调用未定义
我正在尝试设置我的插件以接受内部回调函数作为选项参数：
(function($) {
$.fn.MyjQueryPlugin = function(options) {
var defaults = {
onEnd: function(e) {}
};
var settings = $.extend({}, defaults, options);
return this.each(function() {
// do stuff (complete() gets called here)
});
};
function complete(e){
settings.onEnd.call(this); // <- the error?
}
})(jQuery);
但我收到一个错误，指出 call() 未定义。我的代码有什么问题吗？
好的，我将其更改为：
(function($) {
$.fn.MyjQueryPlugin = function(options) {
var defaults = {
onEnd: function(e) {}
};
var settings = $.extend({}, defaults, options);
var complete = function(e){
settings.onEnd.call(this); // <- the error?
}
return this.each(function() {
// do stuff (complete() gets called here)
});
};
})(jQuery);
并且错误仍然存在......
I'm trying to set up my plugin to accept a callback function inside as a option argument:
(function($) {
$.fn.MyjQueryPlugin = function(options) {
var defaults = {
onEnd: function(e) {}
};
var settings = $.extend({}, defaults, options);
return this.each(function() {
// do stuff (complete() gets called here)
});
};
function complete(e){
settings.onEnd.call(this); // <- the error?
}
})(jQuery);
But I get a error that call() is undefined. What's wrong with my code?
ok, I changed this with:
(function($) {
$.fn.MyjQueryPlugin = function(options) {
var defaults = {
onEnd: function(e) {}
};
var settings = $.extend({}, defaults, options);
var complete = function(e){
settings.onEnd.call(this); // <- the error?
}
return this.each(function() {
// do stuff (complete() gets called here)
});
};
})(jQuery);
and the error is still there...
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评论（3）
您试图在定义它的函数之外引用
settings。您已将settings范围限定为您分配给$.fn.MyjQueryPlugin的函数内的局部变量，但随后您从一个不支持该变量的函数中使用它关闭该局部变量。您可以为每次调用
MyjQueryPlugin创建一个新的complete函数，该函数通过settings关闭：...但是涉及创建函数的课程。也许这很好，取决于插件的作用。
或者，将
settings作为参数传递到complete中。You're trying to reference
settingsoutside of the function in which it's defined. You've scopedsettingsto be a local variable within the function you assign to$.fn.MyjQueryPlugin, but then you're using it from a function that doesn't close over that local variable.You could create a new
completefunction for every call toMyjQueryPluginthat closes oversettings:...but of course that involves creating a function. Maybe that's fine, depends on what the plug-in does.
Alternately, pass
settingsintocompleteas an argument.settings不在complete()内部的范围内。settingsis not in scope inside ofcomplete().变量设置超出了完整函数的范围。将完整的函数放置在已定义设置的函数中。
the variable settings is out of scope in the complete function. Place the complete function in the function where you have defined settings.