How i can create a object(div) on document? - javascript

I would like create one div on body, any time i send a request post to my localhost. But he return all time "document is not defined", someone can help me?
app.post('/tshirt/:id', (req, res) => {
url.push(req.body.Musica);
User.push(req.body.User);
for (let index = 0; index < url.length; ++index) {
let elemento = document.createElement("div");
let padre = document.body("sendMusics");
let referencia = document.getElementById("dsmuix")[index];
elemento.innerHTML='<div id="dsmuix" style="background-color:blue; width:97%; height: 75px;margin-top: 1px;margin-left: 2%;width: 50%;height: 100%;float: left;" ><label style="margin-top:15px;display:inline-block;margin-left: 5%;">'+url[index]+'(time)<br><br>   '+User[index]+'</label></div>';
padre.insertBefore(elemento, referencia);
}});
Can help me? Thanks

Use something like this
const createElement = () =>{
const newDiv = document.createElement("div");
newDiv.innerHTML = 'it works'
document.body.appendChild(newDiv)
}
document.body.onload = createElement
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
</body>
</html>

Related

How to open several tabs from the press of a button

i want to open several tabs when someone clicks this button.but my current code just opens the first.by the way this is a repost since the previous 1 had a lot of typos that i corrected
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<button id="hi" type="submit" onclick="redirect()">button</button>
</body>
</html>
<script>
function redirect(){
var window1 = 'https://google.com';
window.open(window1, '_blank');
var window2 = "https://www.youtube.com/watch?v=dQw4w9WgXcQ"
window.open(window2, '_blank');
var window3 = "https://www.youtube.com/shorts/AlvXHz2pUL4"
window.open(window3, '_blank');
var window4 = "https://www.youtube.com/watch?v=J2GVKuYoIww"
window.open(window4, '_blank');
var window5 = "https://www.youtube.com/watch?v=1Z6CHioIn3s&list=RDMMYrJqDCaeSZg&index=20"
window.open(window5, '_blank');
var window6 = "https://www.youtube.com/watch?v=KbNL9ZyB49c&list=RDKbNL9ZyB49c&start_radio=1&rv=KbNL9ZyB49c&t=32&t=32"
window.open(window6, '_blank');
var window7 = "https://www.youtube.com/watch?v=fB8TyLTD7EE&list=RDKbNL9ZyB49c&index=3"
window.open(window7, '_blank');
var window8 = "https://www.youtube.com/watch?v=Zasx9hjo4WY&list=RDKbNL9ZyB49c&index=8"
window.open(window8, '_blank');
var window9 = "https://www.youtube.com/watch?v=r6zIGXun57U&list=RDKbNL9ZyB49c&index=7"
window.open(window9, '_blank');
var window10 = "https://www.youtube.com/watch?v=v7HAVTyvLqI&list=RDKbNL9ZyB49c&index=8"
window.open(window10,'_blank');
}
</script>

on pressing the cancel button of a todo list item, it removes all the below to-do list items, here is the code of my to-do list

Here is my HTML and JS code:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>2-d0</title>
<link rel="stylesheet" href="styles.css">
</head>
<body>
<h2>2-D0</h2>
<div id="heading">
<textarea id="text"></textarea>
<button id="button">Add</button>
</div>
<div id="lists">
</div>
<script src="functions.js"></script>
</body>
</html>
Here is my Javascript code
'use strict'
const buttonclick = document.getElementById('button')
const list = document.getElementById('lists')
const a = "<span><button class = 'rbutton'>X</button></span>" //list-item button
const clickhandler = () => {
const text = document.getElementById('text')
//creating a list element
if(text.value != ''){
let Newdiv = document.createElement('div')
// appending elements
Newdiv.innerHTML = text.value + a
list.appendChild(Newdiv)
let b = document.getElementsByClassName('rbutton')
if(b !=[]){
for(let i = 0; i < b.length; i++){
b[i].addEventListener('click', function(){
b[i].parentElement.parentElement.remove();
console.log(b)
})
}
}
//reseting the textarea value
text.value = ''
}
}
buttonclick.addEventListener('click', clickhandler)
An error in shown on delete a item: Cannot read property 'parentElement' of undefined at HTMLButtonElement. .
Can someone please explain what is wrong in my code and what does the error mean.
thankyou
On every click of the button you are attaching event handlers to the whole group again.
On the first iteration, 1st button has one delete handler.
On second iteration, 1st button has 2 event handler(one for buttons[0] and one for buttons[1]), and 2nd has one.
So on.
Use this. It will always point to the element to the event on which the event handler is attached:
this.parentElement.parentElement.remove();
Another way is to simply use this.parentElement.parentElement.remove()
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>2-d0</title>
<link rel="stylesheet" href="styles.css">
</head>
<body>
<h2>2-D0</h2>
<div id="heading">
<textarea id="text"></textarea>
<button id="button">Add</button>
</div>
<div id="lists">
</div>
<script>
"use strict";
const buttonclick = document.getElementById('button');
const list = document.getElementById('lists');
const a = "<span><button class = 'rbutton'>X</button></span>"; //list-item button
const clickhandler = () => {
const text = document.getElementById('text');
//creating a list element
if(text.value != '') {
let Newdiv = document.createElement('div');
// appending elements
Newdiv.innerHTML = text.value + a;
list.appendChild(Newdiv);
let b = document.getElementsByClassName('rbutton');
for(let i = 0; i < b.length; i++) {
b[i].addEventListener('click', function() {
this.parentElement.parentElement.remove();
});
}
//reseting the textarea value
text.value = '';
}
}
buttonclick.addEventListener('click', clickhandler);
</script>
</body>
</html>
You should use window.event.target.parentElement... to get the button instead of b[i].parentElement....
"use strict";
const buttonclick = document.getElementById('button');
const list = document.getElementById('lists');
const a = "<span><button class = 'rbutton'>X</button></span>"; //list-item button
const clickhandler = () => {
const text = document.getElementById('text');
//creating a list element
if(text.value != '') {
let Newdiv = document.createElement('div');
// appending elements
Newdiv.innerHTML = text.value + a;
list.appendChild(Newdiv);
let b = document.getElementsByClassName('rbutton');
for(let i = 0; i < b.length; i++) {
b[i].addEventListener('click', function() {
window.event.target.parentElement.parentElement.remove();
});
}
//reseting the textarea value
text.value = '';
}
}
buttonclick.addEventListener('click', clickhandler);
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>2-d0</title>
<link rel="stylesheet" href="styles.css">
</head>
<body>
<h2>2-D0</h2>
<div id="heading">
<textarea id="text"></textarea>
<button id="button">Add</button>
</div>
<div id="lists">
</div>
</body>
</html>

Switch title text with javascript? HTML / JS

I'm new to JavaScript and I've been trying to get the title text to switch between different texts for a day now. I've gathered some code snippets and put them together, so I'm not quite sure what's going on.
function sleep(milliseconds) {
const date = Date.now();
let currentDate = null;
do {
currentDate = Date.now();
} while (currentDate - date < milliseconds);
}
function switchingText(); {
document.getElementByID("title").innerHTML = "Text";
sleep(2000);
document.getElementByID("title").innerHTML = "Text2";
sleep(2000);
switchingText();
}
I would appreciate any help greatly.
This is a sample solution for your dilemma:
const title= document.getElementById("title");
const switchHeading = () => {
if (title.innerHTML== "Text"){
title.innerHTML = "Text2";
}else{
title.innerHTML = "Text";
}
}
setInterval(() => {
switchHeading()
}, 2000);
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title></title>
<meta name="description" content="">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="">
</head>
<body>
<h1 id="title">Text</h1>
<script src="./script.js" async defer></script>
</body>
</html></html>
Helpful links:
W3Schools Set Interval
All you need to do is get the title element like you did but instead of changing the InnerHTML, change the value, like so:
document.getElementByID('title').value="Text"
Hope you found what you were looking for.
Instead of doing
document.getElementByID("title").innerHTML = "Text";
in the switching text function,
you need to do
document.title = 'your text'

How to create a bootstrap list group with two arrays?

I'm currently creating a dashboard and I want to create a "Bootstrap List Group" which should show a list of friends of the current dashboard.
I have given to arrays like this:
friendsID[id1, id2, id3]
friendsName[name1, name2, name3]
I want to create a method in javascript so that the result looks like this.
<div class="list-group">
name1
name2
name3
</div>
Would love to here how you would manage this because I am a little bit desperate and have no clue how to do this.
Here You can use document.write() to solve the problem it is used when the path for the html is not needed
var friendsID = ['id1','id2','id3'];
var i=0;
var friendName = ['name1','name2','name3'];
console.log(friendName[2]);
idplace();
function idplace(){
for(i=0;i<friendsID.length;i++)
{
document.write("<a href='/dashboard/"+friendsID[i]+"' class='list-group-item list-group-item-action'>"+friendName[i]+"</a><br>")
}
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<script src="./java.js"></script>
</body>
</html>
Or You can Use Innerhtml in this the path inside which div the html must be kept is determined by the programmer.
var friendsID = ['id1','id2','id3'];
var i=0;
var statement =[0,0,0];
var friendName = ['name1','name2','name3'];
console.log(friendName[2]);
idplace();
function idplace(){
for(i=0;i<friendsID.length;i++)
{
statement[i]="<a href='google.com/"+friendsID[i]+"'>"+friendName[i]+"</a><br>";
console.log(statement[i]);
document.getElementById("hello").innerHTML+=statement[i];
}
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<div id="hello"></div>
<script src="./java.js"></script>
</body>
</html>
You can do something like this
const friendsID = ["id1", "id2", "id3"]
const friendsName = ["name1", "name2", "name3"]
let i = 0;
for (i = 0; i < friendsID.length; i++) {
let list = '' + friendsName[i] + ""
$(".list-group").append(list)
}
<div class="list-group">
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
check this out
https://jsfiddle.net/cloud_zero/hacLpe3g/4/
var arry1 = ["name1", "name2", "name3"];
var arry2 = ["id1", "id2", "id3"];
// merging two array
var result = arry1.reduce(function(acc, cur, index) {
return Object.assign(acc, { [arry2[index]]: cur })
}, {})
// generating links
var text = Object.keys(result).map(function(key) {
return `${ result[key] }`;
});
// finally adding to dom
document.querySelector('.list-group').innerHTML = text.join('');
first i merged two array to object (result)
then i generate links from the result
lastly linked added to DOM
First of all thank you for your great solutions!
I also tried my best and came up with this here.
var friendsIDs = ["id1", "id2", "id3"];
var friendsNames = ["name1", "name2", "name3"];
var friendLinks = [];
for (i=0; i < friendsIDs.length; i++){
friendLinks.push("<a href=/dashboard/" + friendsIDs[i] + " class=\'list-group item list-group-item-action\' >" + friendsNames[i] + "</a>")
}
//Create HTML Element for the Company Relations
var linkTarget = document.getElementById('linkTarget');
for(i=0; i < friendLinks.length; i++){
linkTarget.innerHTML += friendLinks[i];
}
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" rel="stylesheet"/>
<div class="list-group" id="linkTarget"></div>

Trying to create a random word game that will output a function with a click of an html button

I'm trying to create a word game that will choose a random item from a list but some of the items have different weights so they show up less often. I want the function to be called once the user presses a HTML button. I have the code working fairly well right now (to the console). My question is how can I get the output from the function into the html web page. If anyone could help me with this, it would be a huge help.
Here's my code:
var item = {
'apple':10,
'banana':10,
'orange':10,
'grapes':1,
}
function testGame(input) {
var array = [];
for(var item in input) {
if(input.hasOwnProperty(item) ) {
for(var i=0; i<input[item]; i++ ) {
array.push(item);
}
}
}
return array[Math.floor(Math.random() * array.length)];
}
console.log(testGame(item));
I have some HTML code too, just don't know where or how to write the button code properly to produce the outcome I'm looking for.
Here's the HTML
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Randomizer Game</title>
</head>
<body>
<h1>Game</h1>
<script src="index.js"></script>
<button onclick="testGame();">Test</button>
</body>
</html>
You can make new function where you can call it on button just like you called it with console.log:
<button onclick="start();">Test</button>
and call your randomizing function inside:
function start() {
testGame(item)
}
Then inside function testGame don't use return, just save random word result in variable and print it in HTML:
var result = array[Math.floor(Math.random() * array.length)];
console.clear();
console.log(result);
document.getElementById("result").innerHTML=result;
I have added div result in HTML:
<div id="result"></div>
EXAMPLE SNIPPET:
var item = {
'apple': 10,
'banana': 10,
'orange': 10,
'grapes': 1,
}
function testGame(input) {
var array = [];
for (var item in input) {
if (input.hasOwnProperty(item)) {
for (var i = 0; i < input[item]; i++) {
array.push(item);
}
}
}
var result = array[Math.floor(Math.random() * array.length)];
console.clear();
console.log(result);
document.getElementById("result").innerHTML=result;
}
function start() {
testGame(item)
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Randomizer Game</title>
</head>
<body>
<h1>Game</h1>
<div id="result"></div>
<script src="index.js"></script>
<button onclick="start();">Test</button>
</body>
</html>
Use getElementById to get an element by id, for this I gave your button an id. With addEventListener you can add an event (here: click) to be call a function.
Doing here your randomizing. Get the element where you want the output again with getElementByIdand add with textContent your answer to it.
const ITEMS = {
'apple':10,
'banana':10,
'orange':10,
'grapes':1,
}
document.getElementById('btn').addEventListener('click', function testGame() {
var array = [];
for(var item in ITEMS) {
if(ITEMS.hasOwnProperty(item) ) {
for(var i=0; i<ITEMS[item]; i++ ) {
array.push(item);
}
}
}
document.getElementById('item').textContent = array[Math.floor(Math.random() * array.length)];
});
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Randomizer Game</title>
</head>
<body>
<h1>Game</h1>
<button id='btn'>Test</button>
<div id='item'></div>
</body>
</html>

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