Using eval to parse json instances in js and considerations _ javascript skills

Eval functions are of a lot of use in js. Next I will introduce eval's json parsing instance to all of you. Based on this instance, we will introduce some precautions for processing json data in eval, I hope this article will be helpful to you. JSON (JavaScript Object Notation) is a simple data format, which is lighter than xml. JSON is a JavaScript native format, which means that no special API or toolkit is required to process JSON data in JavaScript.
JSON rules are simple: the object is an unordered set of 'name/value' pairs. An object starts with "{" (left parenthesis) and ends with "}" (right Parenthesis. Each "name" is followed by a ":" (colon); "," (comma) is used to separate the "name/value" pairs.

Let's first look at a DNS instance.

The Code is as follows:

Eval functions parse json objects