JavaScript: when I pass array from iframe function the array lose his type!
I have an iframe in a form. The iframe contains some info that I want deliver to the form parent by instance of Array. The problem: the Array instance loses it's type and becomes an object! The iframe function:
function getIDS2() { return new Array(); }
The parent call code:
alert(top.frames["sup_search"].getIDS2() instanceof Array);
Of course the answer for the alert is false... So, I can fix it by doing this:
var arr = [];
for(var i =0; i < SuppliersIDs.length; i+=1) {
arr.push(SuppliersIDs[i]);
}
Where SuppliersIDs is the delivered array and arr is the new true type array. But why is this not working as I want it to? By the way, is there any there a way to access the iframe func with jQuery??
Thanks for help.
Because each page has a global context with its own "Array" function, if code on one page passes an array to a function on a separate page, the test "array instanceof Array" will fail. For Array you can do this instead:
var arr = top.frames["sup_search"].getIDS2();
var isArray = arr && Object.prototype.toString.call(arr)=="[object Array]";
It feels hacky but it works.
@darin thanks for the answer. You definitely found the problem Actualy I want do some casting. I need to get it as an Array like the source. I wrote the code like this:
var arr = new Array(SuppliersIDs);
The result is an array of objects not an array of integers as the original.
我找到了使用jquery访问iframe函数的方法
$(this).contents()[0].defaultView.yourFunc()
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