[英]How to add,remove div or span in html using javascript?
我正在建立一個網站,並在網站的其中一個網頁中,我想根據從網站上獲取的數據在網頁中添加或刪除span元素(也可以是div元素)。
這是代碼:
HTML部分:
<html>
<span class="t1"><input type="text" class="t1" id="t1s<?php the_ID(); ?>">
</span> <span id="star1s<?php the_ID(); ?>" class="rating1"></span>
<hr>
<span class="t2"><input type="text" class="t2" id="t2s<?php the_ID(); ?>">
</span> <span id="star2s<?php the_ID(); ?>" class="rating2"></span>
<hr>
<span class="t3"><input type="text" class="t3" id="t3s<?php the_ID(); ?>">
</span> <span id="star3s<?php the_ID(); ?>" class="rating3"></span>
<hr>
<span class="t4"><input type="text" class="t4" id="t4s<?php the_ID(); ?>">
</span> <span id="star4s<?php the_ID(); ?>" class="rating4"></span>
<hr>
</html>
在html部分中,應根據從數據庫中獲取的數據添加或刪除span部分。 以下是我需要添加或刪除的代碼,
<span class="t4"><input type="text" class="t4" id="t4s<?php the_ID(); ?>">
</span> <span id="star4s<?php the_ID(); ?>" class="rating4"></span>
<hr>
JAVASCRIPT PART:
<script>
var getstarid = "<?php the_ID();?>";
function rating1( stars1 ) {
var ratingfill1=stars1;
var rating_integer1=Math.floor(ratingfill1);
var rating_decimal1=ratingfill1%1;
var rating_dec_trimmed1=rating_decimal1.toFixed(1);
if((rating_dec_trimmed1==0.1)||(rating_dec_trimmed1==0.2)||
(rating_dec_trimmed1==0.3)||(rating_dec_trimmed1==0.4))
{document.getElementById("star1s"+getstarid).style.width =
((40*rating_integer1)+18) + 'px';}
if((rating_dec_trimmed1==0.6)||(rating_dec_trimmed1==0.7)||
(rating_dec_trimmed1==0.8)||(rating_dec_trimmed1==0.9))
{document.getElementById("star1s"+getstarid).style.width =
((40*rating_integer1)+28) + 'px';}
if(rating_dec_trimmed1==0.5)
{document.getElementById("star1s"+getstarid).style.width =
((40*rating_integer1)+20) + 'px';}
if(rating_dec_trimmed1==0)
{document.getElementById("star1s"+getstarid).style.width =
(40*rating_integer1) + 'px';}
}
function rating2( stars2 ) {
var ratingfill2=stars2;
var rating_integer2=Math.floor(ratingfill2);
var rating_decimal2=ratingfill2%1;
var rating_dec_trimmed2=rating_decimal2.toFixed(1);
if((rating_dec_trimmed2==0.1)||(rating_dec_trimmed2==0.2)||
(rating_dec_trimmed2==0.3)||(rating_dec_trimmed2==0.4))
{document.getElementById("star2s"+getstarid).style.width =
((40*rating_integer2)+18) + 'px';}
if((rating_dec_trimmed2==0.6)||(rating_dec_trimmed2==0.7)||
(rating_dec_trimmed2==0.8)||(rating_dec_trimmed2==0.9))
{document.getElementById("star2s"+getstarid).style.width =
((40*rating_integer2)+28) + 'px';}
if(rating_dec_trimmed2==0.5)
{document.getElementById("star2s"+getstarid).style.width =
((40*rating_integer2)+20) + 'px';}
if(rating_dec_trimmed2==0)
{document.getElementById("star2s"+getstarid).style.width =
(40*rating_integer2) + 'px';}
}
function rating3( stars3 ) {
var ratingfill3=stars3;
var rating_integer3=Math.floor(ratingfill3);
var rating_decimal3=ratingfill3%1;
var rating_dec_trimmed3=rating_decimal3.toFixed(1);
if((rating_dec_trimmed3==0.1)||(rating_dec_trimmed3==0.2)||
(rating_dec_trimmed3==0.3)||(rating_dec_trimmed3==0.4))
{document.getElementById("star3s"+getstarid).style.width =
((40*rating_integer3)+18) + 'px';}
if((rating_dec_trimmed3==0.6)||(rating_dec_trimmed3==0.7)||
(rating_dec_trimmed3==0.8)||(rating_dec_trimmed3==0.9))
{document.getElementById("star3s"+getstarid).style.width =
((40*rating_integer3)+28) + 'px';}
if(rating_dec_trimmed3==0.5)
{document.getElementById("star3s"+getstarid).style.width =
((40*rating_integer3)+20) + 'px';}
if(rating_dec_trimmed3==0)
{document.getElementById("star3s"+getstarid).style.width =
(40*rating_integer3) + 'px';}
}
function rating4( stars4 ) {
var ratingfill4=stars4;
var rating_integer4=Math.floor(ratingfill4);
var rating_decimal4=ratingfill4%1;
var rating_dec_trimmed4=rating_decimal4.toFixed(1);
if((rating_dec_trimmed4==0.1)||(rating_dec_trimmed4==0.2)||
(rating_dec_trimmed4==0.3)||(rating_dec_trimmed4==0.4))
{document.getElementById("star4s"+getstarid).style.width =
((40*rating_integer4)+18) + 'px';}
if((rating_dec_trimmed4==0.6)||(rating_dec_trimmed4==0.7)||
(rating_dec_trimmed4==0.8)||(rating_dec_trimmed4==0.9))
{document.getElementById("star4s"+getstarid).style.width =
((40*rating_integer4)+28) + 'px';}
if(rating_dec_trimmed4==0.5)
{document.getElementById("star4s"+getstarid).style.width =
((40*rating_integer4)+20) + 'px';}
if(rating_dec_trimmed4==0)
{document.getElementById("star4s"+getstarid).style.width =
(40*rating_integer4) + 'px';}
}
var second=0,third=0,fourth=0;
var getrate1 = "<?php echo $ratingonequery;?>";
var getrate2 = "<?php echo $ratingtwoquery;?>";
var getrate3 = "<?php echo $ratingthreequery;?>";
var getrate4 = "<?php echo $ratingfourquery;?>";
var getratename1 = "<?php echo $ratingnameonequery; ?>";
var getratename2 = "<?php echo $ratingnametwoquery; ?>";
var getratename3 = "<?php echo $ratingnamethreequery; ?>";
var getratename4 = "<?php echo $ratingnamefourquery; ?>";
//below is part of javascript that serves as the logic for adding or
//removing span element
if((getrate1!="")&&(getratename1!=""))
{rating1(getrate1);document.getElementById("t1s"+getstarid).value
=getratename1;}
{
if((getrate2!="")&&(getratename2!="")){second=1;
rating2(getrate2);document.getElementById("t2s"+getstarid).value
=getratename2;
}
else if((getrate3!="")&&(getratename3!="")){third=1;
rating2(getrate3);document.getElementById("t2s"+getstarid).value
=getratename3;
}
else if((getrate4!="")&&(getratename4!="")){fourth=1;
rating2(getrate4);document.getElementById("t2s"+getstarid).value
=getratename4;
}
}
{
if((getrate3!="")&&(getratename3!="")&&(third==0)){third=1;
rating3(getrate3);document.getElementById("t3s"+getstarid).value
=getratename3;
}
else if((getrate4!="")&&(getratename4!="")&&(fourth==0)){fourth=1;
rating3(getrate4);document.getElementById("t3s"+getstarid).value
=getratename4;
}
}
if((getrate4!="")&&(getratename4!="")&&(fourth==0)){fourth=1;
rating4(getrate4);document.getElementById("t4s"+getstarid).value
=getratename4;
}
document.getElementById("t1s"+getstarid).disabled = true;
document.getElementById("t2s"+getstarid).disabled = true;
document.getElementById("t3s"+getstarid).disabled = true;
document.getElementById("t4s"+getstarid).disabled = true;
</script>
CSS PART:
<style>
.rating1,.rating2,.rating3,.rating4 {
font-size: 48px;
color: #0095f9;
display: inline-block;
overflow: hidden;
}
.rating1::before {
content: "\2605\2605\2605\2605\2605"
}
.rating2::before {
content: "\2605\2605\2605\2605\2605"
}
.rating3::before {
content: "\2605\2605\2605\2605\2605"
}
.rating4::before {
content: "\2605\2605\2605\2605\2605"
}
.t1,.t2,.t3,.t4{background-color:#ffffff;
float:left;font-size:20px;
padding: -3px;
border: none;
border-bottom: solid 1px #0095f9;
outline: none;
}
</style>
那么,如何在javascript部分中通過邏輯添加或刪除html部分中的span元素。
提前感謝你。
您應該閱讀w3schools以了解正確的內容和方法:
對於javascript: https : //www.w3schools.com/jsref/met_node_appendchild.asp
對於jquery: https : //www.w3schools.com/jquery/html_append.asp
您也可以在這些頁面中找到removechild和remove()。
您還可以閱讀MDN文檔以更全面地了解該主題。
$(document).ready(function(){ $("#del").on('click',function(){ $("#delete").remove(); }) $("#add").on('click',function(){ $("#hello").append("<br><span id='added'>I got added</span><br>"); }) })
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <div> <span id='hello'>Hello</span><br> <span id='delete'> I will get deleted</span><br> <input type="button" id='del' value='Delete span'><br> <input type="button" id="add" value='Add span'> </div>
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