[英]How get the original size images (height and width) from your href and put them on your attr. using jquery
你好朋友我正在尝试从 hrf 获取图像的大小(高度和宽度)并将这些值放入其属性中
这真让我抓狂
这是我的 html:
<figure>
<a href="image-large-1.jpg">
<img src="image-small-1.jpg"/>
</a>
</figure>
<figure>
<a href="image-large-2.jpg">
<img src="image-small-2.jpg"/>
</a>
</figure>
<figure>
<a href="image-large-3.jpg">
<img src="image-small-3.jpg"/>
</a>
</figure>
这就是我要的:
<figure>
<a href="image-large-1.jpg" original-size="1000x800"> //the sizes are example
<img src="image-small-1.jpg"/>
</a>
</figure>
<figure>
<a href="image-large-2.jpg" original-size="1200x700"> //the sizes are example
<img src="image-small-2.jpg"/>
</a>
</figure>
<figure>
<a href="image-large-3.jpg" original-size="900x980"> //the sizes are example
<img src="image-small-3.jpg"/>
</a>
</figure>
我想从“a hrf”中获取“原始大小”属性
我正在尝试使用在这里找到的代码,我从 href (在 console.log 中)获得了图像的原始大小,但我无法在 html 中打印它们
请帮帮我
$(".containerGallery figure a").each(function() {
var imgSrc, imgW, imgH;
function myFunction(image){
var img = new Image();
img.src = image;
img.onload = function() {
return {
src:image,
width:this.width,
height:this.height};
}
return img;
}
var x = myFunction($(this).attr('href'));
x.addEventListener('load',function(){
imgSrc = x.src;
imgW = x.width;
imgH = x.height;
});
$(this).each(function() {
x.addEventListener('load',function(){
console.log(imgW+'x'+imgH);
$(this).attr('original-size', imgW+'x'+imgH);
});
});
});
这是绝对可以满足您的需求的脚本!
const getOriginalSize = (target, url) => { const image = document.createElement("img"); image.src = url; image.onload = function(){ target.setAttribute("original-size", `${image.naturalWidth}x${image.naturalHeight}`); } return image; }
<figure> <a href="https://images.sftcdn.net/images/t_app-cover-l,f_auto/p/befbcde0-9b36-11e6-95b9-00163ed833e7/260663710/the-test-fun-for-friends-screenshot.jpg"> <img src="https://images.sftcdn.net/images/t_app-cover-l,f_auto/p/befbcde0-9b36-11e6-95b9-00163ed833e7/260663710/the-test-fun-for-friends-screenshot.jpg"/> </a> </figure> <figure> <a href="https://www.velior.ru/wp-content/uploads/2009/05/Test-Computer-Key-by-Stuart-Miles.jpg"> <img src="https://www.velior.ru/wp-content/uploads/2009/05/Test-Computer-Key-by-Stuart-Miles.jpg"/> </a> </figure> <script> document.addEventListener('DOMContentLoaded', () => { document.querySelectorAll("figure").forEach( (figure) => { figure.querySelectorAll("a[href]").forEach( function(targetAhref) { getOriginalSize(targetAhref, targetAhref.href); console.warn("image loaded and size registred;"); } ); } ); } ); </script>
问题中的 JavaScript 代码过于复杂和冗余。
这里有一些完成同样事情的简化代码。
// get all <a> elements inside <figure> elements const atags = Array.from(document.querySelectorAll('figure a')); // iterate over every <a> tag atags.forEach(atag => { // create blank image element var img = new Image(); // when the image loads, store its dimensions to the atag's // `data-original-size` attribute img.addEventListener('load', () => { let imgW = img.width, imgH = img.height; atag.dataset.originalSize = `${imgW}x${imgH}`; console.log('atag:', atag); }); // load image from atag's href img.src = atag.href; });
<figure> <a href="https://i.picsum.photos/id/1077/200/300.jpg"> <img src="https://via.placeholder.com/40" /> </a> </figure> <figure> <a href="https://i.picsum.photos/id/913/200/200.jpg"> <img src="https://via.placeholder.com/50" /> </a> </figure> <figure> <a href="https://i.picsum.photos/id/1058/100/100.jpg"> <img src="https://via.placeholder.com/60" /> </a> </figure>
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