- Tech
- [Original] Dynamically obtain the length, width, and display ratio of zooming images in web pages with JavaScript
Dynamic Get the length, width, and display ratio of zoom picture </ title> <meta name = " "Content =" editplus "> <meta name =" author "content =" purplendure "> <script language =" javascript "> <! - // Zoom Object. Call: Zoomobj (this) Function ZoomObj (o) {Var zoom = parseint (o.style.zoom, 10) || 100; zoom = Event.wheeldelta / 12; if (zoom> 0) {o.style.zoom = zoom '%';} Return False;</p>
<p>VariGinalWidth, IORIGINALHEIGHT; / / Store the original length, width</p>
<p>// Dynamically display the length, width, and display ratio of the image Function Dispcurrentsize () {var zoom = Document.all.idimg.style.zoom; zoom = evAl (zoom.substring (0, zoom.length-1)); var hidth = ZOOM * Document.all.idimg.width; var hEight = zoom * Document.all.Idimg.Height; Document.all.idpiccurrentsize.innerhtml = "Picture of the current size:" Math.ceil (iWidth / 100) " High: " Math.ceil (Iheight / 100) " Show Proportion: " Math.ceil ((iWidth / IoriginalWidth) "% ";}</p>
<p>// display the image of the original length, width function dispOriginalSize (oImg) {iOriginalWidth = oImg.width; iOriginalHeight = oImg.height; document.all.idPicOriginalSize.innerHTML = "Image length Original Size:" iOriginalWidth "High:" iOriginalHeight ; Document.all.idimg.style.zoom = "100%"; Dispcurrentsize ();} // -> </ script> </ head></p></div><div class="text-center mt-3 text-grey">
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return false;
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function resize_image() {
var jmessagelist = $('div.message');
var first_width = jmessagelist.width();
jmessagelist.each(function() {
var jdiv = $(this);
var maxwidth = jdiv.attr('isfirst') ? first_width : jdiv.width();
var jmessage_width = Math.min(jdiv.width(), maxwidth);
jdiv.find('img, embed, iframe, video').each(function() {
var jimg = $(this);
var img_width = this.org_width;
var img_height = this.org_height;
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});
} else {
jimg.width(jmessage_width);
var height = (img_height / img_width) * jimg.width();
jimg.height(height);
}
}
});
});
}
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$('div.message').each(function() {
var jdiv = $(this);
jdiv.find('table').addClass('table').wrap('<div class="table-responsive"></div>');
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}
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resize_image();
resize_table();
$(window).on('resize', resize_image);
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$('#nav li[data-active="fid-1"]').addClass('active');
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