[英]Let Visual Studio 2010 JavaScript IntelliSense know the type of object
Let's say I have the javascript function below: 假设我有以下javascript函数:
function (msg) {
var divForResult = document.getElementById("test");
if (typeof (msg) == "object")
{
divForResult.innerHTML = "Result: <b>" + msg.Message + "</b>";
}
else {
divForResult.innerHTML = "Result: <b>" + msg + "</b>";
}
}
I know that if the msg
variable is an object, it's as Exception, so I print the Message property. 我知道如果
msg
变量是一个对象,它就像Exception一样,所以我打印了Message属性。 If not, the msg
is a string, and I print the variable itself. 如果没有,则
msg
是一个字符串,我自己打印变量。 My question is how do I let Visual Studio 2010 JavaScript IntelliSense "know" the type of object msg is, so that I'll get the correct properties/functions for the object type in a situation such as this? 我的问题是如何让Visual Studio 2010 JavaScript IntelliSense“知道”msg对象的类型,以便在这种情况下我能获得对象类型的正确属性/函数?
Actually it's not limited to local variables. 实际上它并不局限于局部变量。 You can help VS by using xml comments like this:
您可以使用xml注释来帮助VS,如下所示:
function foo(message) {
/// <param name="message" type="String"></param>
message. //ctr+space here
}
It is not exactly what you are asking for, but it works great when you are accepting argument of one type only. 它并不完全是你所要求的,但是当你只接受一种类型的论证时它会很有效。
Unfortunately, Visual Studio's " pseudo-execution " of JavaScript in order to provide better Intellisense support is still not comprehensive enough. 不幸的是,Visual Studio的“ 伪执行 ”JavaScript为了提供更好的Intellisense支持仍然不够全面。
For example, I wrote this little function: 例如,我写了这个小函数:
var foo = function(obj) {
if (typeof obj === "string") {
// presumably Intellisense should know obj is a string
// in this compound statement but it doesn't.
// try "obj." here
}
if ((typeof obj === "object") && (obj.constructor === Date)) {
// presumably Intellisense should know obj is a Date
// in this compound statement but it doesn't.
// try "obj." here
}
};
And if you try it out VS2010 doesn't notice that in the two clauses I've tried to limit the type of the passed-in object and that therefore it could provide better suggestions. 如果你试一试VS2010并没有注意到在这两个条款中我试图限制传入对象的类型,因此它可以提供更好的建议。 So, it seems that Intellisense is pretty limited to local variables.
因此,似乎Intellisense非常局限于局部变量。
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