From e05ac24cb76dc66cb879ba8e078f71e8ada3f0e1 Mon Sep 17 00:00:00 2001
From: Du Wei <hezedu@hotmail.com>
Date: Sun, 24 Jan 2021 10:53:23 +0800
Subject: [PATCH] Create 0000-data-store.md

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+- Start Date: 2021-01-24
+- Target Major Version: 3.4.9
+- Reference Issues: https://github.com/vuejs/vue-router/issues/3452
+- Implementation PR: (leave this empty)
+
+# Summary
+Maintain a store by history state key. Can be used to save something.
+
+
+# Basic example
+
+[Online Demo](https://hezedu.github.io/SomethingBoring/vue-router-positionstore-memory-leak/pr-demo.html#/)
+# Motivation
+
+Unlike [window.history](https://developer.mozilla.org/en-US/docs/Web/API/History), vue-router has no API to change history.state.
+
+But sometimes we need it to store some unique keys, like the `positionStore`. <br>
+So I replaced `positionStore` with `dataStore`. This way you can store more things. <br>
+
+# Detailed design
+
+<b>Fixed:</b> [#3445: vue-router positionStore memory leak](https://github.com/vuejs/vue-router/issues/3445)
+
+<b>reconstruct:</b> `util/state-key`
+
+## New API
+### router.setData(key, data)
+  - `key` ___string___
+  - `data` ___any___
+### router.getData(key)
+  - `key` ___string___ 
+  - Returns: ___any___
+### router.removeData(key)
+  - `key` ___string___
+
+
+
+# Adoption strategy
+Expose three new APIs, And there is no need to develop `state` related APIs in the future.
+
+