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?
This question is related to
javascript
jquery
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.
setInterval(function() {
updatechat();
}, 2000);
function updatechat() {
alert('hello world');
}
First of all: Yes you can mix jQuery with common JS :)
Best way to build up an intervall call of a function is to use setTimeout methode:
For example, if you have a function called test() and want to repeat it all 5 seconds, you could build it up like this:
function test(){
console.log('test called');
setTimeout(test, 5000);
}
Finally you have to trigger the function once:
$(document).ready(function(){
test();
});
This document ready function is called automatically, after all html is loaded.
I have written a custom code for setInterval function which can also help
let interval;
function startInterval(){
interval = setInterval(appendDateToBody, 1000);
console.log(interval);
}
function appendDateToBody() {
document.body.appendChild(
document.createTextNode(new Date() + " "));
}
function stopInterval() {
clearInterval(interval);
console.log(interval);
}<!DOCTYPE html>
<html>
<head>
<title>setInterval</title>
</head>
<body>
<input type="button" value="Stop" onclick="stopInterval();" />
<input type="button" value="Start" onclick="startInterval();" />
</body>
</html>jQuery is just a set of helpers/libraries written in Javascript. You can still use all Javascript features, so you can call whatever functions, also from inside jQuery callbacks. So both possibilities should be okay.
Source: Stackoverflow.com