JS transfer function: JS setinterval, settimeout can not pass the function with parameters to solve the solution

In JS, whether settimeout or setinterval, use the function name as the call handle can not take parameters, and in many cases must take parameters, This needs to be solved in a way. First, in the form of a string:--(defect) parameters can not be periodically changed SetInterval ("foo (ID)", 1000); Second, anonymous function packaging (recommended) Window.setinterval (function () { Foo (ID); }, 1000); This allows you to periodically execute the Foo (ID) function and pass the variable ID in; Iii. defining functions that return parameterless functions function foo (ID) { alert (ID); } function _foo (ID) { return function () { Foo (ID); } } Window.setinterval (_foo (ID), 1000); This defines a function _foo, which receives a parameter and returns a function with no parameters, which uses the arguments of the external function inside the function to invoke it without using parameters. In window. In the SetInterval function, the _foo (ID) is used to return a function handle with no parameters, thus enabling the function of parameter passing. Iv. Modification of SetInterval function foo (ID) { alert (ID); } var _sto = setinterval; Window.setinterval = function (Callback,timeout,param) { var args = Array.prototype.slice.call (arguments,2); var _CB = function () { Callback.apply (Null,args); } _sto (_cb,timeout); } Window.setinterval (Hello,3000,username); All of the above methods are also suitable for settimeout.

This article links http://www.cxybl.com/html/wyzz/JavaScript_Ajax/20130712/39060.html