jquery - jQuery .on keyup and blur firing onload only

Question

Problem: The blur and keyup events each fire once onload, and only onload. How can I get them to work correctly?

jQuery:

function myFunction(text){
    alert(text);
}
$('#input1').on({
    keyup: myFunction('keyup'),
    blur: myFunction('blur'),
    focus: function(){console.log('focus!');}
});

Fiddle: https://jsfiddle.net/GrMQX/

Answer 1

您没有将函数分配给keyupand blur，而是将执行结果分配给myFunction.

像这样改变它：

$('#input1').on({
    keyup: function() { myFunction('keyup'); },
    blur:  function() { myFunction('blur'); },
    focus: function() { console.log('focus!'); }
});

演示

Answer 2

您没有将函数声明为回调，而是在执行它们，并且它们的返回结果被分配为回调（这不起作用）。

尝试这个：

  $('#input1').on({
    keyup: function() { myFunction('keyup') },
    blur: function() { myFunction('blur') },
    focus: function(){console.log('focus!');}
  });

Answer 3

您需要将函数作为参数传递..您正在传递被调用函数的返回值

function myFunction(text){
    alert(text);
}
$('#input1').on({
    keyup: function(){myFunction('keyup');},
    blur: function(){myFunction('blur');},
    focus: function(){console.log('focus!');}
});

---

或者您可以将您的转换myFunction为函数发生器

function myFunction(text){
   return function(){
       console.log(text);
   }
}

$('#input1').on({
    keyup: myFunction('keyup'),
    blur: myFunction('blur'),
    focus: function(){console.log('focus!');}
});

演示在 https://jsfiddle.net/gaby/GrMQX/6/

Answer 4

当您以这种方式调用函数时，您实际上是在执行这些函数。尝试这个：

$('#input1').on({
    keyup: function(){myFunction('keyup')},
    blur: function(){myFunction('blur')},
    focus: function(){console.log('focus!');}
});

JSFiddle 示例

Answer 5

与 .on() 事件一起使用

$(document).on("keyup blur", "#input1", function(event)
    {       
    // your code        

    });