js parses json several ways (including ES6 structure assignment)

1. First, the most common js parsing JSON method:

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var jsonData = {"name":"小埋","age":18};  
for(var key in jsonData){  
   console.log(key);//The key of the json object  
   console.log(jsonData[key]);//The value of the json object  
}

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2. Use the eval() function to convert it to a js object and then parse it:

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var json1 = {
	"array1" : [
		{'item1' : 1},
		{'item2' : 2}
	]
}
var obj1 = eval (json1);
console.log(obj1.array1[0]['item1']);

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3. Structure assignment in ES6:

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var json2 = {
	"name" : "umaru",
	"age" : 18,
	"array2" : [
		{"item" : 1},
		{"item" : 2}
	]
}
let {age,name,array2} = json2;
console.log(name + age + array2[0]['item']);

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Note: The value of the structure assignment object has nothing to do with the order, and is related to the variable name.