I've searched the internet but I can't seem to find anything that works for me.
Here is the code:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Heating System Control</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script>
strLED1 = "";
strLED2 = "";
strText1 = "";
strText2 = "";
var LED1_state = 0;
var LED2_state = 0;
function GetArduinoIO()
{
nocache = "&nocache=" + Math.random() * 1000000;
var request = new XMLHttpRequest();
request.onreadystatechange = function()
{
if (this.readyState == 4) {
if (this.status == 200) {
if (this.responseXML != null)
{
// XML file received - contains analog values, switch values and LED states
document.getElementById("input1").innerHTML =
this.responseXML.getElementsByTagName('analog')[0].childNodes[0].nodeValue;
document.getElementById("input2").innerHTML =
this.responseXML.getElementsByTagName('analog')[1].childNodes[0].nodeValue;
// LED 1
if (this.responseXML.getElementsByTagName('LED')[0].childNodes[0].nodeValue === "on") {
document.getElementById("LED1").innerHTML = "ON";
document.getElementById("LED1").style.backgroundColor = "green";
document.getElementById("LED1").style.color = "white";
LED1_state = 1;
}
else {
document.getElementById("LED1").innerHTML = "OFF";
document.getElementById("LED1").style.backgroundColor = "red";
document.getElementById("LED1").style.color = "white";
LED1_state = 0;
}
// LED 2
if (this.responseXML.getElementsByTagName('LED')[1].childNodes[0].nodeValue === "on") {
document.getElementById("LED2").innerHTML = "ON";
document.getElementById("LED2").style.backgroundColor = "green";
document.getElementById("LED2").style.color = "white";
LED2_state = 1;
}
else {
document.getElementById("LED2").innerHTML = "OFF";
document.getElementById("LED2").style.backgroundColor = "red";
document.getElementById("LED2").style.color = "white";
LED2_state = 0;
}
}
}
}
}
// send HTTP GET request with LEDs to switch on/off if any
request.open("GET", "ajax_inputs" + strLED1 + strLED2 + nocache, true);
request.send(null);
setTimeout('GetArduinoIO()', 1000);
strLED1 = "";
strLED2 = "";
}
function GetButton1()
{
if (LED1_state === 1)
{
LED1_state = 0;
strLED1 = "&LED1=0";
}
else
{
LED1_state = 1;
strLED1 = "&LED1=1";
}
}
function GetButton2()
{
if (LED2_state === 1)
{
LED2_state = 0;
strLED2 = "&LED2=0";
}
else
{
LED2_state = 1;
strLED2 = "&LED2=1";
}
}
function SendText1()
{
nocache = "&nocache=" + Math.random() * 1000000;
var request = new XMLHttpRequest();
strText2 = "&txt2=" + document.getElementById("txt_form1").form_text1.value + "&end2=end";
request.open("GET", "ajax_inputs" + strText2 + nocache, true);
request.send(null);
}
function SendText2()
{
nocache = "&nocache=" + Math.random() * 1000000;
var request = new XMLHttpRequest();
strText1 = "&txt1=" + document.getElementById("txt_form2").form_text2.value + "&end1=end";
request.open("GET", "ajax_inputs" + strText1 + nocache, true);
request.send(null);
}
function clsTxt1()
{
setTimeout(
function clearTxt()
{
document.getElementById("txt_form1").form_text1.value = "";
}, 500)
}
function clsTxt2()
{
setTimeout(
function clearTxt()
{
document.getElementById("txt_form2").form_text2.value = "";
}, 500)
}
function Threshold1()
{
var thr1 = document.getElementById("txt_form1").form_text1.value;
document.getElementById("thresh1").innerHTML = thr1;
}
function Threshold2()
{
var thr2 = document.getElementById("txt_form2").form_text2.value;
document.getElementById("thresh2").innerHTML = thr2;
}
</script>
<style>
.IO_box
{
float: left;
margin: 0 20px 20px 0;
border: 1px solid black;
padding: 0 5px 0 5px;
width: 100px;
height: 196px;
text-align: center;
}
h1
{
font-family: Helvetica;
font-size: 120%;
color: blue;
margin: 5px 0 10px 0;
text-align: center;
}
h2
{
font-family: Helvetica;
font-size: 85%;
color: black;
margin: 10px 0 5px 0;
text-align: center;
}
p, form
{
font-family: Helvetica;
font-size: 80%;
color: #252525;
text-align: center;
}
button
{
font-family: Helvetica;
font-size: 80%;
max-width: 100px;
width: 90px;
height: 25px;
margin: 0 auto;
text-align: center;
border: none;
}
input
{
font-family: Helvetica;
font-size: 80%;
max-width: 100px;
width: 90px;
height: 25px;
margin: 0 auto;
text-align: center;
border: none;
}
.small_text
{
font-family: Helvetica;
font-size: 70%;
color: #737373;
text-align: center;
}
textarea
{
resize: none;
max-width: 90px;
margin-bottom: 1px;
text-align: center;
}
</style>
</head>
<body onload="GetArduinoIO(); Threshold1()">
<h1>Heating System Control</h1>
<div class="IO_box">
<h2>Room One</h2>
<p>Temp1 is: <span id="input1">...</span></p>
<button type="button" id="LED1" onclick="GetButton1()" color="white" backgroundColor="red" style="border: none;">OFF</button><br /><br />
<form id="txt_form1" name="frmText">
<textarea name="form_text1" rows="1" cols="10"></textarea>
</form>
<input type="submit" value="Set Temp" onclick="SendText1(); clsTxt1(); Threshold1();" style ="background-color:#5F9EA0" />
<p>Threshold: <span id="thresh1">...</span></p>
</div>
<div class="IO_box">
<h2>Room Two</h2>
<p>Temp2 is: <span id="input2">...</span></p>
<button type="button" id="LED2" onclick="GetButton2()" color="white" backgroundColor="red" style="border: none;">OFF</button><br /><br />
<form id="txt_form2" name="frmText">
<textarea name="form_text2" rows="1" cols="10"></textarea>
</form>
<input type="submit" value="Set Temp" onclick="SendText2(); clsTxt2(); Threshold2();" style ="background-color:#5F9EA0" />
<p>Threshold: <span id="thresh2">...</span></p>
</div>
</body>
</html>
So my question is, How can I keep the value inserted in the text area even after I reload the page (from the "Threshold1()" function)? I found a few examples with "localStorage" and JQuery, but I have no idea how to call the saved value when I reload the page.
Any help would be appreciated.
Thanks in advance,
Stefan.
Local Storage Explained
The localStorage object likes to store strings, so how would one store large objects, let's say some complex data structure? - Simple, JavaScript has a neat function built in, look up JSON.stringify(object). So all you would need to do is something like below to store some complex object is something like the code I've provided below. Then to retrieve an object from the localStorage you'll want to use JSON.parse(object);.
To look into localStorage, I strongly suggest you take a look at the likes of MDN and if you want to look into the JSON.parse and JSON.stringify functions, you can also find them both here:
JSON.parse() link
JSON.stringify() link
// vanilla js version of $(document).ready(function(){/*code here*/});
window.ready = function(fnc) {
if (typeof fnc != "function") {
return console.error("You need to pass a function as a param.");
}
try { // try time out for some old IE bugs
setTimeout(function () {
document.addEventListener("DOMContentLoaded", fnc());
}, 10)
} catch (e) {
try { // sometimes timeout won't work
document.addEventListener("DOMContentLoaded", fnc());
} catch (ex) {
console.log(ex);
}
}
};
// shorter than $(document).ready();
ready(function() {
var object = {
name: "Jack",
age: 30,
location: "U.S.A.",
get_pay: function() {
console.log("test");
}
},
test;
console.log(object);
var obj_string = JSON.stringify(object);
// run a test
var run_test = function() {
// output the stored object
test = localStorage.getItem("test");
console.log(test);
// to make js turn it into an object again
test = JSON.parse(localStorage.getItem("test"));
console.log(test);
};
// demo of trying to store an actual object
try {
localStorage.setItem("test", object);
run_test();
} catch (e) {
console.log(e);
}
// demo of trying to store the string
try {
localStorage.setItem("test", obj_string);
run_test();
} catch (e) {
console.log(e);
}
});
You can use this JSFiddle : http://jsfiddle.net/xpvt214o/45115/
here we are using Cookie concept and jquery.cookie.js to accomplish what you are trying to do.
to properly check the fiddle you need to press "Run" every time, you can open the same fiddle in 2 tabs write something in the first fiddle then just press run in the 2nd fiddle tab the value should automatically update, here the
$(function(){}); replicates your pageload
My question isn't exactly answered, but I completely avoided storing info on a device. Now I'm just reading the value straight from the arduino and it works. But thanks to everyone that provided some help.
Related
We have the usual example code where everything works.
(myFunction gets triggered on an onclick event.)
"use strict";
console.clear();
const obj = {
name: "falana",
count: 0
};
function myFunction() {
obj.count++;
console.log(obj.count);
console.log(obj.name);
console.log(obj);
}
---Output---
1
"falana"
// [object Object]
{
"name": "falana",
"count": 1
}
From this example, we can access a global object obj inside another function (in this case, myFunction) without any ReferenceError.
I was trying to create a single page Twitter clone (only DOM manipulation) and kept getting this error.
Uncaught ReferenceError: Cannot access 'userData' before initialization at postMessage
---Javascript that's causing error---
window.onload = function() {
console.clear();
}
const userData = {
username: 'Chinmay Ghule',
userhandle: generateUserhandle(this.username),
userPostCount: 0
};
function generateUserhandle(userData) {
const usernameArr = userData.username.split(" ");
usernameArr.forEach(element => {
element.toLowerCase();
});
return "#" + usernameArr.join("");
}
// posts message entered in #message-text to
// message-output-container.
function postMessage() {
console.log(userData);
// get message from #message-text.
const message = document.getElementById('message-text').value;
console.log(`message: ${message}`);
// check for length.
console.log(`message length: ${message.length}`);
if (message.length === 0) {
return;
}
// create new div.
const card = document.createElement('div');
const userInfo = document.createElement('div');
const userMessage = document.createElement('div');
const usernameSpan = document.createElement('span');
const userhandleSpan = document.createElement('span');
const beforeTimeDotSpan = document.createElement('span');
const timeSpan = document.createElement('span');
usernameSpan.classList.add('username');
userhandleSpan.classList.add('userhandle');
beforeTimeDotSpan.classList.add('before-time-dot');
timeSpan.classList.add('time');
userInfo.appendChild(usernameSpan);
userInfo.appendChild(userhandleSpan);
userInfo.appendChild(beforeTimeDotSpan);
userInfo.appendChild(timeSpan);
console.log(`userInfo : ${userInfo}`);
userInfo.classList.add('user-info');
userMessage.classList.add('output-message');
card.appendChild(userInfo);
card.appendChild(userMessage);
console.log(`card : ${card}`);
card.classList.add('output-message');
userMessage.innerText = message;
// check for number of posts.
if (userData.userPostCount === 0) {
let noMessageDiv = document.getElementById("no-message-display");
noMessageDiv.remove();
}
// append new div.
const messageOutputContainer = document.getElementById('message-output-container');
messageOutputContainer.appendChild(card);
// increment userPostCount.
userData.userPostCount++;
}
Why am i getting this ReferenceError in this case, while it didn't in our first example code?
Your code had quite some issues...
The biggest change here was getting rid of generateUserhandle entirely and making it with a getter.
get userhandle() {
return this.username.toLowerCase()
},
Working demo
window.onload = function() {
console.clear();
}
const userData = {
username: 'Chinmay Ghule',
get userhandle() {
return this.username.toLowerCase()
},
userPostCount: 0
};
// posts message entered in #message-text to
// message-output-container.
function postMessage() {
console.log(userData);
// get message from #message-text.
const message = document.getElementById('message-text').value;
console.log(`message: ${message}`);
// check for length.
console.log(`message length: ${message.length}`);
if (message.length === 0) {
return;
}
// create new div.
const card = document.createElement('div');
const userInfo = document.createElement('div');
const userMessage = document.createElement('div');
const usernameSpan = document.createElement('span');
const userhandleSpan = document.createElement('span');
const beforeTimeDotSpan = document.createElement('span');
const timeSpan = document.createElement('span');
usernameSpan.classList.add('username');
userhandleSpan.classList.add('userhandle');
beforeTimeDotSpan.classList.add('before-time-dot');
timeSpan.classList.add('time');
userInfo.appendChild(usernameSpan);
userInfo.appendChild(userhandleSpan);
userInfo.appendChild(beforeTimeDotSpan);
userInfo.appendChild(timeSpan);
console.log(`userInfo : ${userInfo}`);
userInfo.classList.add('user-info');
userMessage.classList.add('output-message');
card.appendChild(userInfo);
card.appendChild(userMessage);
console.log(`card : ${card}`);
card.classList.add('output-message');
userMessage.innerText = message;
// check for number of posts.
if (userData.userPostCount === 0) {
let noMessageDiv = document.getElementById("no-message-display");
noMessageDiv.remove();
}
// append new div.
const messageOutputContainer = document.getElementById('message-output-container');
messageOutputContainer.appendChild(card);
// increment userPostCount.
userData.userPostCount++;
}
*,
*::before,
*::after {
box-sizing: border-box;
}
body {
margin: 0px;
padding: 0px;
font-family: Arial, Helvetica, sans-serif;
}
#container {
/*background-color: lightskyblue;*/
margin: 2.5rem 25%;
}
#user-info {
/*background-color: orange;*/
padding-bottom: 0.5rem;
}
.username {
font-weight: bold;
}
.userhandle,
.before-time-dot,
.time {
opacity: 0.75;
}
#message-text {
width: 100%;
margin-bottom: 0.5rem;
font-size: 18px;
padding: 0.5rem;
resize: none;
border-radius: 0.5rem;
outline: 1px solid lightgray;
}
#message-button {
float: right;
padding: 0.375rem 1.5rem;
font-weight: bold;
font-size: 18px;
border-radius: 1rem;
}
#message-button:hover {
background-color: lightgray;
}
#message-input-container {
background-color: lightskyblue;
padding: 1rem;
border-radius: 0.5rem;
}
#message-input-container::after {
content: "";
clear: both;
display: table;
}
#message-output-container {
/*background-color: lightskyblue;*/
margin-top: 30px;
border-top: 3px solid black;
}
#no-message-display {
text-align: center;
padding: 0.5rem;
}
.output-message {
padding: 0.5rem;
font-size: 18px;
border-bottom: 1px solid lightgray;
}
<div id="container">
<div id="message-input-container">
<textarea id="message-text" rows="5" placeholder="Type your message here..." contenteditable="" value=""></textarea>
<input id="message-button" type="button" value="Post" onclick="postMessage();" />
</div>
<div id="message-output-container">
<div id="no-message-display">
<span>No messages yet!</span>
</div>
</div>
</div>
I'm trying to create a quiz that tests users awareness of real and fake emails. What I want to do is have the question displayed at the top saying "Real or Fake", then have an image displayed underneath which the user needs to look at to decided if it's real or fake. There are two buttons, real and fake, and regardless of whether they choose the right answer I want to swap the original image with annotated version - showing how users could spot that it was fake or real.
But I'm not sure how to show the annotated version once the answer has been submitted. Could someone help?
function Quiz(questions) {
this.score = 0;
this.questions = questions;
this.questionIndex = 0;
}
Quiz.prototype.getQuestionIndex = function() {
return this.questions[this.questionIndex];
}
Quiz.prototype.guess = function(answer) {
if (this.getQuestionIndex().isCorrectAnswer(answer)) {
this.score++;
}
this.questionIndex++;
}
Quiz.prototype.isEnded = function() {
return this.questionIndex === this.questions.length;
}
function Question(text, choices, answer) {
this.text = text;
this.choices = choices;
this.answer = answer;
}
Question.prototype.isCorrectAnswer = function(choice) {
return this.answer === choice;
}
function populate() {
if (quiz.isEnded()) {
showScores();
} else {
// show question
var element = document.getElementById("question");
element.innerHTML = quiz.getQuestionIndex().text;
// show options
var choices = quiz.getQuestionIndex().choices;
for (var i = 0; i < choices.length; i++) {
var element = document.getElementById("choice" + i);
element.innerHTML = choices[i];
guess("btn" + i, choices[i]);
}
showProgress();
}
};
function guess(id, guess) {
var button = document.getElementById(id);
button.onclick = function() {
quiz.guess(guess);
populate();
}
};
function showProgress() {
var currentQuestionNumber = quiz.questionIndex + 1;
var element = document.getElementById("progress");
element.innerHTML = "Question " + currentQuestionNumber + " of " + quiz.questions.length;
};
function showScores() {
var gameOverHTML = "<h1>Result</h1>";
gameOverHTML += "<h2 id='score'> Your scores: " + quiz.score + "</h2>";
var element = document.getElementById("quiz");
element.innerHTML = gameOverHTML;
};
// create questions here
var questions = [
new Question("<img src= 'netflix_fake.jpg' />", ["Real", "Fake"], "Fake"),
new Question("<img src= 'dropbox_real.jpg' />", ["Real", "Fake"], "Real"),
new Question("<img src= 'gov_real.jpg' />", ["Real", "Fake"], "Real"),
new Question("<img src= 'paypal_fake.jpg' />", ["Real", "Fake"], "Fake"),
new Question("<img src= 'gmail.jpg' />", ["Real", "Fake"], "Fake")
];
//create quiz
var quiz = new Quiz(questions);
// display
populate();
body {
background-color: #538a70;
}
.grid {
width: 600px;
height: 500px;
margin: 0 auto;
background-color: #fff;
padding: 10px 50px 50px 50px;
border: 2px solid #cbcbcb;
}
.grid h1 {
font-family: "sans-serif";
font-size: 60px;
text-align: center;
color: #000000;
padding: 2px 0px;
}
#score {
color: #000000;
text-align: center;
font-size: 30px;
}
.grid #question {
font-family: "monospace";
font-size: 30px;
color: #000000;
}
.buttons {
margin-top: 30px;
}
#btn0,
#btn1,
#btn2,
#btn3 {
background-color: #a0a0a0;
width: 250px;
font-size: 20px;
color: #fff;
border: 1px solid #1D3C6A;
margin: 10px 40px 10px 0px;
padding: 10px 10px;
}
#btn0:hover,
#btn1:hover,
#btn2:hover,
#btn3:hover {
cursor: pointer;
background-color: #00994d;
}
#btn0:focus,
#btn1:focus,
#btn2:focus,
#btn3:focus {
outline: 0;
}
#progress {
color: #2b2b2b;
font-size: 18px;
}
<div class="grid">
<div id="quiz">
<h1>Can you spot the fake email?</h1>
<hr style="margin-bottom: 20px">
<p id="question"></p>
<div class="buttons">
<button id="btn0"><span id="choice0"></span></button>
<button id="btn1"><span id="choice1"></span></button>
</div>
<hr style="margin-top: 50px">
<footer>
<p id="progress">Question x of y</p>
</footer>
</div>
</div>
When user clicks button I trigger class and I add it second name, on second I have written to get swapped, I wrote you basically full project, and please read the whole comments, to understand logic
//Calling Elements from DOM
const button = document.querySelectorAll(".check");
const images = document.querySelectorAll(".image");
const answer = document.querySelector("h1");
//Declaring variable to randomly insert any object there to insert source in DOM Image sources
let PreparedPhotos;
//Our Images Sources and With them are its fake or not
//fake: true - yes its fake
//fake: false - no its real
const image = [
[
{
src:
"https://upload.wikimedia.org/wikipedia/commons/thumb/e/ec/Mona_Lisa%2C_by_Leonardo_da_Vinci%2C_from_C2RMF_retouched.jpg/1200px-Mona_Lisa%2C_by_Leonardo_da_Vinci%2C_from_C2RMF_retouched.jpg",
fake: true
},
{
src:
"http://graphics8.nytimes.com/images/2012/04/13/world/europe/mona-lisa-like-new-images/mona-lisa-like-new-images-custom4-v3.jpg",
fake: false
}
],
[
{
src:
"https://cdn.shopify.com/s/files/1/0849/4704/files/Creacion_de_Adan__Miguel_Angel_f5adb235-bfa8-4caa-8ffb-c5328cbad953_grande.jpg?12799626327330268216",
fake: false
},
{
src:
"https://cdn.shopify.com/s/files/1/0849/4704/files/First-image_Fb-size_grande.jpg?10773543754915177139",
fake: true
}
]
];
//Genrating Random Photo on HTML
function setRandomPhoto() {
//Random Number which will be length of our array of Object
//if you array includes 20 object it will generate random number
// 0 - 19
const randomNumber = Math.floor(Math.random() * image.length);
//Decalaring our already set variable as Array Object
PreparedPhoto = image[randomNumber];
//Our first DOM Image is Variables first object source
images[0].src = PreparedPhoto[0].src;
//and next image is next object source
images[1].src = PreparedPhoto[1].src;
}
//when windows successfully loads, up function runs
window.addEventListener("load", () => {
setRandomPhoto();
});
//buttons click
//forEach is High Order method, basically this is for Loop but when you want to
//trigger click use forEach - (e) is single button whic will be clicked
button.forEach((e) => {
e.addEventListener("click", () => {
//decalring variable before using it
let filtered;
//finding from our DOM image source if in our long array exists
//same string or not as Image.src
//if it exists filtered variable get declared with that found obect
for (let i = 0; i < image.length; i++) {
for (let k = 0; k < 2; k++) {
if (image[i][k].src === images[0].src) {
filtered = image[i][k];
}
}
}
//basic if else statement, if clicked button is Fake and image is true
//it outputs You are correct
//if clicked button is Real and Image is false it outputs Correct
//Else its false
//Our image checking comes from filtered variable
if (e.innerText === "Fake" && filtered.fake === true) {
answer.innerText = "You Are Correct";
images.forEach((image) => {
image.classList.toggle("hidden");
});
} else if (e.innerText === "Real" && filtered.fake === false) {
answer.innerText = "You Are Correct";
images.forEach((image) => {
image.classList.toggle("hidden");
});
} else {
answer.innerHTML = "You are Wrong";
images.forEach((image) => {
image.classList.toggle("hidden");
});
}
});
});
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
.container {
width: 100%;
min-height: 100vh;
display: flex;
justify-content: space-around;
align-items: center;
flex-direction: column;
}
.image-fluid {
display: flex;
}
.image-fluid .image {
width: 200px;
margin: 0 10px;
transition: 0.5s;
}
.image-fluid .image:nth-child(1).hidden {
transform: translateX(110px);
}
.image-fluid .image:nth-child(2).hidden {
transform: translateX(-110px);
}
<div class="container">
<div class="image-fluid">
<img src="" class="image hidden">
<img src="" class="image hidden">
</div>
<div class="button-fluid">
<button class="check">Fake</button>
<button class="check">Real</button>
</div>
</div>
<h1></h1>
So, i want a reset button to appear on my page when the score of the player reaches 5. But i can't seem to make it appear.
if (Score == 5) {
btnQuestion.disabled = true;
txtQuestionFeedback.innerText = "Correct! \n Congratulations, you've got 5 stars!";
imgScore5.src = "Images/StarOn.gif";
document.getElementById(btnReset).innerHTML = btnReset;
}
Try the following:
1) Insert your button element inside a DIV like this for easier reading
<div id="resetButtonDiv">
<button id="resetButton"></button> <!-- here goes your button config -->
</div>
2) Change the style like this using JS
<script>
function showResetButton() {
document.getElementById("resetButton").style.display = "none";
if (Score == 5) {
// Replace "Score" with your variable or element
document.getElementById("resetButton").style.display = "show";
}
}
showResetButton()
</script>
This was my way to do it:
ScoreBoard = function(sId, sIntoNode = '', fnOnChange = null) {
this.m_sId = sId != '' ? sId : 'scoreboard';
this.m_iScore = 0;
this.m_fnOnChange = fnOnChange;
if(sIntoNode != '') {
let TargetNode = document.getElementById(sIntoNode);
if(TargetNode) {
TargetNode.innerHTML = TargetNode.innerHTML + '<div class="scoreboard-score" id="' + this.m_sId + '">0</div>';
}
}
}
ScoreBoard.prototype.SetScore = function(iNewScore) {
this.m_iScore = iNewScore;
let scoreBoard = document.getElementById(this.m_sId);
if(scoreBoard) {
scoreBoard.innerHTML = this.m_iScore;
}
if(this.m_fnOnChange && typeof this.m_fnOnChange == 'function') {
this.m_fnOnChange(this);
}
}
ScoreBoard.prototype.AddScore = function(iAmount) {
this.SetScore(this.m_iScore + iAmount);
}
ScoreBoard.prototype.Reset = function() {
this.SetScore(0);
}
ScoreBoard.prototype.GetScore = function() {
return this.m_iScore;
}
function OnScoreChange(target) {
let resetBtn = document.getElementById('myScore-reset');
if(resetBtn) {
if(target.GetScore() >= 5) {
resetBtn.style.display = "block";
} else {
resetBtn.style.display = "none";
}
}
}
var myScore = new ScoreBoard('myScore', 'score', OnScoreChange);
var i = 0;
function test() {
myScore.AddScore(1);
i++;
if(i < 20) setTimeout(test, 1000);
}
test();
div#score {
padding: 12px;
background-color: darkgrey;
font-family: Arial;
border-radius: 12px;
box-shadow: 0 0 12px 3px black;
}
div.score-head {
background-color: black;
color: white;
padding: 6px;
border-top-left-radius: 6px;
border-top-right-radius: 6px;
}
div.scoreboard-score {
background-color: #EAEAEA;
padding: 6px;
border-bottom-left-radius: 6px;
border-bottom-right-radius: 6px;
}
div#score button {
display: none;
}
<div id="score">
<button onClick="myScore.Reset();" id="myScore-reset">Reset Score</button>
<div class="score-head">Score:</div>
</div>
I've sorted it guys!
Instead, i just used a visibility attribute on the button to hide it on page startup. And then called on that attribute in a Function for HideButton().
```
function ShowResetButton() {
document.getElementById("btnReset").style.visibility = "visible";
}
```
But thank you all for your input! i really appreciate it!
Take it easy,
Happy coding!
For a project im working on i want to make my hybrid app (phonegap) switch screens when the app detects the BluetoothLE signal from an Arduino. For this I made the code loop trough a couple of list items and check of the content of the li item is the same as "TEST123"(the name i gave the Arduino). If these would be the same, the app should switch to another page. I edited the code called "cordova-plugin-ble-central made by Don Coleman on GitHub) to reach this goal.
I made the code so it would scroll trough the li items within a ul, read the content and called the connect function if the string was the same as "TEST123", but my pages do not seem to switch.
Thanks for your help!
HTML:
<body>
<div class="app">
<h1>BluefruitLE</h1>
<div id="mainPage" class="show">
<ul id="deviceList">
</ul>
<button id="refreshButton">Refresh</button>
</div>
<div id="detailPage" class="hide">
<div id="resultDiv"></div>
<div>
<input type="text" id="messageInput" value="Hello"/>
<button id="sendButton">Send</button>
</div>
<button id="disconnectButton">Disconnect</button>
</div>
</div>
<script type="text/javascript" src="cordova.js"></script>
<script type="text/javascript" src="js/index.js"></script>
<script type="text/javascript">
app.initialize();
</script>
</body>
CSS:
body {
font-family: "Helvetica Neue";
font-weight: lighter;
color: #2a2a2a;
background-color: #f0f0ff;
-webkit-appearance: none;
-webkit-touch-callout: none;
-webkit-tap-highlight-color: rgba(0,0,0,0);
-webkit-touch-callout: none; -webkit-user-select: none;
}
button {
margin: 15px;
-webkit-appearance:none;
font-size: 1.2em;
}
#mainPage {
text-align:center;
width: 100vw;
height: 100vh;
}
#detailPage {
text-align:center;
font-size: 2em;
width: 100vw;
height: 100vh;
background-color: red;
}
button {
-webkit-appearance: none;
font-size: 1.5em;
border-radius: 0;
}
#resultDiv {
font: 16px "Source Sans", helvetica, arial, sans-serif;
font-weight: 200;
display: block;
-webkit-border-radius: 6px;
width: 100%;
height: 140px;
text-align: left;
overflow: auto;
}
#mainPage.show{
display: block;
}
#mainPage.hide{
display: none;
}
#detailPage.show{
display: block;
}
#detailPage.hide{
display: none;
}
And ofcourse my JavaScript:
'use strict';
// ASCII only
function bytesToString(buffer) {
return String.fromCharCode.apply(null, new Uint8Array(buffer));
}
// ASCII only
function stringToBytes(string) {
var array = new Uint8Array(string.length);
for (var i = 0, l = string.length; i < l; i++) {
array[i] = string.charCodeAt(i);
}
return array.buffer;
}
// this is Nordic's UART service
var bluefruit = {
serviceUUID: '6e400001-b5a3-f393-e0a9-e50e24dcca9e',
txCharacteristic: '6e400002-b5a3-f393-e0a9-e50e24dcca9e', // transmit is from the phone's perspective
rxCharacteristic: '6e400003-b5a3-f393-e0a9-e50e24dcca9e' // receive is from the phone's perspective
};
var app = {
initialize: function() {
this.bindEvents();
detailPage.hidden = true;
//ale paginas hidden behalve login
},
bindEvents: function() {
document.addEventListener('deviceready', this.onDeviceReady, false);
refreshButton.addEventListener('touchstart', this.refreshDeviceList, false);
sendButton.addEventListener('click', this.sendData, false);
disconnectButton.addEventListener('touchstart', this.disconnect, false);
deviceList.addEventListener('touchstart', this.connect, false); // assume not scrolling
},
onDeviceReady: function() {
app.refreshDeviceList();
},
refreshDeviceList: function() {
deviceList.innerHTML = ''; // empties the list
if (cordova.platformId === 'android') { // Android filtering is broken
ble.scan([], 5, app.onDiscoverDevice, app.onError);
} else {
ble.scan([bluefruit.serviceUUID], 5, app.onDiscoverDevice, app.onError);
}
},
onDiscoverDevice: function(device) {
var listItem = document.createElement('li'),
html = '<b>' + device.name + '</b><br/>' +
'RSSI: ' + device.rssi + ' | ' +
device.id;
listItem.dataset.deviceId = device.id;
listItem.innerHTML = html;
deviceList.appendChild(listItem);
},
ulScroll: function() {
var ul = document.getElementById("deviceList");
var items = ul.getElementsByTagName("li");
for (var i = 0; i < items.length; i++) {
if ((items.textContent || items.innerText) == "TEST123"){
connect: function(e) {
var deviceId = e.target.dataset.deviceId,
onConnect = function(peripheral) {
app.determineWriteType(peripheral);
// subscribe for incoming data
ble.startNotification(deviceId, bluefruit.serviceUUID, bluefruit.rxCharacteristic, app.onData, app.onError);
sendButton.dataset.deviceId = deviceId;
disconnectButton.dataset.deviceId = deviceId;
resultDiv.innerHTML = "";
app.showDetailPage();
};
ble.connect(deviceId, onConnect, app.onError);
},
}
}
}
disconnect: function(event) {
var deviceId = event.target.dataset.deviceId;
ble.disconnect(deviceId, app.showMainPage, app.onError);
},
showMainPage: function() {
document.getElementById("mainPage").className = "show";
document.getElementById("detailPage").className = "hide";
},
showDetailPage: function() {
document.getElementById("detailPage").className = "show";
document.getElementById("mainPage").className = "hide";
},
onError: function(reason) {
alert("ERROR: " + reason);
}
};
P.S. Very sorry for the unorganized code
How i would structure the code:
var app={
devices:[], //thats were the devices are stored
onDeviceReady:refreshDeviceList,
refreshDeviceList: function() {
deviceList.innerHTML = ''; // empties the list
this.devices=[];
if (cordova.platformId === 'android') { // Android filtering is broken
ble.scan([], 5, app.onDiscoverDevice, app.onError);
} else {
ble.scan([bluefruit.serviceUUID], 5, app.onDiscoverDevice, app.onError);
}
//all devices checked, lets search ours:
var my=this.devices.find(device => { device.name=="TEST123"});
if(my){
ble.connect(my.id,app.onconnect,errorhandling);
}else{
alert("my device not found");
}
},
onDiscoverDevice: function(device) {
//add to html
var listItem = document.createElement('li'),
html = '<b>' + device.name + '</b><br/>' +
'RSSI: ' + device.rssi + ' | ' +
device.id;
listItem.innerHTML = html;
deviceList.appendChild(listItem);
//add to devices:
this.devices.push(device);
},
onconnect:function(e){
//your connect function
}
}
Additional notes:
refreshButton etc are undefined. You need to find them:
var refreshButton=document.getElementById("refreshButton");
So, what I am going to do with the input tag is to insert as many as email address inside it.
<input type="text" name="email-tags"/>
To make it more user-friendly, I want to highlight each-email which is typed inside it with blue color, it looks similar like a tag in SO question which also has x button to delete the tag.
Can anybody please help me how to do this with javascript?
Thanks in advance.
This block of code actually does what you need. It's pretty advanced. I hope it suits your needs. document.getElementById("test").value contains the email addresses in an array in this example.
function setInputEmailToExtendedInput()
{
var inputs = document.querySelectorAll("input[data-type='email']");
Array.prototype.slice.call(inputs).forEach(function(element){
var node = new emailInput();
if (element.id)
{
node.container.id = element.id;
}
if (element.className)
{
node.container.className = element.className;
}
element.parentElement.replaceChild(node.container, element);
});
}
function emailInput() {
this.container = document.createElement("div");
this.container.input = document.createElement("input");
this.container.input.type = "text";
this.container.style.overflowY = "auto";
this.container.input.className = "email_input";
this.container.appendChild(this.container.input);
this.container.input.addEventListener("keydown", checkKeyUpOnEmailInputDisable(this), false);
this.evaluateTag = evaluateEmailFunction;
this.deleteTag = deleteEmailFunction;
this.container.input.addEventListener("paste", emailEvaluateOnChange(this), false);
Object.defineProperty(this, "value", {
value: [],
enumerable: false
});
Object.defineProperty(this, "placeholder", {
get: function() {
this.container.input.placeholder;
},
set: function(value) {
this.container.input.placeholder = value;
},
enumerable: false
});
}
function emailEvaluateOnChange(obj, e) {
return function(e) {
obj.evaluateTag(e.target.value);
}
}
function checkKeyUpOnEmailInputDisable(obj, e) {
return function(e) {
if (e.keyCode == 13 || e.keyCode == 32) //either enter or space
{
obj.evaluateTag(e.target.value);
return false;
} else if (e.keyCode == 8) //backspace
{
if (e.target.value.length == 0 && obj.value.length > 0) //length of the input is zero.
{
//delete tag.
obj.deleteTag();
return true;
}
} else if (e.keyCode == 27) //escape
{
//hide the input helper and blur the input.
e.target.blur();
e.preventDefault();
return false;
}
};
}
function deleteEmailFunction(tag) {
if (!tag) {
//delete the last tag
var tag = this.value.length - 1;
}
this.container.removeChild(this.container.querySelectorAll(".email_element")[tag]);
this.value.splice(tag, 1);
if (this.value.length > 0) {
var marginNode = parseInt(getComputedStyle(this.container.children[0]).getPropertyValue("margin-right"));
var width = parseInt(this.container.children[0].offsetLeft) * 2; //default padding
for (var i = 0; i < this.value.length; ++i) {
//calculate the width of all tags.
width += parseInt(this.container.children[i].offsetWidth) + marginNode;
}
this.container.input.style.width = (this.container.offsetWidth - width) - 20 + "px";
} else {
this.container.input.style.width = "100%";
}
this.container.input.focus();
}
function createEmail(value) {
var node = document.createElement("span");
node.className = "email_element";
node.innerHTML = value;
return node;
}
function evaluateEmailFunction(tagValue) {
if (tagValue.match(/[a-z0-9!#$%&\'*+\/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&\'*+\/=?^_`{|}~-]+)*#(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?/ig)) {
//email is valid add
var node = createEmail(tagValue.trim());
this.container.insertBefore(node, this.container.input);
this.value.push(tagValue);
var marginNode = parseInt(getComputedStyle(node).getPropertyValue("margin-right"));
var width = parseInt(this.container.children[0].offsetLeft) * 2; //default padding
for (var i = 0; i < this.value.length; ++i) {
//calculate the width of all tags.
width += parseInt(this.container.children[i].offsetWidth) + marginNode;
}
//set the width of the tag input accordingly.
this.container.input.style.width = (this.container.offsetWidth - width) - 20 + "px";
this.container.input.value = "";
this.container.input.focus();
}
}
RegExp.escape = function(s) {
return s.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
};
window.addEventListener("load", function(){setInputEmailToExtendedInput()}, false);
div.email_builder {
width: 500px;
height: 36px;
background-color: #ffffff;
border: 1px solid #777777;
box-sizing: border-box;
}
input.email_input {
padding: 8px 8px 8px 8px;
border: 0px solid transparent;
width: 100%;
box-sizing: border-box;
font-size: 11pt;
}
span.email_element {
display: inline-block;
padding: 6px 2px 6px 2px;
margin-right: 4px;
color: #0059B3;
font-size: 10pt;
white-space: nowrap;
cursor: pointer;
box-sizing: border-box;
}
span.email_element > span.email_remove_button {
color: #000000;
font-size: 10pt;
white-space: nowrap;
cursor: pointer;
padding-left: 12px;
font-size: 14px;
font-weight: bold;
}
span.email_element > span.email_remove_button:hover {
color: #660000;
font-size: 10pt;
white-space: nowrap;
cursor: pointer;
padding-left: 12px;
font-size: 14px;
font-weight: bold;
}
<input type="text" class="email_builder" id="test" data-type="email" />
how about this:
<from id="form" action="">
<span id="emailInput">
<input type="text" name="email-tags"/>
</span>
<span id="test"></span>
</form>
function isValidEmail(email) {
var re = /^(([^<>()[\]\\.,;:\s#\"]+(\.[^<>()[\]\\.,;:\s#\"]+)*)|(\".+\"))#((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
return re.test(email);
}
$(function(){
$('input').keydown(function(event){
$input = $(this);
$emailInput = $("#emailInput");
$("#test").html(event.which);
switch(event.which){
//stop for "," ";" and " "
case 188:
case 186:
case 32:
currentEmail = $.trim($input.val());
if(isValidEmail(currentEmail)){
$address = $("<span>");
$address.addClass("emailAddress");
$address.text(currentEmail);
$close=$('<span>');
$close.addClass("close").text("x");
$address.append($close);
$input.val("");
$input.before($address);
}
}
});
$("#emailInput").on("click",".close",function(){
$(this).parent().remove();
});
});
see here:
http://fiddle.jshell.net/wryjde3z/