javascript - Call function with setInterval in jQuery?

Question

I'm trying to create a interval call to a function in jQuery, but it doesn't work! My first question is, can I mix common JavaScript with jQuery?

Should I use setInterval("test()",1000); or something like this:

var refreshId = setInterval(function(){
    code...
}, 5000);

Where do I put the function that I call and how do I activate the interval? Is it a difference in how to declare a function in JavaScript compared to jQuery?

Answer 1

To write the best code, you "should" use the latter approach, with a function reference:

var refreshId = setInterval(function() {}, 5000);

or

function test() {}
var refreshId = setInterval(test, 5000);

but your approach of

function test() {}
var refreshId = setInterval("test()", 5000);

is basically valid, too (as long as test() is global).

Note that there is no such thing really as "in jQuery". You're still writing the Javascript language; you're just using some pre-made functions that are the jQuery library.