如何在 jQuery 中创建和调用自定义函数
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how to create and call a custom function in jQuery
提问by user1911703
I need to create a simple function in jQuery which will call within other few functions
我需要在 jQuery 中创建一个简单的函数，它将在其他几个函数中调用
$(document).ready(function() {
function reload_cart() {
alert('reload cart called');
}
});
$(document).ready(function() {
reload_cart(); //i need to call from here.
});
$(document).ready(function() {
$('a.add_to_cart').live('click', function (e) {
reload_cart(); //i need to call from here.
});
});
The error I get in firebug: reload_cart() is not defined.
我在萤火虫中得到的错误：reload_cart() is not defined。
回答by Blender
reload_cartis local to your first $(document).ready()callback. You can't call it from an outside scope.
reload_cart是您的第一个$(document).ready()回调的本地。您不能从外部范围调用它。
You should merge your functions together:
您应该将您的功能合并在一起：
$(document).ready(function() {
function reload_cart() {
alert('reload cart called');
}
reload_cart();
$('a.add_to_cart').live('click', function(e) {
reload_cart();
});
});
An even better solution would be to create a cartobject, add reloadto its prototype, and initialize it outside of all of the callbacks.
一个更好的解决方案是创建一个cart对象，添加reload到它的原型，并在所有回调之外初始化它。
回答by ced-b
Yes, because you declared the function within the scope of the first $(document).ready(function(){})so it will not be available outside of that functions scope.
是的，因为您在第一个范围内声明了该函数，$(document).ready(function(){})因此它在该函数范围之外将不可用。
I am not sure why you would call $(document).ready()more than once. Try this:
我不知道为什么你会$(document).ready()不止一次打电话。尝试这个：
$(document).ready(function(){
function reload_cart() {
alert('reload cart called');
}
reload_cart(); //i need to call from here.
$('a.add_to_cart').live('click', function(e) {
reload_cart(); //i need to call from here.
});
});
Alternatively you can also declare your function outside of $(document).ready()and it will be globally available.
或者，您也可以在外部声明您的函数$(document).ready()，它将在全球范围内可用。
回答by Akhil Sekharan
Put your function definition:
把你的函数定义：
function reload_cart() {
alert('reload cart called');
}
Outside document.ready.
外部文档。准备好了。
Currently, Its scoped inside the document.ready handler only.
目前，它的范围仅限于 document.ready 处理程序。
$(document).ready(function(){
//reload_cart is only available here
function reload_cart() {
alert('reload cart called');
}
});
