localforage | 易学教程

are indexeddb/localforage reads resolved from a synchronous buffer?

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问题 Taking the following pseudo code localforageStore.setItem('foo', 'bar') .then(console.log('foo is persisted to disk')); localforageStore.getItem('foo') .then(v => console.info('foo is '+v)); // A, B or C? Is the console.info:- A. Guaranteed to display 'bar' B. Guaranteed to display 'undefined' C. Indeterminate i.e. even though the write to disc is async, will a synchronous read be resolved from a buffer internal to indexeddb and/or localforage? 回答1: I took a look at the localForage indexedDB

How do I assign a variable from localForage as I do in localStorage?

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问题 Please help me with the following. I have been converting my AngularJS application from localStorage to localForage. throughout my application I was assigning the localStorage value like this. window.localStorage.setItem('localSavedValue','SavedValue'); and then I was retrieving the data like this, var myValue = window.localStorage.getItem('localSavedValue'); So when I console.log(myValue); // it outputted 'SavedValue' I cannot seem to do this with localForage when I try, $localForage.setItem

How do I assign a variable from localForage as I do in localStorage?

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LocalForage size limit for an Ionic Mobile App

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问题 I'm building a mobile App using Ionic framework. My app heavily uses offline database. My first attempt was to use ngStorage which uses localStorage but after a while i hit the size quota limit which is about 5MB. So i took a look at angular-localForage , In there it says: Store your data in the best available storage solution that your browser can offer (IndexedDB / WebSQL or localstorage as a fallback) Now for my multi-platform Mobile App does it mean it's going to use IndexedDB which has a

客户端存储技术笔记

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 一、cookie 1.使用限制根据统计表明，每个域名50个、大小总计4KB的Cookie是安全的，更多的cookie使用需要进行评估。 2.通常的用法如： 1)写入cookie document.cookie = "name=value"; 指定过期时间和可以访问的域名 document.cookie = "name=Raymond; expires=Fri, 31 Dec 9999 23:59:59 GMT;domain=app.foo.com"; document.cookie = "age=43"; 2)读取cookie document.cookie "name=value;age=43" 得到以分号分隔的字符串二、web存储API 1.使用限制 1)Web存储有两个版本：本地存储（Local Storage）和会话存储（Session Storage）。两者使用完全相同的API，但本地存储会持久存在（或者直到用户清除），而会话存储只要浏览器关闭就会消失。Web存储API官方规范的网址为 http://www.w3.org/TR/webstorage。 2)Web存储是与域名一一对应的。和Cookie不同的是，无法让app.foo.com使用www.foo.com存储的数据。

localForage setItem/getItem unreliable in Firefox / FireStorage Plus

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问题 I am loading a local instance of localForage and using it with Promise chains to save basic data. A simple example: localforage.getItem("sellerExtension").then(function(sellerExtension) { if ((!sellerExtension) || (sellerExtension.length < 3)) { var sellerExtension = $('input#sellerExtension').val(); if ((sellerExtension) && (sellerExtension.length > 3)) { localforage.setItem('sellerExtension', sellerExtension).then( function() { }); } } }); The problem comes when I go into the FF Dev-Tools

Indexeddb seems to not free memory

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问题 I'm using localforage with its IndexedDB driver for storing simple key-value-pairs. But I encountered a problem when trying to remove or update values. Whenever I call localforage.removeItem("existingKey") or localforage.setItem("existingKey", "some value") with a key of an existing entry no memory is freed. When using WebSQL instead of IndexedDB the behavior does no occur. Example on JsBin (Only works in Chrome due to calls to navigator.storage ) 来源： https://stackoverflow.com/questions

IndexedDB size keeps growing even though data saved doesn't change

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问题 I am using Redux Persist and LocalForage in my web application. I have a series of actions that are fired upon login that update some data about the user. The IndexedDB size after all actions are fired and the data is saved in the JSON format on indexedDB is ~1.4Mb. However if I refresh the page thus triggering again the actions, or if log out and back in, even though the values inside IndexedDB DO NOT change (I have double checked with a JSON diff tool), the size of the storage keeps on