isIEOrEdge) {
event = document.createEvent('CustomEvent');
event.initCustomEvent(STORAGE_MUTATED_DOM_EVENT_NAME, true, true, updatedParts);
} else {
event = new CustomEvent(STORAGE_MUTATED_DOM_EVENT_NAME, {
detail: updatedParts
});
}
propagatingLocally = true;
dispatchEvent(event);
propagatingLocally = false;
}
});
addEventListener(STORAGE_MUTATED_DOM_EVENT_NAME, ({detail}: CustomEvent<ObservabilitySet>) => {

For example:

} else if (
  typeof self !== 'undefined' &&
  typeof navigator !== 'undefined' &&
  typeof addEventListener !== 'undefined'
) { 

dfahlander added a commit that referenced this issue Apr 27, 2022
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