JavaScript之链式调用this箭头函数

Posted 2022-03-01 web半晨

var sched = 
    a: function() 
        console.log('a');
        return this;
    ,
    b: function() 
        console.log('b');
        return this;
    ,
    c: () => 
        console.log('c');
        return this;
    ,
    d: () => 
        console.log('d');
        return this;
    ,
;

sched.a().b().c().d();
// 调用d的时候报错
// 因为在箭头函数中this的固定指向
// Uncaught TypeError: sched.a(...).b(...).c(...).d is not a function