[英]What is the correct way to extend a class defined in a JavaScript Universal Module (UMD file)
I've made a first attempt at a custom log "appender" for log4javascript . 我已经首次尝试为log4javascript创建自定义日志“ appender”。 It works, but it is stuck inside the original code. 它可以工作,但是卡在原始代码中。 I want to keep my extension in a separate file, but I don't understand the rest code well enough to know how to extract it. 我想将扩展名保存在一个单独的文件中,但是我对其余代码的了解不够深,无法知道如何提取它。
I understand that log4javascript respects the UMD pattern somehow, but that's as far as I have got. 我了解到log4javascript某种程度上尊重UMD模式,但据我所知。
(Although shouldn't it be... (虽然不应该...
(function(root, factory){})(this, function{})... (function(root,factory){})(this,function {})...
... instead of ... ... 代替 ...
(function(factory, root){})(function{}) (函数(工厂,根){})(函数{})
... ????*) ... ???? *)
(function(factory, root) {
if (typeof define == "function" && define.amd) {
define(factory);
}
else if (typeof module != "undefined" && typeof exports == "object") {
module.exports = factory();
}
else {
root.log4javascript = factory();
}
})(function() {
:
Here be dragons . . .
:
/* -- - this code works from here, but not if I - -- */
/* -- - try to move it out to a file of its own - -- */
function MyAppender() {}
MyAppender.prototype = new Appender();
MyAppender.prototype.layout = new SimpleLayout();
MyAppender.prototype.append = function(loggingEvent) {
alert( this.getLayout().formatWithException(loggingEvent) );
};
MyAppender.prototype.toString = function() {
return "MyAppender";
};
log4javascript.MyAppender = MyAppender;
/* -- - - - - - - - - - - - -- */
:
. . . and sea monsters
:
return log4javascript;
}, this);
How can I subclass Appender in a separate file? 如何将Appender放在单独的文件中?
Since posting a few hours ago, I've been reading more about UMD, AMD, requireJS, etc. 自几个小时前发布以来,我一直在阅读有关UMD,AMD,requireJS等的更多信息。
The main issue is name space purity, it seems. 似乎主要的问题是名称空间的纯度。
Having figured that out, all I had to do was solve the name space problem. 弄清楚了之后,我所要做的就是解决名称空间问题。 It turns out to be stupidly easy: it's right there in the code! 事实证明这很容易:代码就在其中! Duh! 咄! : :
log4javascript.MyAppender = MyAppender; log4javascript.MyAppender = MyAppender;
Instead of . 代替 。 . 。 . 。
MyAppender.prototype = new Appender();
MyAppender.prototype.layout = new SimpleLayout();
... I just had to do ... ...我只需要做...
MyAppender.prototype = new log4javascript.Appender();
MyAppender.prototype.layout = new log4javascript.SimpleLayout();
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