Javascript 单击事件侦听器多次激发
我有一个嵌套的Javascript 单击事件侦听器多次激发,javascript,Javascript,我有一个嵌套的标签,显示喜欢或不喜欢的心。问题是,每次一篇文章被喜欢时,它都会发送大约16个请求(事件触发16次)。我试过使用sleep,和seTimeout,但都没有用。我需要动态地将事件侦听器添加到标记中 首字母\u html {% if user in post.get_likers%} <p class="my-0 text-muted"><i style="color: red;" class="fas
标签,显示喜欢或不喜欢的心。问题是,每次一篇文章被喜欢时,它都会发送大约16个请求(事件触发16次)。我试过使用sleep
,和seTimeout
,但都没有用。我需要动态地将事件侦听器添加到
标记中
首字母\u html
{% if user in post.get_likers%}
<p class="my-0 text-muted"><i style="color: red;" class="fas fa-heart hover"></i> {{post.total_likes}}</p>
{% else %}
<p class="my-0 text-muted"><i class="far fa-heart hover"></i> {{post.total_likes}}</p>
{% endif %}
{%if用户在post.get_likers%}
{{post.total_likes}
{%else%}
{{post.total_likes}
{%endif%}
尝试按视图更新喜欢的内容
document.addEventListener("DOMContentLoaded", () => {
load_clickable();
});
function load_clickable() {
document.querySelectorAll("i").forEach((item) => {
item.addEventListener("click", () => {
update_likes(item);
});
});
}
function update_likes(item) {
const p_tag = item.parentNode;
const post_id = p_tag.parentNode.id;
console.log(post_id, p_tag.innerText);
const fetch_url = `/like/${post_id}`;
fetch(fetch_url, {
method: "POST",
})
.then((response) => response.json())
.then((result) => {
if (result.like) {
console.log("Has Liked");
var new_likes = parseInt(p_tag.innerText) + 1;
p_tag.innerHTML = `<i style="color: red;" class="fas fa-heart hover"></i> ${new_likes}`;
} else if (result.unlike) {
console.log("Has unliked");
var new_likes = parseInt(p_tag.innerText) - 1;
p_tag.innerHTML = `<i class="far fa-heart hover"></i> ${new_likes}`;
}
load_clickable();
});
}
document.addEventListener(“DOMContentLoaded”,()=>{
加载_clickable();
});
函数加载\可点击(){
document.querySelectorAll(“i”).forEach((项目)=>{
item.addEventListener(“单击”,()=>{
更新(项目);
});
});
}
功能更新(项目){
const p_tag=item.parentNode;
const post_id=p_tag.parentNode.id;
log(post_id,p_tag.innerText);
常量fetch_url=`/like/${post_id}`;
fetch(fetch_url{
方法:“张贴”,
})
.then((response)=>response.json())
。然后((结果)=>{
if(result.like){
log(“Has like”);
var new_likes=parseInt(p_tag.innerText)+1;
p_tag.innerHTML=`${new_likes}`;
}else if(结果不一样){
console.log(“已取消链接”);
var new_likes=parseInt(p_tag.innerText)-1;
p_tag.innerHTML=`${new_likes}`;
}
加载_clickable();
});
}
如何使每个事件触发一次?问题是,在更新like之后,您正在调用
load\u clickable
,这将再次向所有
元素添加事件侦听器。相反,您应该在
中显示喜欢的数量,并每次更新文本内容
,这样您就不需要再次附加所有事件侦听器
更新的HTML:
{% if user in post.get_likers%}
<p class="my-0 text-muted"><i style="color: red;" class="fas fa-heart hover"></i> <span>{{post.total_likes}}</span></p>
{% else %}
<p class="my-0 text-muted"><i class="far fa-heart hover"></i> <span>{{post.total_likes}}</span></p>
{% endif %}
调用load_clickable方法是个问题,click事件在技术上仍然处于活动状态,为什么不将
onclick
attr加载到新的i标记,就像这样
.then((result) => {
if (result.like) {
console.log("Has Liked");
var new_likes = parseInt(p_tag.innerText) + 1;
p_tag.innerHTML = `<i style="color: red;" class="fas fa-heart hover" onclick=update_likes(this)></i> ${new_likes}`;
} else if (result.unlike) {
console.log("Has unliked");
var new_likes = parseInt(p_tag.innerText) - 1;
p_tag.innerHTML = `<i class="far fa-heart hover" onclick=update_likes(this)></i> ${new_likes}`;
}
});
。然后((结果)=>{
if(result.like){
log(“Has like”);
var new_likes=parseInt(p_tag.innerText)+1;
p_tag.innerHTML=`${new_likes}`;
}else if(结果不一样){
console.log(“已取消链接”);
var new_likes=parseInt(p_tag.innerText)-1;
p_tag.innerHTML=`${new_likes}`;
}
});
最佳解决方案
{% if user in post.get_likers%}
<p class="my-0 text-muted"><i style="color: red;" class="fas fa-heart hover onclick=update_likes()"></i> <span>{{post.total_likes}}</span></p>
{% else %}
<p class="my-0 text-muted"><i class="far fa-heart hover onclick=update_likes()"></i> <span>{{post.total_likes}}</span></p>
{% endif %}
{%if用户在post.get_likers%}
{{post.total_likes}
{%else%}
{{post.total_likes}
{%endif%}
然后是javascript
document.addEventListener(“DOMContentLoaded”,()=>{
//使用加载的DOM执行其他操作
});
函数更新_likes(){
const p_tag=this.parentNode;
const post_id=p_tag.parentNode.id;
log(post_id,p_tag.innerText);
常量fetch_url=`/like/${post_id}`;
fetch(fetch_url{
方法:“张贴”,
})
.then((response)=>response.json())
。然后((结果)=>{
if(result.like){
log(“Has like”);
var new_likes=parseInt(p_tag.innerText)+1;
p_tag.innerHTML=`${new_likes}`;
}else if(结果不一样){
console.log(“已取消链接”);
var new_likes=parseInt(p_tag.innerText)-1;
p_tag.innerHTML=`${new_likes}`;
}
});
}
这样,所有标记都已使用它们的标记呈现如果我添加一个
,类似的标记也将变为红色,并且文本的样式也不同too@Jjkivai为什么会是红色的?你有针对
儿童的CSS吗?我做错了,我在
中添加了
,这很有效
{% if user in post.get_likers%}
<p class="my-0 text-muted"><i style="color: red;" class="fas fa-heart hover onclick=update_likes()"></i> <span>{{post.total_likes}}</span></p>
{% else %}
<p class="my-0 text-muted"><i class="far fa-heart hover onclick=update_likes()"></i> <span>{{post.total_likes}}</span></p>
{% endif %}
document.addEventListener("DOMContentLoaded", () => {
//do something else with loaded DOM
});
function update_likes() {
const p_tag = this.parentNode;
const post_id = p_tag.parentNode.id;
console.log(post_id, p_tag.innerText);
const fetch_url = `/like/${post_id}`;
fetch(fetch_url, {
method: "POST",
})
.then((response) => response.json())
.then((result) => {
if (result.like) {
console.log("Has Liked");
var new_likes = parseInt(p_tag.innerText) + 1;
p_tag.innerHTML = `<i style="color: red;" class="fas fa-heart hover" onclick=update_likes(this)></i> ${new_likes}`;
} else if (result.unlike) {
console.log("Has unliked");
var new_likes = parseInt(p_tag.innerText) - 1;
p_tag.innerHTML = `<i class="far fa-heart hover" onclick=update_likes(this)></i> ${new_likes}`;
}
});
}