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localstorage-migrator

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localstorage-migrator - npm Package Compare versions

Comparing version 1.0.7 to 1.0.8

2

package.json
{
"name": "localstorage-migrator",
"version": "1.0.7",
"version": "1.0.8",
"description": "A library for applying migrations to localstorage.",

@@ -5,0 +5,0 @@ "main": "lib/index.js",

@@ -15,8 +15,13 @@ # LocalStorage Migrator

A migration is an object that consist of two items:
- name: This has to be unique
- up: a method that is called when applying the migration.
- name: This has to be unique
- up: a method that is called when applying the migration.
Example:
```typescript
import * as migrator from "localstorage-migrator";
const objectKey = "someKey";
const migrations = [

@@ -27,5 +32,5 @@ {

localStorage.setItem(
"hei",
objectKey,
JSON.stringify({
hei: "1"
name: "John Doe"
})

@@ -38,5 +43,5 @@ );

up: () => {
var object = JSON.parse(localStorage.getItem("hei") as string);
object.num = 2;
localStorage.setItem("hei", JSON.stringify(object));
var object = JSON.parse(localStorage.getItem(objectKey) as string);
object.age = 2;
localStorage.setItem(objectKey, JSON.stringify(object));
}

@@ -47,5 +52,5 @@ },

up: () => {
var object = JSON.parse(localStorage.getItem("hei") as string);
object.num++;
localStorage.setItem("hei", JSON.stringify(object));
var object = JSON.parse(localStorage.getItem(objectKey) as string);
object.age++;
localStorage.setItem(objectKey, JSON.stringify(object));
}

@@ -57,8 +62,8 @@ }

before local storage is accessed by other code. */
export function runMigrations() : void {
migrator.migrate(migrations);
export function runMigrations(): void {
migrator.migrate(migrations);
}
```
An example project can be found on GitHub:
An example project can be found on GitHub:
https://github.com/ragnarstolsmark/migratortest

@@ -69,2 +74,3 @@

### migrate
The migrate method takes a an array of migrations, filters them by those who have already been applied and executes them in sequence. The applied migrations is then stored in local storage under a key called: "appliedMigrations".

@@ -75,8 +81,8 @@

This returns an array of those appliedMigrations that have been stored in local storage. They are returned in the order they was applied. An appliedMigration consist of:
- name: The name of the migration that has been applied
- dateApplied: The date the migration was applied
- name: The name of the migration that has been applied
- dateApplied: The date the migration was applied
#### storeAppliedMigrations
This takes an array of appliedMigration objects and stores them in local storage. This can work like a reset method when calling it with an empty array.
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