我在隐藏空白链接方面有问题。请有人帮我。:
<a href="/sunsetplanlama/<?php echo $sonuc['proje_ismi'] ?>/kumas_1.png" data-lightbox="kumas" data-title="<?php echo $sonuc['proje_ismi'] ?>" class="tab active" >
K1
</a>
如果"href="/sunsetplanlama/<?php echo $sonuc['proje_ismi'] ?>/kumas_1.png"
不会比我想要的"K1"
隐藏字母..
我该怎么做?
需要考虑的几点:
span
元素)而定,如果检索资源失败,则可能导致渲染的材料短暂显示,而在根本不打算显示的情况下再次消失。因此,更好的策略是默认情况下将其隐藏,并在确定资源可用性后立即将其呈现。function ready () {
let anl_toTest = Array.from ( document.querySelectorAll ( '.fa-sign-x' ) )
;
anl_toTest.forEach ( (e_span) => {
let myRequest = new Request ( e_span.parentNode.href)
;
// Fetch API. See [this MDN section](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) for details and code samples
fetch(myRequest)
.then (
function(response) {
if (response.ok) { // Resource was successfully retrieved, show the link
e_span.style.display = "inline";
}
}
, function (e) {
console.log(`Failed on '${myRequest.url}': ${e.message}.`);
}
);
});
} // ready
window.addEventListener ( 'load', ready );
.fa-sign-x {
display: none;
}
<a href="https://www.gravatar.com/avatar/00000000000000000000000000000000?d=identicon&f=y" data-lightbox="kumas" data-title="Pattern" class="tab active" >
<span class="fa-sign-x" >Pattern</span>
</a>
<a href="https://www.example.com/whatever.jpg" data-lightbox="kumas" data-title="Failed" class="tab active" >
<span class="fa-sign-x" >Failed</span>
</a>
<a href="https://secure.gravatar.com/avatar/1a0ea6b0656f0af322419bd6a607598f?s=100&d=retro&r=g" data-lightbox="kumas" data-title="Polar Bear" class="tab active" >
<span class="fa-sign-x" >Polar Bear</span>
</a>
您可以使用file_exists()功能检查文件是否存在。
if(file_exists("/sunsetplanlama/".$sonuc['proje_ismi']."/kumas_1.png")){
echo '<a href="/sunsetplanlama/'.$sonuc['proje_ismi'].'/kumas_1.png" data-lightbox="kumas" data-title="'.$sonuc['proje_ismi'].'" class="tab active" >K1</a>';
}