How to convert string to object in vuejs

Vuejs method of converting string to object: 1. Read the original data from the database table; 2. Convert the string into Just json object.

The operating environment of this article: windows7 system, vue2.9.6 version, DELL G3 computer.

How to convert string to object in vuejs?

vue.js converts String type to json format and json object to String:

When writing a vue project, due to the huge amount of data, the conversion format is relatively It's quite complicated, so I directly obtain the value from the form and store it in the database table in String format. However, when editing the record, I have to read it from the database table by id, and then display it on the page accordingly;

So: I will teach you how to convert String format to Json format in the vue project:

Let’s look at the data format stored in the database; this article takes the selections field as an example;


Next, I will demonstrate how the String format and json format are relatively converted
Some important demonstration codes of vue.js are attached:

editFormBuilder(row){
//aa bb cc 只是在方便调试更清楚的看到从数据库表中拿的数据
		//从数据库表中读取原数据，注意看数据格式
        console.log("aa",row.selections);
        
        //接下来，如何解析成json型
        this.temporary=JSON.parse(row.selections);//将字符串转换成json对象
        this.items=this.temporary;
        console.log("bb",this.items);
        
        //注意看，又把对象转换成String型
       this.flag=JSON.stringify(row.selections);//将json对象转换成字符串
        this.items=this.flg;
        console.log("cc",this.items);//再次转化格式！注意看
      },

Pay attention to the picture below! ! ! You will realize the charm of JSON.parse and JSON.stringify!

By the way, let me introduce the usage of the two functions in detail: [ps: For details, come to the novice tutorial and jump to the novice tutorial url]
(1) JSON.parse function:

作用：将json字符串转换成json对象

语法：JSON. parse(text[,reviver]).

参数：text  必须；一个有效的json字符串。

	reviver ：可选。

返回值：一个对象或数组。

(2)JSON.stringify() function:

	作用：将json对象转换成json字符串。

	语法：JSON.stringify(value [, replacer] [, space]) 

	参数：value  必须；通常为对象或数组。

		replacer：可选，用于转换结果的函数或者数组。

		space ：可选。向返回值 JSON 文本添加缩进、空格和换行符以使其更易于读取。 

	返回值：一个包含JSON文本的字符串。

Recommended learning: "The latest 5 vue.js video tutorial selections"

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