有没有办法处理JavaScript中调用的未定义函数？ [英] Is there a way to handle undefined functions being called in JavaScript?

问题描述

如果我有如下功能：

function catchUndefinedFunctionCall( name, arguments )
{
    alert( name + ' is not defined' );
}

我做一些傻事像

foo( 'bar' );

< foo和参数是包含bar的数组？

when foo isn't defined, is there some way I can have my catch function called, with name being 'foo' and arguments being an array containing 'bar'?

推荐答案

还有Mozilla Javascript 1.5（非标准）

There is in Mozilla Javascript 1.5 anyway (it's nonstandard).

检查出来：

var myObj = {
    foo: function () {
        alert('foo!');
    }
    , __noSuchMethod__: function (id, args) {
        alert('Oh no! '+id+' is not here to take care of your parameter/s ('+args+')');
    } 
}
myObj.foo();
myObj.bar('baz', 'bork'); // => Oh no! bar is not here to take care of your parameter/s (baz,bork)

很酷。请访问 https://developer.mozilla.org/en/Core_JavaScript_1阅读更多信息。 5_Reference / Global_Objects / Object / NoSuchMethod

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