今天是星期几的4种JS代码写法

第一种写法 代码如下:var str = “”; var week = new Date().getDay(); if (week == 0) { str = “今天是星期日”; } else if (week == 1) { str = “今天是星期一”; } else if (week == 2) { str = “今天是星期二”; } else if (week == 3) { str = “今天是星期三”; } else if (week == 4) { str = “今天是星期四”