我有4个元素,onclick()
只有block
div中的一个会显示;
HTML:
<!--elements that will toggle block div to show-->
<p onclick="expand(this.id)" id="p1"></p>
<p onclick="expand(this.id)" id="p2"></p>
<p onclick="expand(this.id)" id="p3"></p>
<p onclick="expand(this.id)" id="p4"></p>
<!--block div-->
<div id="block_p1"></div>
<div id="block_p2"></div>
<div id="block_p3"></div>
<div id="block_p4"></div>
JS:
function expand(e) {
document.getElementById("block_" + e).style.display = "block";
document.getElementById(e).style.backgroundColor = "#425a94";
}
问题是当我点击第一个元素之后的第二个元素时,我说p2
后点击p1
,块div - block_p1
不会消失当block_p2
显示时,如何在点击第二个块后隐藏第一个块? 如果我没有使用参数我做某事像这样:
function expand() {
document.getElementById("block_p2").style.display = "block";
document.getElementById("p2").style.backgroundColor = "#425a94";
document.getElementById("block_p1").style.display = "none";
}
在具有参数的情况下,我不知道如何做同样的事情。同样在选择第三个元素的情况下,我也需要隐藏前两个块。
答案 0 :(得分:5)
首先需要隐藏以id expanded_
开头的所有div,只需在其余代码之前添加此行。
var allExpanded = document.querySelectorAll( "div[id^='expanded_']" );
Array.from( allExpanded ).forEach( s => (s.style.display = "none") );
您的功能变为
function expand(e)
{
//first hide all
var allExpanded = document.querySelectorAll( "div[id^='expanded_']" );
Array.from( allExpanded ).forEach( s => (s.style.display = "none") );
//then show specific
document.getElementById("expanded_" + e).style.display = "block";
document.getElementById(e).style.backgroundColor = "#425a94";
document.getElementById("toolbar_expand").style.display = "block";
}
答案 1 :(得分:1)
From my previous answer,一个小修正案,用于获取所有可以在函数中循环的显示元素,以删除之前添加的类:
color: #000000;
&#13;
const buttons = document.querySelectorAll('.button');
const slides = document.querySelectorAll('.slide');
buttons.forEach(button => {
button.addEventListener('click', handleClick, false);
});
function handleClick(e) {
const id = e.target.dataset.id;
slides.forEach(slide => slide.classList.remove('show'));
const slide = document.querySelector(`.slide[data-id="${id}"]`);
slide.classList.add('show');
}
&#13;
.slide {
display: none;
}
.show {
display: block;
}
&#13;
答案 2 :(得分:0)
您可以使用id
匹配选择器获取div
id
block_
作为子字符串的所有function expand(id) {
document.getElementById('block_'+id).style.display = "block";
document.getElementById(id).style.backgroundColor = "#425a94";
document.querySelectorAll('[id^="block_"]').forEach(function(elem){
if(elem.id !== 'block_'+id){
elem.style.display = "none";
var pId = elem.id.split('_')[1];
document.getElementById(pId).style.backgroundColor = "#fff";
}
});
}
,然后将所有这些内容隐藏起来,除了点击的字符串。
div{
display: none;
}
<!--elements that will toggle block div to show-->
<p onclick="expand(this.id)" id="p1">p1 click</p>
<p onclick="expand(this.id)" id="p2">p2 click</p>
<p onclick="expand(this.id)" id="p3">p3 click</p>
<p onclick="expand(this.id)" id="p4">p4 click</p>
<!--block div-->
<div id="block_p1">P1</div>
<div id="block_p2">P2</div>
<div id="block_p3">P3</div>
<div id="block_p4">P4</div>
DELETE FROM tablename
WHERE user_id IN (SELECT user_id
FROM tablename
WHERE state = "left")