A.new Date(’2019-1-1’) B.new Date(’2019/1/1’) C.new Date(’2019,1,1’) D.new Date(’2019.1.1’)
var target = {}; var user = Object.assign(target, {name:'lili',age:10,address:'山東'}, {age:18,name:'zs'}); console.log(target)以下打印的結(jié)果正確的是()
A.{name:"lili",age:10,address:"山東"} B.{name:"zs",age:18,address:"山東"} C.{name:"zs",age:18} D.{}
下列程序的輸出是:()。 function Ball() { } Ball.prototype = { colors:['green','yellow'] } var ball1 = new Ball() var ball2 = new Ball() ball1.colors.push('blue') console.log(ball2.colors)
A.[’green,’yellow’] B.[’green,’yellow’,’blue’] C.undefined D.以上都不對