Javascript uses JSON as an argument to the function

// Common method
function commonArg(name,age,desc){
    var userinfo="name: "+name+","+"age: "+age+"\ndescription: "+desc;
    alert(userinfo);
}
commonArg("yemoo".22."a boy!")
// Defects: 1. If there are too many parameters, the length in parentheses is too long
// 2. The parameters can be transmitted only in the order of the parameters. Otherwise, the returned information is incorrect
// 3. If you do not want to pass the parameter, you need to set null

//JSON parameter transmission mode
function JsonArg(json){
    this.name = json.name;
    this.age = json.age;
    this.desc = json.desc;
}
JsonArg.prototype.user = function(){
    console.log('name:'+this.name+'age:'+ this.age + 'features:+ (this.desc||empty));
}
var jsonArg1 = new JsonArg({name:'chen'.age:20.desc:'It's a man'});
var jsonArg2 = new JsonArg({name:'chen'.age:20});
jsonArg1.user();
jsonArg2.user();
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• You can reduce the number of arguments passed in. All you have to do is pass one in
• Since JSON has a key value, there is no need for pastoralist order when passing arguments
• You only need to pass in the required parameters each time
• JSON, try to use a single layer structure