如何在jQuery UI小部件工厂小部件中声明静态/类变量 [英] how to declare a static/class variable in a jquery ui widget factory widget

问题描述

关于jQuery ui小部件工厂...

Regarding the jquery ui widget factory...

拥有在所有实例之间共享的静态变量/类级别变量的最佳方法是什么?

What is the best way to have a static variable/class level variable that is shared amongst all instances?

例如

$.widget("ui.staticTest", {
    staticVar:'unchanged',
    test: function(a){
        if(a){
            this.staticVar= a;
        }
        alert(JSON.stringify(this.staticVar));
    }
});

$('#test').staticTest();
$('#parent').staticTest();

$('#test').staticTest('test','changed');
$('#parent').staticTest('test');

在上面的

中，如果staticVar是静态的，则$('#parent').staticTest('test');会提醒已更改"，但会提醒未更改".

in the above, if staticVar were static, $('#parent').staticTest('test'); would alert 'changed' but instead it alerts 'unchanged'.

(如果您想玩的话，此代码位于jsfiddle上: http://jsfiddle.net/alzclarke/Sx8pJ/)

(this code is on jsfiddle if you wanna have a play: http://jsfiddle.net/alzclarke/Sx8pJ/)

我能想到的解决方案很丑:

The solutions i can think of myself are ugly:

1)$('body').data('sharedVariable'，myData)-这似乎不是一个好习惯，如果有人或某物清除了数据主体该怎么办 2)将其存储在原型名称空间中= $ .ui.staticTest.prototype.staticVar = myData; 这也会敲响警钟

1) $('body').data('sharedVariable', myData) - this doesn't seem like good practice, what if someone or something clears the body of data 2) store it in the prototype namespace e.g. = $.ui.staticTest.prototype.staticVar = myData; this also rings alarm bells

推荐答案

关闭是您的答案

(function($) {

var staticVariable = '';

$.widget('ui.newWidget', {
    options: {

    },
    _init: function() {
    }

});

})(jQuery);

staticVariable仅在您定义的窗口小部件的范围内可用，因为它包装在立即调用的匿名函数中(就像您应该已经为jquery/jquery ui插件所做的那样.

staticVariable will only be available in the scope of the widget you just defined since it's wrapped up in a anonymous function that's called immediately (like you should already be doing for your jquery/jquery ui plugins.

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