turtlestitch/libraries/localstorage_module.xml

<blocks app="Snap! 6, https://snap.berkeley.edu" version="1"><block-definition s="store key: %&apos;key&apos; value: %&apos;value&apos; in browser" type="command" category="other"><header></header><code></code><translations></translations><inputs><input type="%s"></input><input type="%s"></input></inputs><script><block s="doRun"><block s="reportJSFunction"><list><l>key</l><l>value</l><l>proc</l></list><l>proc.assertType(key, [&apos;text&apos;, &apos;number&apos;]);&#xD;proc.assertType(value, [&apos;text&apos;, &apos;number&apos;]);&#xD;window.localStorage.setItem(&apos;-snap-project-&apos; + key, &apos;&apos; + value);</l></block><list><block var="key"/><block var="value"/></list></block></script></block-definition><block-definition s="stored data in browser" type="reporter" category="other"><header></header><code></code><translations></translations><inputs></inputs><script><block s="doReport"><block s="evaluate"><block s="reportJSFunction"><list></list><l>var str = window.localStorage,&#xD;    len = str.length,&#xD;    result = [],&#xD;    key,&#xD;    i;&#xD;for (i = 0; i &lt; len; i += 1) {&#xD;  key = str.key(i);&#xD;  if (key.startsWith(&apos;-snap-project-&apos;)) {&#xD;    result.push(new List([key.slice(14), str.getItem(key)]));&#xD;  }&#xD;}&#xD;return new List(result);</l></block><list></list></block></block></script></block-definition><block-definition s="remove key: %&apos;key&apos; in browser" type="command" category="other"><header></header><code></code><translations></translations><inputs><input type="%s"></input></inputs><script><block s="doRun"><block s="reportJSFunction"><list><l>key</l><l>proc</l></list><l>proc.assertType(key, [&apos;text&apos;, &apos;number&apos;]);&#xD;window.localStorage.removeItem(&apos;-snap-project-&apos; + key);</l></block><list><block var="key"/></list></block></script></block-definition><block-definition s="clear data in browser" type="command" category="other"><header></header><code></code><translations></translations><inputs></inputs><script><block s="doWarp"><script><block s="doForEach"><l>item</l><custom-block s="stored data in browser"></custom-block><script><custom-block s="remove key: %s in browser"><block s="reportListItem"><l>1</l><block var="item"/></block></custom-block></script></block></script></block></script></block-definition></blocks>