Javascript范围：回调函数引发“今天不是函数”

Question

I wrote the following code and didn't want to repeat the function (today) twice so I tried writing it within the callback function afterAdd but it didn't work. Why can't it be detected by the callback function?

 <script type="text/javascript"> var today = $(document).ready( function() { var todayDate = new Date(); todayDate.setMinutes(todayDate.getMinutes() - todayDate.getTimezoneOffset()); $('input[name="purchase_date"]').val(todayDate.toISOString().slice(0,10)); }); $(".addform .repeatable").repeatable({ addTrigger: ".add", deleteTrigger: ".del", template: "#form_item", afterAdd: today }); </script> 

Answer 1

First create today as a function. Then call $(document).ready(today) , and also use today in your code as per normal:

var today = function() {
  var todayDate = new Date();
  todayDate.setMinutes(todayDate.getMinutes() - todayDate.getTimezoneOffset());
  $('input[name="purchase_date"]').val(todayDate.toISOString().slice(0, 10));
};
$(document).ready(today);
$(".addform .repeatable").repeatable({
  addTrigger: ".add",
  deleteTrigger: ".del",
  template: "#form_item",
  afterAdd: today
});

Answer 2

Replace

var today = $(document).ready( function() {
    var todayDate = new Date();
    todayDate.setMinutes(todayDate.getMinutes() - 
    todayDate.getTimezoneOffset());
    $('input[name="purchase_date"]').val(todayDate.toISOString().slice(0,10));
});

with

var today = function() {
    var todayDate = new Date();
    todayDate.setMinutes(todayDate.getMinutes() - 
    todayDate.getTimezoneOffset());
    $('input[name="purchase_date"]').val(todayDate.toISOString().slice(0,10));
};
$(document).ready(function() {
    today();
});

This will create the function 'today' and run it when the document is ready.