我正在尝试开发一个插件,它将回调作为init的第一个参数。我试图修改官方tutorial的插件代码。我无法弄清楚为什么这里有什么问题:
插件:
(function( $ ){
var methods = {
init : function( callback, options ) {
// Create some defaults, extending them with any options that were provided
var settings = $.extend( {
'location' : 'top',
'background-color' : 'blue'
}, options);
return this.each(function() {
$this.click(function(e) {
e.stopPropagation();
var $target = $(e.target);
if (callback)
callback($target);
});
});
},
};
$.fn.myplugin = function( method ) {
// Method calling logic
if ( methods[method] ) {
return methods[ method ].apply( this, Array.prototype.slice.call( arguments, 1 ));
} else if ( typeof method === 'object' || ! method ) {
return methods.init.apply( this, arguments );
} else {
$.error( 'Method ' + method + ' does not exist on jQuery.myplugin' );
}
};
})( jQuery );
调用插件:
// Create callback function
var callback = function(){alert('hey');};
$('#my-control').myplugin(callback,{'width':'600px'});
错误:
方法函数(){alert('hey');}在jQuery.myplugin上不存在
答案 0 :(得分:2)
这一行:
else if ( typeof method === 'object' || ! method ) {
导致$.error
条件(在下一个else
子句中)被触发,因为您正在检查方法名称或选项对象,并且没有考虑传入参数类型功能。
我建议改为callback
对象的options
选项部分:
(function($) {
var methods = {
init: function(options) {
console.dir(arguments);
// Create some defaults, extending them with any options that were provided
var settings = $.extend({
'location': 'top',
'background-color': 'blue'
}, options);
return this.each(function() {
$(this).click(function(e) {
e.stopPropagation();
var $target = $(e.target);
if (settings.callback) settings.callback($target);
});
});
},
};
$.fn.myplugin = function(method) {
// Method calling logic
if (methods[method]) {
return methods[method].apply(this, Array.prototype.slice.call(arguments, 1));
} else if (typeof method === 'object' || !method) {
return methods.init.apply(this, arguments);
} else {
$.error('Method ' + method + ' does not exist on jQuery.myplugin');
}
};
})(jQuery);
用法:
var callback = function(){alert('hey');};
$('#my-control').myplugin({'width':'600px', callback: callback});