Once the slider is generated, it appears that there is no built-in method to resize it, causing issues with responsive design.
Is there a way to adjust the size of the Coin Slider plugin based on the media queries in Twitter Bootstrap 3?
Take a look at Coin Slider's demo for a live example.
The current plugin version does not provide a way to resize it, so I took the initiative to create a script that can handle resizing the Coin Slider. You can test this script on Coin Slider's demo site:
var resizeCoinSliderTo = function(coinSlider, toWidth, toHeight) {
var csColumns = 7;
var csRows = 5;
var imgWidth = toWidth;
var imgHeight = toHeight;
var cellWidth = imgWidth/csColumns;
var cellHeight = imgHeight/csRows;
var coinSliderId = coinSlider.attr("id");
coinSlider.css({
'width': imgWidth,
'height': imgHeight
});
$('.cs-'+coinSliderId).css({
'width': (cellWidth + 'px'),
'height': (cellHeight + 'px'),
'background-size': (imgWidth + 'px ' + imgHeight + 'px')
}).each(function() {
var cellOffsets = $(this).attr("id").replace("cs-"+coinSliderId,"");
var hOffSet = cellHeight * (Math.floor(parseInt(cellOffsets[0])-1) % csRows);
var wOffSet = cellWidth * (parseInt(cellOffsets[1])-1);
$(this).css({
"left": (wOffSet + 'px'),
"top": (hOffSet + 'px'),
"background-position": ((-wOffSet) + 'px ' + (-hOffSet) + 'px')
});
});
$('#cs-navigation-'+coinSliderId).children("a").css("top", (((imgHeight/2)-15)+'px'));
};
To ensure proper screen fit without losing the ratio of the image slider, the resizeCoinSliderTo function should be called after each media query breakpoints, as shown below:
<span id="mq-detector">
<span class="visible-xs"></span>
<span class="visible-sm"></span>
<span class="visible-md"></span>
<span class="visible-lg"></span>
</span>
#mq-detector {
visibility: hidden;
}
var coinSlider = $("#coin-slider");
var baseWidthDisplay = undefined;
var baseHeightDisplay = undefined;
var currentRatio = undefined;
var mqRatios = [0.75, 0.95, 0.8, 1];
var mqDetector = $("#mq-detector");
var mqSelectors = [
mqDetector.find(".visible-xs"),
mqDetector.find(".visible-sm"),
mqDetector.find(".visible-md"),
mqDetector.find(".visible-lg")
];
var checkCoinSliderForResize = function() {
for (var i = 0; i <= mqSelectors.length; i++) {
if (mqSelectors[i].is(":visible")) {
if (currentRatio == undefined) {
baseWidthDisplay = parseInt(coinSlider.css("width"));
baseHeightDisplay = parseInt(coinSlider.css("height"));
}
if (i == 0) {
var specialWidth = Math.floor(parseInt($("body").css("width"))*0.75);
if (specialWidth < 300){
specialWidth = 300;
}
var specialHeight = Math.floor(baseHeightDisplay * specialWidth / baseWidthDisplay);
resizeCoinSliderTo(coinSlider, specialWidth, specialHeight);
}
if (currentRatio != mqRatios[i]) {
currentRatio = mqRatios[i];
if (i > 0) {
resizeCoinSliderTo(coinSlider, baseWidthDisplay*currentRatio, baseHeightDisplay*currentRatio);
}
}
break;
}
}
};
$(window).on('resize', checkCoinSliderForResize);
checkCoinSliderForResize();
Remember to place all JavaScript code after the DOM is ready and after the creation of coinslider.
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