Ext文档的缺点

Ext文档就是鸡肋。

在你不懂Ext的时候,这些文档很有帮助。当你已经很熟悉Ext想要使用一些高级功能时,你发现Ext文档很垃圾。比如,你找不到关于ColumnModel.renderer方法的详细信息。

看看文档的描述:
listeners : Object
(optional) A config object containing one or more event handlers to be added to this object during initialization. This should be a valid listeners config object as specified in the addListener example for attaching multiple handlers at once.

简直毫无意义。实际上,该方法接受6个参数:

renderer(value, cellmeta, record, rowIndex, columnIndex, store) {
}

再举一例,
addEvents( Object object ) : void
Used to define events on this Observable
Used to define events on this Observable
Parameters:

object : Object
The object with the events defined
Returns:

void

完全没有告诉大家该参数的可能形式,例如数组。另外,eventname不能是大小混合,系统接受大小写的事件名称,但默认转换成小写。可hasListener不处理大小写。

假设你添加了一个Event叫做addCriteria,系统认为该事件是addcriteria,但调用hasListener('addCriteria')返回false。

这是个bug。

看作者咋说:
Lowercase was the event standard for HTML. e.g.

node.onclick = ... not node.onClick = ...

It's also nice to prevent casing errors. Since it's just a string name, one wrong case can be impossible to detect and/or debug.
__________________
Jack Slocum
Ext JS - Core Development Team
[email protected]


如何修正该bug。
Observable.js
/**
     * Checks to see if this object has any listeners for a specified event
     * @param {String} eventName The name of the event to check for
     * @return {Boolean} True if the event is being listened for, else false
     */
    hasListener : function(eventName){
        //var e = this.events[eventName];
        var e = this.events[eventName.toLowerCase()];//正确代码
        return typeof e == "object" && e.listeners.length > 0;
    },

诸如此类的问题,太多太多。


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