Best way to store a key=>value array in JavaScript?

That’s just what a JavaScript object is: You can loop through it using for..in loop: See also: Working with objects (MDN). In ECMAScript6 there is also Map (see the browser compatibility table there): An Object has a prototype, so there are default keys in the map. This could be bypassed by using map = Object.create(null) since ES5, but was seldomly done. … Read more

What are the difference between $(document).bind(‘ready’, function) and $(document).ready(function() {})

The difference is, as the docs say There is also $(document).on( “ready”, handler ), deprecated as of jQuery 1.8. This behaves similarly to the ready method but if the ready event has already fired and you try to .on( “ready” ) the bound handler will not be executed. Ready handlers bound this way are executed after any bound by the … Read more

ajax jquery simple get request

It seems to me, this is a cross-domain issue since you’re not allowed to make a request to a different domain. You have to find solutions to this problem: – Use a proxy script, running on your server that will forward your request and will handle the response sending it to the browser Or – … Read more

Jquery change background color

The .css() function doesn’t queue behind running animations, it’s instantaneous. To match the behaviour that you’re after, you’d need to do the following: The .queue() function waits for running animations to run out and then fires whatever’s in the supplied function.

Check if element exists in jQuery

$(‘elemId’).length doesn’t work for me. You need to put # before element id: With vanilla JavaScript, you don’t need the hash (#) e.g. document.getElementById(‘id_here’) , however when using jQuery, you do need to put hash to target elements based on id just like CSS.