I made a simple application using the code from this and ran it to test it on the worker sandbox MTurk site. It works perfectly when using the code shown in the answer, but if I try to create an object and place the function and variables in the object, the buttons won't work on the sandbox site but will work when opening the .html file in a browser. Additionally, adding comments will produce the same effect. The code I have is this:
<?xml version="1.0"?>
<HTMLQuestion xmlns="http://mechanicalturk.amazonaws.com/AWSMechanicalTurkDataSchemas/2011-11-11/HTMLQuestion.xsd">
<HTMLContent><![CDATA[
<!DOCTYPE html>
<html>
<head>
<style>
#thediv {
align-self:flex-start
margin:0 auto;
height:1050px;
width:750px;
overflow:auto;
}
img {
position: static;
left: 50%;
top: 50%;
}
</style>
</head>
<body>
<input type='button' value ='-' onclick='zoom(0.5);'/>
<input type='button' value ='+' onclick='zoom(2);'/>
<div id="thediv">
<img id="pic" src="http://upload.wikimedia.org/wikipedia/commons/d/de/Nokota_Horses_cropped.jpg"/>
</div>
<script type="text/javascript">
var zoomLevel=1;
var maxZoomLevel=2;
var minZoomLevel=1;
function zoom(zm) {
var img=document.getElementById("pic");
if(zm > 1){
if(zoomLevel < maxZoomLevel){
zoomLevel++;
}else{
return;
}
}else if(zm < 1){
if(zoomLevel > minZoomLevel){
zoomLevel--;
}else{
return;
}
}
wid = img.width;
ht = img.height;
img.style.width = (wid*zm)+"px";
img.style.height = (ht*zm)+"px";
}
</script>
</body>
</html>
]]>
</HTMLContent>
<FrameHeight>450</FrameHeight>
</HTMLQuestion>
Is there a reason certain things will work in browser but not in the MTurk sandbox site?
I just tested creating a HIT like this and it worked for me.
Unrelated to the JavaScript, note that you will need to include at least one named input (eg ) in order for Workers to submit the HIT.
What browser are you testing in?
Related
I have this simple code to save html as image:
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<script src="js/jquery.js"></script>
<script src="js/html2canvas.js"></script>
<script src="js/canvas2image.js"></script>
<script>
$('#save').click(function () {
var elem = $('#element').get(0);
var leba = "600";
var ting = "400";
var type = "bmp";
var name = "temp"
html2canvas(elem).then(function (canvas) {
var cWidth = canvas.width;
var cHeight = canvas.height;
var img = Canvas2Image.convertToImage(canvas, cWidth, cHeight);
$('#preview').after(img);
Canvas2Image.saveAsImage(canvas, leba, ting, type, name);
})
})
</script>
<div id="element"
style="width: 600px; height: 450px; background-color: aquamarine; margin: 30px auto; text-align: center">
<h1>Screenshot</h1>
<input type="text" style="background-color: aliceblue; border: 1px solid #aaaaaa; color: #333333">
</div>
<div style="text-align: center">
<button id="save">Salva</button>
<p id="preview"></p>
</div>
</body>
</html>
I want to have a preview of the screenshot and save it on click, but when I click nothing happens.
The three files containing the three scripts are correctly loaded, I'm using visual studio code and the links are correct, but despite the attempts, I can't get the image.
I also tried to put the js links directly, but without success, I moved the scripts directly into the HTML tag (I know it's useless), but my page doesn't give any results.
For saving the canvas as image you can go through the below change. I dont think so, that you need a library to save the file.
html2canvas(document.querySelector("#element")).then(function (canvas) {
var dataURL = canvas.toDataURL("image/jpeg", 1.0);
var a = document.createElement('a');
a.href = dataURL;
a.download = 'untitled.jpeg';
document.body.appendChild(a);
a.click();
})
And for the complete reference you can visit the CodePen link added below
https://codepen.io/mukeshmohan/pen/ymvQjV
And its recommended to wrap your code inside a document ready.
$( document ).ready(function() {
// your script goes here
});
which will make the jquery to wait till the dom rendering completes, that allows a safe and clean event handling.
You need to wrap your code in a
$( document ).ready()
block
Take a look here
I have a project where I am creating a spinner page but I am having difficulty integrating the spinner page while I am redirecting to a URL. Basically I have a multiplication program. If the answer is correct it prompts correct and goes to a specific URL(http://stackoverflow.com) and if is incorrect it goes to another URL(http://yahoo.com). Before it actually goes to those pages I would like the spinner that I created to show up first while the pages are loading. Can someone help me with this? Thanks in advance.
Here is my main HTML page(index1.html):
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" type="text/css" href="stylesheet.css">
<script
src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js">
</script>
<meta charset="ISO-8859-1">
<title>A Multiplication Game</title>
</head>
**<script>
window.addEventListener("loader", function(){
var spinner=document.getElementById("spinner");
document.body.removeChild(load_screen);
});
</script>**
<body >
<span id="mathprompt">What is <span id="num1">8</span> multiplied by
<span id="num2">E</span>?
</span>
<br>
<span id="inputrow">
<input type="text" id="inputfield">
<button id="submitbutton">Submit</button>
</span>
**<div class="loader" id="spinner"></div>**
<p id="response"></p>
<script src="script.js" type="text/javascript"></script>
</body>
</html>
Here is my JavaScript code(script.js). As you can see I have declared spinner as a variable but not sure if I should right the function for it here or in HTML:
var num1;
var num2;
var guess;
var answer;
var response;
$(document).ready(function() {
num1=document.getElementById("num1");
num2=document.getElementById("num2");
guess=document.getElementById("inputfield");
response=document.getElementById("response");
**spinner=document.getElementById("spinner");**
$("#submitbutton").click(function(){
checkAnswer();
redirectPage();
});
setNumbers();
});
function setNumbers(){
num1.innerHTML = Math.floor(Math.random() * 10)+1;
num2.innerHTML = Math.floor(Math.random() * 10)+1;
}
function checkAnswer(){
var n1 = parseInt(num1.innerHTML);
var n2 = parseInt(num2.innerHTML);
answer = n1 * n2;
if (parseInt(guess.value) == answer){
response.innerHTML = "Correct!";
} else
response.innerHTML = "Incorrect!";
}
function redirectPage(){
if (parseInt(guess.value) == answer){
window.location.href = "http://stackoverflow.com";
} else{
window.location.href = "http://yahoo.com";
}
}
And here is the code for the spinner in the css(stylesheet.css):
#charset "ISO-8859-1";
#inputrow{
background-color:#80ff80;
}
#mathprompt{
font-size: 34px;
color:orange;
text-align: center;
}
#response{
font-size: 34px;
color:white;
text-align: center;
}
body {
background-color: #8080c0;
text-align: center;
}
**.loader{
border:16px solid #f3f3f3;
border-radius: 50%;
border-top: 16px solid #3498db;
width: 240px;
height: 240px;
animation: spin 2s linear infinite;
margin-left: auto;
margin-right: auto;
text-align:center;
}
#keyframes spin {
0% { transform: rotate(0deg); }
100% { transform: rotate(360deg); }
}**
You seem to want to detect that an external website is loaded...you cannot detect this, in Javascript you won't have access to the "loaded" event of an external website loaded in a new tab of your browser.
All your can do is display a loading, then doing a "redirect" in javascript.
And when yahoo/stackoverflow page will be loaded (having replaced your website in the browser tab), your loader will obviously have disappeared...is it what you want ?
You have 3 cases :
If you load yahoo/stackoverflow in an iframe embedded in your page, yes you could display a loading and detect that the page is loaded in your iframe (for instance you load a page of your own in the iframe, you can in JS access to the page's content...you load Yahoo/Stackoverflow in the iframe, then when in JS you cannot access to iframe content, it means that the external page is loaded...)
if you are redirecting to the yahoo/stackoverflow page, you will only be able to display a loading before the external pages are beginning to load...
you can try to prefetch the external page, you display a loading, and when the page is loaded, then you redirect to the page...your browser will have cached almost all html elements i think (to check)...
var myPrefetchedPage;
$.ajax({
url: "test.html",
cache: false,
success: function(html){
myPrefetchedPage = html;
}
})
Preloading code in an iframe :
jQuery(document).ready(function ($) {
$app = $('.app');
$app.addClass('loading');
$iframe = $('<iframe>');
$iframe.attr({src: 'http://www.yahoo.fr/'});
$iframe.appendTo($('body'));
// When <iframe> has been loaded, remove loading spinner to reveal <iframe>
// or redirect to the page in your browser tab.
$iframe.load(function() {
$('.app').remove();
// redirect to the real page
window.location.href='http://www.yahoo.fr/';
});
});
So... this is weird?! when i try and use an ACE editor in google chrome in the following context:
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>
<style>
body {
background-color: rgb(0, 0, 0);
}
.preview {
position: fixed;
margin: 0 auto;
width:800px;
height:600px;
background-color:#3D3D3D;
}
#code {
width:800px;
height:600px;
position: fixed;
margin: 0 auto;
}
</style>
</head>
<body>
<div class="preview" id="preview_layer_1" style="z-index:0;">
nothing much yet
</div>
<div class="preview" id="preview_layer_2" style="z-index:1; background-color:;">
</div>
<div id="code" style="z-index:2;"></div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/ace/1.2.3/ace.js" type="text/javascript" charset="utf-8"></script>
<script>
$(document).ready(function(){
$("#code").hide();
$(".preview").dblclick(function(){
$("#code").fadeIn();
})
$("#code").dblclick(function(){
$("#code").fadeOut();
})
});
var Editor = ace.edit("code");
var Haxe = ace.createEditSession("","ace/mode/haxe");
var JSON = ace.createEditSession("","ace/mode/json");
Editor.setTheme("ace/theme/monokai");
Editor.setSession(Haxe);
Editor.focus();
</script>
</body>
so like any sane person i go to chrome dev tools to check whats going on and then suddenly it works!
so i reload it repeat the steps without opening devtools and then wait...
but nothing happens! and i don't know where to start the code looks fine to me but i'm sure its just a dumb error that i've made, right?
Thanks in advance
You need to call Editor.resize() when changing position or display of the editor container element, to allow the editor to adapt to the size changes.
It works when opening chrome devtools, because window size changes, and that calls the resize() method.
The following should work:
$(".preview").dblclick(function(){
$("#code").fadeIn();
Editor.resize();
})
This is my first post on SO and my first time making a Chrome Extension. I've read alot of documentation, but I am still unsure how to get this to work. Below are my html and js files. I want to be able to type something in the source box and have the have the word print out in the results area in real time. I have tested this code on my local host so i know it works, but for some reason it is acting up as a chrome extension.
popup.html
<!doctype html>
<html>
<head>
<title>Getting Started Extension Popup</title>
<style>
body {
min-width: 357px;
overflow-x: hidden;
}
img {
margin: 5px;
border: 2px solid black;
vertical-align: middle;
width: 75px;
height: 75px;
}
</style>
<script src="popup.js"></script>
</head>
<body>
<textarea id="source"></textarea>
<div id="result">
</div>
</body>
</html>
Here's the js:
function main() {
document.getElementById('source').keydown(function() {
var source = document.getElementById('source').value;
var outputValue = source.replace(/command/gi, "⌘")
.replace(/tab/gi, "⇥")
.replace(/return/gi, "⏎")
.replace(/option/gi, "⌥")
.replace(/control/gi, "⌃")
.replace(/esc/gi, "⎋")
.replace(/left/gi, "←")
.replace(/down/gi, "↓")
.replace(/up/gi, "↑")
.replace(/right/gi, "→")
.replace(/shift/gi, "⇧")
.replace(/eject/gi, "⏏")
.replace(/caps\s\(lock\)/gi, "⇪")
.replace(/save/gi, "⌘ + S")
.replace(/print/gi, "⌘ + P")
.replace(/find/gi, "⌘ + F");
document.getElementById("result").innerHTML = outputValue;
}
}
1) What wOxxOm said in the comment: element.keydown(function() { ... }) does not exist. This definitely comes from some jQuery code - you could use that if you add it to your extension, or you could use addEventListener.
2) You declare a function main(), but nothing ever calls it. A good place to call it would be a DOMContentLoaded event listener on document:
document.addEventListener("DOMContentLoaded", main);
function main() {
/* ... */
}
I'm starting to learn HTML5+CSS+JS. It was all going fine on my Windows desktop, but when I try doing something on my Linux notebook, no javascript seems to work.
This is the mini tutorial I followed: https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_Started/JavaScript
and this is my page with the result: http://www.lele.bbt.net.ar/prueba01/
(As you can see, the JS is not doing a thing).
// JavaScript demonstration
var changeBg = function(event) {
console.log("method called");
var me = event.target,
square = document.getElementById("square");
square.style.backgroundColor = "#ffaa44";
me.setAttribute("disabled", "disabled");
setTimeout(function() {
clearDemo(me)
}, 2000);
}
function clearDemo(button) {
var square = document.getElementById("square");
square.style.backgroundColor = "transparent";
button.removeAttribute("disabled");
}
var button = document.querySelector("button");
button.addEventListener("click", changeBg);
console.log(button);
#square {
width: 120px;
height: 120px;
border: 2px inset gray;
margin-bottom: 1em;
}
button {
padding: .5em 2em;
}
<!DOCTYPE html>
<html>
<head>
<title>Mozilla CSS Getting Started - JavaScript demonstration</title>
<link rel="stylesheet" type="text/css" href="style.css" />
<script type="text/javascript" src="script.js"></script>
</head>
<body>
<h1>JavaScript sample</h1>
<div id="square"></div>
<button>Click Me</button>
</body>
</html>
(Here it works, but for some reason, not when I do it on my computer).
I don't know if it can be a priviledge problem or something like that (js has read/write priviledges, not execute. But I guess that's how it should be)
Thanks!
I'm pretty sure it's because the script can't find the button.
You load your script before everything else is loaded, which is fine. But you can have problems like this. To avoid this kind of problems you load the JavaScript file after the HTML.
At the moment if you try to print the var "button" you will receive "null".
The Chrome console when you open the page gives you this error:
Uncaught TypeError: Cannot read property 'addEventListener' of null
That means that it is trying to read the property of the button, which is null.
Move the script tag to the very end, just before the closing </body> tag:
<body>
<h1>JavaScript sample</h1>
<div id="square"></div>
<button>Click Me</button>
<script type="text/javascript" src="script.js"></script>
</body>