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  • [ES6] 16. Object Enhancements

    Define object


    var color = "blue";
    var speed = 120;
    
    var car = {color, speed};
    
    console.log(car.color);  // blue
    console.log(car.speed);  // 120

     in ES5: 

    var car = {color: color, speed: speed};

    works with function


    var color = "blue";
    var speed = 120;
    function go(){
        console.log("start");
    }
    
    var car = {color, speed, go};
    
    console.log(car.color); //blue
    console.log(car.speed); //120
    car.go(); // start

    define function inside object:


    var color = "blue";
    var speed = 120;
    
    var car = {
        color,
        speed,
        go(){
            console.log("start");
        }
    };
    
    console.log(car.color); //blue
    console.log(car.speed); //120
    car.go(); // start

    in ES5:

    var car = {
        color,
        speed,
        go: function(){
            console.log("start");
        }
    };

    get computed property:


    var color = "blue";
    var speed = 120;
    
    var car = {
        color,
        speed,
        ["go"]: function(){
            console.log("start");
        }
    };
    
    console.log(car.color); //blue
    console.log(car.speed); //120
    car.go(); // start

    The same as:

    car["go"](); // start

    string concatenation or evaluation


    var color = "blue";
    var speed = 120;
    var drive = "go";
    var car = {
        color,
        speed,
        [drive]: function(){
            console.log("start");
        }
    };
    
    console.log(car.color); //blue
    console.log(car.speed); //120
    car.go(); // start
    car["go"](); // start
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  • 原文地址:https://www.cnblogs.com/Answer1215/p/4197893.html
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