How to implement localStorage storage and reading JSON

This time I will show you how to read JSON from localStorage storage. What are the precautions for reading JSON from localStorage storage? The following is a practical case, let's take a look.

local storage on the client side, but the localStorage method can only store string data. Sometimes we need to store ObjectTo local, for example: JSON; then, how can localStorage realize the storage and reading of JSON data? Idea: Since localStorage can only store string data, we can first convert the JSON object into a string, and then store it using the localStorage method; when we need to use these JSON data, read them first Take it out and then convert it into a JSON object for use.

The specific code is as follows:

var jsonData = {'name': '张三', 'age': 29}; // 定义一个JSON对象
var str_jsonData = JSON.stringify(jsonData);
console.log(typeof(str_jsonData)); // string
localStorage.setItem('localData', str_jsonData); // 存储字符串数据到本地
var getLocalData = localStorage.getItem('localData'); // 读取字符串数据
console.log(typeof(getLocalData)); // string
var jsonObj = JSON.parse(getLocalData);
console.log(typeof(jsonObj)); // obj
console.log(jsonObj.age); // 29

Extension:

stringify() is used to parse a string from an object;

parse() is used to parse a string from an object Parse a json object from a string.

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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