Javascript 如何向动态填充的div添加onClick函数?
我有带下拉菜单的引导导航栏:Javascript 如何向动态填充的div添加onClick函数?,javascript,api,Javascript,Api,我有带下拉菜单的引导导航栏: <ul class="navbar-nav mr-auto"> <li class="nav-item dropdown"> <a class="nav-link dropdown-toggle" data-toggle="dropdown" href="#" role="button" aria haspopup="true" aria-expanded="false">GANRES</a> <
<ul class="navbar-nav mr-auto">
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" data-toggle="dropdown" href="#" role="button" aria haspopup="true" aria-expanded="false">GANRES</a>
<div class="dropdown-menu"></div>
</li>
</ul>
-
我有一个函数,它用TMDb API填充它们的类型:
async function getGenres() {
let url = "https://api.themoviedb.org/3/genre/movie/list?api_key=d80a54a0422d5fff6149c48741c8bece&language=en-US";
let response = await fetch(url);
let genres = await response.json();
let navbar = document.getElementsByClassName("nav-item dropdown");
navbar.innerHTML += `<div class="dropdown-menu">`;
let nav = document.getElementsByClassName("dropdown-menu");
for (let i = 0; i < genres.genres.length; i++) {
nav[0].innerHTML += `<a class="dropdown-item" href="#">` + genres.genres[i].name + `</a>`;
}
//This part should add separately to each element, but it does not work
//Here is error: Cannot set property 'click' of undefined at getGenres
for (let i = 0; i < genres.genres.length; i++) {
document.getElementsByClassName("dropdown-menu")[i].click = function () {
getmovies("discover/movie?api_key=d80a54a0422d5fff6149c48741c8bece&language=en-us&sort_by=popularity.desc&include_adult=false&include_video=false&page=1&with_genres=" + genres.genres[i].id);
};
};
}
异步函数getGenres(){
让url=”https://api.themoviedb.org/3/genre/movie/list?api_key=d80a54a0422d5fff6149c48741c8bece&language=en-美国”;
let response=等待获取(url);
让genres=wait response.json();
让navbar=document.getElementsByClassName(“导航项下拉列表”);
navbar.innerHTML+=`;
让nav=document.getElementsByClassName(“下拉菜单”);
for(设i=0;i项目本身是正常创建的,onClick函数就是不起作用
我试图将此函数作为onload加载到body中,但它不起作用您可以轻松地完成它,下面是一个粗略的示例。因此,只需在
for
循环中添加事件侦听器即可
function generateLink(){
var container=document.getElementById(“container”);
var-textNode;
var节点;
[1,2,3,4,5].forEach(函数(i){
节点=document.createElement(“li”);
node.setAttribute(“id”,i);
textNode=document.createTextNode(“Hello”+i);
node.appendChild(textNode);
node.addEventListener(“单击”,函数(){
console.log(“hello”+i)
});
container.appendChild(节点);
});
}
生成线()代码>
您可以很容易地做到这一点,下面是一个粗略的示例。因此,只需在for
循环中添加事件侦听器即可
function generateLink(){
var container=document.getElementById(“container”);
var-textNode;
var节点;
[1,2,3,4,5].forEach(函数(i){
节点=document.createElement(“li”);
node.setAttribute(“id”,i);
textNode=document.createTextNode(“Hello”+i);
node.appendChild(textNode);
node.addEventListener(“单击”,函数(){
console.log(“hello”+i)
});
container.appendChild(节点);
});
}
生成线()代码>
我删除了API调用,以关注导致问题的代码:
async function getGenres() {
const genres = {
genres: [{ name: "pop" }, { name: "punk" }]
};
const navbar = document.getElementsByClassName("nav-item dropdown");
console.log("navbar", navbar);
let nav = document.createElement("div");
nav.className = "dropdown-menu";
for (let i = 0; i < genres.genres.length; i++) {
let a_tag = document.createElement("a");
let link = document.createTextNode(genres.genres[i].name);
a_tag.appendChild(link);
a_tag.className = "dropdown-item";
a_tag.href = "#";
nav.appendChild(a_tag);
}
navbar[0].appendChild(nav);
//This part should add separately to each element, but it does not work
//Here is error: Cannot set property 'click' of undefined at getGenres
const items = document.getElementsByClassName("dropdown-item");
for (let i = 0; i < genres.genres.length; i++) {
items[i].addEventListener("click", () => {
alert("get movies here for name" + genres.genres[i].name);
});
}
}
异步函数getGenres(){
常量类型={
类型:[{name:“pop”},{name:“朋克”}]
};
const navbar=document.getElementsByClassName(“导航项下拉列表”);
控制台日志(“导航栏”,导航栏);
让nav=document.createElement(“div”);
nav.className=“下拉菜单”;
for(设i=0;i{
提醒(“在此处获取电影名称”+genres.genres[i].name);
});
}
}
我删除了API调用,以关注导致问题的代码:
async function getGenres() {
const genres = {
genres: [{ name: "pop" }, { name: "punk" }]
};
const navbar = document.getElementsByClassName("nav-item dropdown");
console.log("navbar", navbar);
let nav = document.createElement("div");
nav.className = "dropdown-menu";
for (let i = 0; i < genres.genres.length; i++) {
let a_tag = document.createElement("a");
let link = document.createTextNode(genres.genres[i].name);
a_tag.appendChild(link);
a_tag.className = "dropdown-item";
a_tag.href = "#";
nav.appendChild(a_tag);
}
navbar[0].appendChild(nav);
//This part should add separately to each element, but it does not work
//Here is error: Cannot set property 'click' of undefined at getGenres
const items = document.getElementsByClassName("dropdown-item");
for (let i = 0; i < genres.genres.length; i++) {
items[i].addEventListener("click", () => {
alert("get movies here for name" + genres.genres[i].name);
});
}
}
异步函数getGenres(){
常量类型={
类型:[{name:“pop”},{name:“朋克”}]
};
const navbar=document.getElementsByClassName(“导航项下拉列表”);
控制台日志(“导航栏”,导航栏);
让nav=document.createElement(“div”);
nav.className=“下拉菜单”;
for(设i=0;i{
提醒(“在此处获取电影名称”+genres.genres[i].name);
});
}
}
谢谢@KiaiFighter。以下是最终代码:
async function getGenres() {
let url = "https://api.themoviedb.org/3/genre/movie/list?api_key=d80a54a0422d5fff6149c48741c8bece&language=en-US";
let response = await fetch(url);
let genres = await response.json();
const navbar = document.getElementsByClassName("nav-item dropdown");
let nav = document.createElement("div");
nav.className = "dropdown-menu";
for (let i = 0; i < genres.genres.length; i++) {
let a_tag = document.createElement("a");
let link = document.createTextNode(genres.genres[i].name);
a_tag.appendChild(link);
a_tag.className = "dropdown-item";
a_tag.href = "#";
nav.appendChild(a_tag);
}
navbar[0].appendChild(nav);
console.log("nav", nav);
const items = document.getElementsByClassName("dropdown-item");
for (let i = 0; i < genres.genres.length; i++) {
items[i].addEventListener("click", () => {
getMovies("discover/movie?api_key=d80a54a0422d5fff6149c48741c8bece&language=en-us&sort_by=popularity.desc&include_adult=false&include_video=false&page=1&with_genres=" + genres.genres[i].id);
});
}
console.log("navbar", navbar);
}
异步函数getGenres(){
让url=”https://api.themoviedb.org/3/genre/movie/list?api_key=d80a54a0422d5fff6149c48741c8bece&language=en-美国”;
let response=等待获取(url);
让genres=wait response.json();
const navbar=document.getElementsByClassName(“导航项下拉列表”);
让nav=document.createElement(“div”);
nav.className=“下拉菜单”;
for(设i=0;i