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Jquery function only loads after page refresh

I have roughly around 50 video thumbnails on a set page.
I would like to resize them depending on the resolution.
What I have tried was using #media query in css that did not work as expected then I moved over to this.
$(document).ready(function(event) {
var width = $(window).width();
// Change thumbnail size if browser width changes (should be in real-time)
if (width <= 1300) {
console.log(width);
$('.mdl-cell').removeClass('mdl-cell--3-col').addClass('mdl-cell--4-col');
} else {
$('.mdl-cell').removeClass('mdl-cell--4-col').addClass('mdl-cell--3-col');
}
});
After inserting that script the video thumbnail size changes but as I adjust the browser the jQuery does not load and resize the thumbnail unless the page is refreshed ?
Im not sure as to why the jQuery is not loading the script in real time as the size (browser) changes.
Languages that I am using in this project : PHP, jQuery

you need to catch window resize event with jQuery and also write your code there.
$(window).resize(function() {
var width = $(window).width();
// Change thumbnail size if browser width changes (should be in real-time)
if (width <= 1300) {
console.log(width);
$('.mdl-cell').removeClass('mdl-cell--3-col').addClass('mdl-cell--4-col');
} else {
$('.mdl-cell').removeClass('mdl-cell--4-col').addClass('mdl-cell--3-col');
}
});
To reduce code repetition you can make a function and call it in both $(window).resize() and $(document).ready()

function onResize() {
var width = $(window).width();
if (width <= 1300) {
$('.mdl-cell').removeClass('mdl-cell--3-col').addClass('mdl-cell--4-col');
} else {
$('.mdl-cell').removeClass('mdl-cell--4-col').addClass('mdl-cell--3-col');
}
}
$(document).ready(onResize);
$(window).resize(onResize);
This should work, but it would be much better if it were done with css. Would love you help you with that if you want to post what you tried. If you do it with css, you will not have the jumping on the page that'll occur when the js loads and changes those classes in and out.

You can do smth like this.
Note: this is untested code
function updateSizes(){
var width = $(window).width();
if (width <= 1300) {
$('.mdl-cell').removeClass('mdl-cell--3-col').addClass('mdl-cell--4-col');
} else {
$('.mdl-cell').removeClass('mdl-cell--4-col').addClass('mdl-cell--3-col');
}
}
$(document).ready(function(event) {
updateSizes();
// do other stuff here
});
$( window ).resize(function() {
updateSizes();
// do other stuff here
});

trying to get window width with javascript

Trying to calculate window width but it is not working. My code:
var windowWidth = '';
function getWidth() {
windowWidth = $(window).width() / parseFloat($("body").css("font-size"));
}
I want to use windowWidth but it will not let me. WHy?

As commented, you can just use window.innerWidth, but for your specific case it should work just fine with what you have, you just need to call the function you've written:
window.addEventListener("load", getWidth);
window.addEventListener("resize", getWidth);

Get, set and reset height using browser size and resize

I'm still an amateur when it comes to JS, I would like to get the height of the browser window, and then get it to update on resize. Is this possible? (code below)
$(document).ready(function() {
var winHeight = $(window).height(),
winWidth = $(window).width();
$('#wrap_project_horizontal_gallery').css({
'height' : winHeight - 170
});
});
I've thought about using setInterval but there must be a better way. Thanks very much for the help
EDIT: This needs to happen without a page refresh

You could bind a method to the resize event in the window and recalculate your variables there, or resize the elements that need resizing.
$(document).ready(function(){
$(window).resize(function() {
// your code here
});
});
or using a handler
$(document).ready(function(){
$(window).resize(handle_window_resize);
});
function handle_window_resize() {
// your code here
}

You can use the jQuery .resize() method.
$(window).resize(function() {
var winHeight = $(window).height(),
winWidth = $(window).width();
$('#wrap_project_horizontal_gallery').css({
'height' : winHeight - 170
});
});

Get browser width and height after user resizes the window

Is there any way to get the browser width and height after a user has resized the window. For example if the window is 1920 by 1080 and the user changes the window to 500 by 500 is there any way to get those two new values in JavaScript or jquery?

Pure Javascript answer:
var onresize = function() {
//your code here
//this is just an example
width = document.body.clientWidth;
height = document.body.clientHeight;
}
window.addEventListener("resize", onresize);
This works fine on chrome. However, it works only on chrome. A slightly more cross-browser example is using the event target properties "outerWidth" and "outerHeight", since in this case the event "target" is the window itself. The code would be like this
var onresize = function(e) {
//note i need to pass the event as an argument to the function
width = e.target.outerWidth;
height = e.target.outerHeight;
}
window.addEventListener("resize", onresize);
This works fine in firefox and chrome
Hope it helps :)
Edit: Tested in ie9 and this worked too :)

If you need to know these values to do layout adjustments, I bet you plan on listening to those values. I recommended using the Window.matchmedia() API for that purpose instead.
It is much more performant and is basically the JS equivalent of CSS media queries.
Very quick example of use:
if (window.matchMedia("(max-width: 500px)").matches) {
/* the viewport is less than or exactly 500 pixels wide */
} else {
/* the viewport is more than 500 pixels wide */
}
You can also setup a listener that'll get called every time the state of the matches property changes.
See MDN for description and example of using a listener.

It's possible by listening to resize event.
$(window).resize(function() {
var width = $(window).width();
var height = $(window).height();
})

You can use the JQuery resize() function. Also make sure you add the same resize logic to reload event. If user reloads in the sized window your logic won't work.
$(window).resize(function() {
$windowWidth = $(window).width();
$windowHeight = $(window).height();
});
$(document).ready(function() {
//same logic that you use in the resize...
});

Practically, I use this and it helps me a lot:
var TO = false;
var resizeEvent = 'onorientationchange' in window ? 'orientationchange' : 'resize';
$(window).bind(resizeEvent, function() {
TO && clearTimeout(TO);
TO = setTimeout(resizeBody, 200);
});
function resizeBody(){
var height = window.innerHeight || $(window).height();
var width = window.innerWidth || $(window).width();
alert(height);
alert(width);
}

You can use the resize event, along with the height() and width() properties
$(window).resize(function(){
var height = $(window).height();
var width = $(window).width();
});
See some more examples here

Use jQuery resize method to listen window size change . inside callback you can get height and width.
$(window).resize(function(){
var width = $(window).width();
var height = $(window).height();
});

Simplest way to get real width and height of an element after window resize as the follow:
<div id="myContainer">
<!--Some Tages ... -->
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script>
$(function () {
$(window).resize(function () {
//The below two lines of codes more Important to clear the previous settings to get the current measure of width and height
$('#myContainer').css('height', 'unset');
$('#myContainer').css('width', 'unset');
var element = $('#myContainer');
var height = element.height();
var width = element.width();
//Below two lines will includes padding but not border
var innerHeight = element.innerHeight();
var innerWidth = element.innerWidth();
//Below two lines will includes padding, border but no margin
var outerHeight = element.outerHeight();
var outerWidth = element.outerWidth();
//Below two lines will includes padding, border and margin
var outerHeight = element.outerHeight(true);
var outerWidth = element.outerWidth(true);
});
});
</script>

You can use the event object to get the height and width, I use destructuring assignment and the target points to window:
const handleGetDim = ({ target }) => ({
width: target.innerWidth,
height: target.innerHeight,
});
window.addEventListener('resize', handleGetDim);

Use JQuery to resize container based on window size

I am trying to have a container div resize based on the dimensions of the window. The height to width ratio is the most important aspect here and I want to maximize the size of the container in whichever direction (height or width) that is most constraining given the ratio. I have tried a few things unsuccessfully with this being the most recent:
$(window).load(function() {
var h = $(window).height();
var w = $(window).width();
If((h/w)>0.61){
$('#container').css({'height': h, 'width':h*1.64}); }
else{ $('#container').css({'height': w/1.64, 'width':w}); }
})
What do I need to change to get the window to resize? Is there a better way to approach this?
Thanks in advance for any assistance. I am not at all familiar with javascript/JQuery and have been unable to find any useful info... this thing is driving me nuts...

You want to capture the resize event, so assuming your current code works to your likings
$(document).ready(function() {
$(window).resize(function() {
var h = $(window).height();
var w = $(window).width();
if((h/w)>0.61) {
$('#container').css({'height': h, 'width':h*1.64});
}
else {
$('#container').css({'height': w/1.64, 'width':w});
}
});
});
And let's avoid the capital I on the if

I typically use this:
function resize () {
var w = $(window);
var containerWrap = $('#container-wrap');
containerWrap.css({ width:w.width(), height:w.height()});
}
I'm not sure if that answers your ratio question.
EDIT:
This may be more helpful:
$(document).ready(function () {
var missionWrap = $('#mission-wrap');
var w = $(window);
w.on('load resize',function() {
missionWrap.css({ width:w.width(), height:w.height()});
});
});