Develop Reference

Call a function inside jQuery function

I want to execute an exeternal function inside the JQuery method. The problem appear when I try to call the method, the one looks undefined. How could I solve this? I amb using Typescript with Angular 2
ngAfterViewInit() {
jQuery(".mo-table").scroll(function () {
var trueDiveHeight = jQuery(".mo-table")[0].scrollHeight;
var divHeight = jQuery(".mo-table").height();
var scrollLeft = trueDiveHeight - divHeight;
if (jQuery(".mo-table").scrollTop() >= scrollLeft - 150) {
this.onSearch();
console.log("new bottom")
}
});
}
The method onSearch is an external function, and is Undefined.
onSearch(): void {
this.updateTableReport(this.scrollId, this.buildParams())
}
Any help would be appreciated.

Change
jQuery(".mo-table").scroll(function () {
to
jQuery(".mo-table").scroll( ()=> {
your this is not refering to your component
or the old js way:
ngAfterViewInit() {
var self = this; //<-- assign this to self here
jQuery(".mo-table").scroll(function () {
var trueDiveHeight = jQuery(".mo-table")[0].scrollHeight;
var divHeight = jQuery(".mo-table").height();
var scrollLeft = trueDiveHeight - divHeight;
if (jQuery(".mo-table").scrollTop() >= scrollLeft - 150) {
self.onSearch(); //<-- use self here
console.log("new bottom")
}
});
}

Call same function in window ready and window resize

I have 2 different functions to call based on the size of the screen. I call them in ready function like this:
$(document).ready(function() {
var $window = $(window);
var $window_width = $(window).width();
if ($window_width < 768) {
faq_mobile();
} else {
faq();
}
});
But again I want call them on window resize event since the functions are not called then. So I wrote this:
$(window).bind('resize', function(e) {
window.resizeEvt;
$(window).resize(function() {
clearTimeout(window.resizeEvt);
window.resizeEvt = setTimeout(function() {
if ($(window).width() < 768) {
faq_mobile();
} else {
faq();
}
}, 250);
});
});
But this does not work properly since the functions faq and faq_mobile have been called multiple times when I resize the window. What is the best solution for on this case?

function handler() { // separate the code and wrap it in a function
var $window_width = $(window).width();
if ($window_width < 768) {
faq_mobile();
} else {
faq();
}
}
$(handler); // on load of the document
$(window).resize(handler); // on resize of the window
If you want to keep the delay of the resize event, then change the last line above to this:
$(window).resize(function() {
window.clearTimeout(window.resizeEvt); // remove previous delay if any
window.resizeEvt = setTimeout(function() { // create a new delay
handler();
window.resizeEvt = 0;
}, 250);
});

Well.. thanks everyone for help. I googled it a bit and found a fix for it. I had to unbind the events which were added inside faq and faq_mobile functions after a resize is done. Then call those functions again. Here is the modified code: (Thanks #disstruct for your advice).
$(document).ready(function() {
var width = $(window).width();
handleView(width);
});
$(window).bind('resize', function(e) {
window.resizeEvt;
$(window).resize(function() {
clearTimeout(window.resizeEvt);
window.resizeEvt = setTimeout(function() {
// here i am unbinding the click events which were previously added inside faq and faq_mobile functions.
$('.faq-expand, .answer-close').off('click');
var width = $(window).width();
handleView(width);
}, 250);
});
});
function handleView(width) {
if (width < 768) {
faq_mobile();
} else {
faq();
}
}

Your code looks a little strange. Consider this example
var isMobileView = false;
var isDesktopView = false;
function handleView(width) {
if (width < 768 && isDesktopView) {
faq_mobile();
isMobileView = true;
isDesktopView = false;
} else if (width >= 768 && isMobileView) {
faq();
isMobileView = false;
isDesktopView = true;
}
}
$(document).ready(function() {
var width = $(window).width();
handleView(width)
});
$(window).resize(function() {
var width = $(window).width();
handleView(width)
})

jQuery: addClass only once

I have an addClass and removeClass function running on window resize, using an if else statement. The markup is as follows:
$(window).load(function() {
resize();
});
//Every resize of window
$(window).resize(function() {
resize();
});
//Dynamically assign height
function resize() {
// Handler for .ready() called.
var windowWidth = $(window).width(),
windowHeight = $(window).height(),
windowHeight = windowWidth / 1.7777;
var loadwindowHeight = $(window).height(),
loadspriteHeight = $('.spritespin-canvas').height();
if(loadspriteHeight < loadwindowHeight) {
$('.spritespin-canvas').addClass('height');
} else {
$('.spritespin-canvas').removeClass('height');
}
}
The only problem is, when you resize the window, it keeps repeatedly adding and removing the class, it it possible to run the addClass and removeClass functions once? Any suggestions would be greatly appreciated!

You can use .hasClass.
var hasHeightClass = $('.spritespin-canvas').hasClass('height');
if (loadspriteHeight < loadwindowHeight && !hasHeightClass) {
$('.spritespin-canvas').addClass('height');
} else if (hasClass) {
$('.spritespin-canvas').removeClass('height');
}

Unable to call a jQuery function from within .resize()

Here is my code:
function centerAlign(image, parent) {
image.load(function() {
var imageWidth = image.width();
var parentWidth = parent.width();
if(imageWidth != 0) {
var trim = (parentWidth - imageWidth) / 2;
image.css("marginLeft", trim);
}
});
}
$(window).resize(function() {
centerAlign($(".swiper-slide img"), $(".swiper-slide"));
});
$(document).ready(function() {
centerAlign($(".swiper-slide img"), $(".swiper-slide"));
});
It runs the function on page load however not on window resize. Any thoughts?

Found the solution, I was calling load within resize. Guessing as it's already loaded it wont run on resize. Changed to:
function centerAlign(image, parent) {
var imageWidth = image.width();
var parentWidth = parent.width();
if(imageWidth != 0) {
var trim = (parentWidth - imageWidth) / 2;
image.css("marginLeft", trim);
}
}
$(window).resize(function() {
centerAlign($(".swiper-slide img"), $(".swiper-slide"));
});
$(document).ready(function() {
$(".swiper-slide img").load(function() {
centerAlign($(".swiper-slide img"), $(".swiper-slide"));
});
});
Now I'm only calling load within ready() and not within resize(). Hope this helps anyone else.

JavaScript is being triggered before its time, *only on Chrome & IE

I have a gallery of three Grids with images. The grid sizes changes depending on the screen size, and I have achieved that using Media-Query - ie, on desktop the grid's width will be 33% to make three columns view next to each other, and on tablet it will be 50% to make two columns view, and on phone it will be a 100% for each grid making one column view.
The reason I did this is to create a tiled gallery with images of different heights - and if I did it the normal way it will generate White-empty-spaces when floating.
So to fix this problem, and with the help of few members on this website, we have created a JavaScrip function that will MOVE all of the images that are inside Grid3 equally to Grid1 & Grid2 when screen size is tablet, so we get rid of the third grid making a view of fine two columns. Everything is working great!
Now, the problem is - on Chrome & IE - The function is being fired before its time for some reason that I need your help to help me find it! Please try it your self here: [http://90.195.175.51:93/portfolio.html][2]
Slowly on Chrome or IE - (try it on Firefox as well) - try to re-size the window from large to small, you will notice that BEFORE the top header changes to be a responsive Header (which indicate that you are on a small screen) the images have been sent to Grid1 and Grid 2! but a few px before the time. As on the function it says to fire it on <770.
Hope my question is clear enough for you to help me solve this issue which is stopping me from launching my website. Thanks.
Here is the JavaScrip:
//Gallery Grid System//
var testimonial = $(".testimonial, .galleryItem", "#grid3");
(function () {
$(document).ready(GalleryGrid);
$(window).resize(GalleryGrid);
})(jQuery);
function GalleryGrid() {
var grid3 = $('#grid3');
var width = $(window).width();
if (width < 1030 && width > 770) {
var grid1 = $('#grid1');
var grid2 = $('#grid2');
for (var i = 0; i < testimonial.length; i++) {
if (i < testimonial.length / 2) {
grid1.append(testimonial[i]);
} else {
grid2.append(testimonial[i]);
}
}
} else {
grid3.append(testimonial);
}
}
Note: The following is the whole page with all the functions:
$(document).ready(function () {
//Prevent clicking on .active links
$('.active').click(function (a) {
a.preventDefault();
});
//Allow :active on touch screens
document.addEventListener("touchstart", function () {}, true);
//Hide toolbar by default
window.addEventListener('load', function () {
setTimeout(scrollTo, 0, 0, 0);
}, false);
//Scroll-up button
$(window).scroll(function () {
if ($(this).scrollTop() > 100) {
$('.scrollup').fadeIn();
} else {
$('.scrollup').fadeOut();
}
});
$('.scrollup').click(function () {
$("html, body").animate({
scrollTop: 0
}, 600);
return false;
});
//StickyBox
$(function () {
$.fn.scrollBottom = function () {
return $(document).height() - this.scrollTop() - this.height();
};
var $StickyBox = $('.detailsBox');
var $window = $(window);
$window.bind("scroll resize", function () {
var gap = $window.height() - $StickyBox.height() - 10;
var footer = 288 - $window.scrollBottom();
var scrollTop = $window.scrollTop();
$StickyBox.css({
top: 'auto',
bottom: 'auto'
});
if ($window.width() <= 770) {
return;
$StickyBox.css({
top: '0',
bottom: 'auto'
});
}
if (scrollTop < 50) {
$StickyBox.css({
bottom: "auto"
});
} else if (footer > gap - 100) {
$StickyBox.css({
top: "auto",
bottom: footer + "px"
});
} else {
$StickyBox.css({
top: 80,
bottom: "auto"
});
}
});
});
//Change items location depending on the width of the screen//
$(function () { //Load Ready
function myFunction() {
var insert = $(window).width() <= 770 ? 'insertBefore' : 'insertAfter';
$('#home-sectionB img')[insert]($('#home-sectionB div'));
$('#home-sectionD img')[insert]($('#home-sectionD div'));
}
myFunction(); //For When Load
$(window).resize(myFunction); //For When Resize
});
//Contact Form//
$(".input").addClass('notSelected');
$(".input").focus(function () {
$(this).addClass('selected');
});
$(".input").focusout(function () {
$(this).removeClass('selected');
});
$(document).ready(function () {
GalleryGrid();
$(window).resize(GalleryGrid);
});
//Gallery Grid System//
var testimonial = $(".testimonial, .galleryItem", "#grid3");
(function () {
$(document).ready(GalleryGrid);
$(window).resize(GalleryGrid);
})(jQuery);
function GalleryGrid() {
var grid3 = $('#grid3');
var width = $(window).width();
if (width < 1030 && width > 770) {
var grid1 = $('#grid1');
var grid2 = $('#grid2');
for (var i = 0; i < testimonial.length; i++) {
if (i < testimonial.length / 2) {
grid1.append(testimonial[i]);
} else {
grid2.append(testimonial[i]);
}
}
} else {
grid3.append(testimonial);
}
}
//Testimonials Animation//
$(".testimonial").hover(function () {
$(".testimonial").addClass('testimonialNotActive');
$(this).removeClass('testimonialNotActive').addClass('testimonialActive');
},
function () {
$(".testimonial").removeClass('testimonialNotActive');
$(this).removeClass('testimonialActive');
});
//Portfolio Gallery Filter//
(function () {
var $portfolioGallerySection = $('#portfolio-sectionB'),
$filterbuttons = $('#portfolio-sectionA a');
$filterbuttons.on('click', function () {
var filter = $(this).data('filter');
$filterbuttons.removeClass('portfolio-sectionAClicked');
$(this).addClass('portfolio-sectionAClicked');
$portfolioGallerySection.attr('class', filter);
$('.galleryItem').removeClass('selectedFilter');
$('.galleryItem.' + filter).addClass('selectedFilter');
});
}());
});

Your problem is that CSS media queries and jQuery's $(window).width() do not always align.
function getCSSWidth() {
var e = window, a = 'inner';
if (!('innerWidth' in window )) {
a = 'client';
e = document.documentElement || document.body;
}
return e[ a+'Width' ];
}
Use this instead of $(window).width()
modified from http://andylangton.co.uk/articles/javascript/get-viewport-size-javascript/

I think this could solve your problem (but I'm not quite sure)
//Put that before the document ready event
(function($,sr){
// debouncing function from John Hann
// http://unscriptable.com/index.php/2009/03/20/debouncing-javascript-methods/
var debounce = function (func, threshold, execAsap) {
var timeout;
return function debounced () {
var obj = this, args = arguments;
function delayed () {
if (!execAsap)
func.apply(obj, args);
timeout = null;
};
if (timeout)
clearTimeout(timeout);
else if (execAsap)
func.apply(obj, args);
timeout = setTimeout(delayed, threshold || 100);
};
}
// smartresize
jQuery.fn[sr] = function(fn){ return fn ? this.bind('resize', debounce(fn)) : this.trigger(sr); };
})(jQuery,'smartresize');
// Here you call GalleryGrid (replace $(window).resize(GalleryGrid) with that):
$(window).smartresize(GalleryGrid);
http://www.paulirish.com/2009/throttled-smartresize-jquery-event-handler/

The reason is your vertical scrollbar. Your content is fixed at width=1030, but when the window size is 1030, the size of the viewport is actually: window size (1030) - vertical scroll bar
Try setting
<body style="overflow:hidden">
You will see that it works correctly when the scrollbar is removed. Or try setting:
<link href="assets/css/tablets-landscape.css" rel="stylesheet" type="text/css" media="screen and (max-width : 1045px)"/>
Set max-width:1045px to make up for scrollbar, you will see that it works correctly.
Your javascript should be like this:
var width = $(window).width() + verticalscrollbarWidth;