I’m working on a WP8 HTML5 Game and was trying to be responsive to the theme the user selected.
I know I can use the Background tag in the CSS
body {
font-size: 11pt;
font-family: "Segoe WP";
letter-spacing: 0.02em;
background-color: Background;
color: #FFFFFF;
margin-
}
So now the background changes from Black to White but not the text color, obviously due to my having it set to #FFFFFF
I tried to change it in the javascript but oddly enough when I try document.body.style.backgroundcolor it returns “” and even using a variable set by HEX or RGB returns false.
Anyone have a solution to this?
MainPage.xaml.cs
private void Browser_Loaded(object sender, RoutedEventArgs e)
{
Browser.IsScriptEnabled = true;
// Add your URL here
Browser.Navigate(new Uri(MainUri, UriKind.Relative));
Browser.Navigated += (o, s) => {
string theme = ((Visibility)Application.Current.Resources["PhoneLightThemeVisibility"] == Visibility.Visible) ?
"light" : "dark";
Browser.InvokeScript("eval", String.Format("document.body.className += ' {0}'", theme));
};
}
phone.css
body {
font-size: 11pt;
font-family: "Segoe WP";
letter-spacing: 0.02em;
background-color: Background;
margin-left: 24px;
}
.light {
color: #000000;
}
.dark {
color: #FFFFFF;
}
document.body.style.backgroundcolor is misspelled ...
Try: document.body.style.backgroundColor
With Uppercased C.
To change te color text of the body you can use document.body.style.color
EDIT:
By the way, probably there is a better way to solve your problem, if you are going to change a lot of css properties, you should create css classes, like this:
body {
/* default body css */
}
.myFirstColorSet {
background-color: #FFF;
color: #000;
...
}
.mySecondColorSet {
background-color: #000;
color: #FFF;
...
}
And then with javascript, just switch the body class
document.body.className = "mySecondColorSet";
Here is the fiddle with this example: http://jsfiddle.net/promatik/K75TG/
While the above XAML works so does this simply jQuery script
<script>
if ($("body").css("background-color") == 'rgb(0, 0, 0)'){
$("body").css("color","rgb(255, 255, 255)");
}
else{
$("body").css("color","rgb(0, 0, 0)");
}
</script>
Related
I have the following CSS for a button:
.btn {
background-color:#0d0d0d;
color: #00b0f0;
border: .74px solid currentcolor;
font-size: 16px;
padding: 16px 32px;
cursor: pointer;
}
.btn:hover {
background-color: #00b0f0;
color: #0d0d0d;
}
.btn:active {
background-color: #00b0f0;
box-shadow: 0 5px #666;
transform: translateY(4px);
}
I also have this color input eyedropper tool in my HTML:
<input type="color" id="s0r4c52" value="#00b0f0" style="border:none;">
Finally, I have this function I found on the internet that allows me to style CSS selectors with any color input that I choose.
let picker1;
const defaultColor = "#00b0f0";
window.addEventListener("load", startup, false);
function startup() {
picker1 = document.querySelector("#s0r4c52");
picker1.value = defaultColor;
picker1.addEventListener("input", updateFirst, false);
picker1.addEventListener("change", updateAll, false);
picker1.select();
}
function updateFirst(event) {
const p = document.querySelector("td,input,select,.ce31,.slider,.nav li,.nav,.nav li a,.btn");
if (p) {
p.style.color = event.target.value;
}
}
function updateAll(event) {
document.querySelectorAll("td,input,select,.ce31,.slider,.nav li,.nav,.nav li a,.btn").forEach((p) => {
p.style.color = event.target.value;
});
}
My question is how do I style the :hover and :active background of the button with the color picker. I want the button to have black (#0d0d0d) text when hovered and clicked, but have the button background change color to whatever I choose with the color picker.
I have found all these codes on the internet and through many hours of trial have gotten it to work for styling at least some CSS selectors. Is there a more efficient way to do all of this??
I have This simple website that i need to make it change from light theme to dark theme, the light theme works fine, but the dark theme only changes its button properly because when i click in the button to change the "body" elements should change its class from "light-theme" to "dark-theme", instead it changes to "light-theme dark-theme"
here's HTML
`
<body class="light-theme">
<h1>Task List</h1>
<p id="msg">Current tasks:</p>
<ul>
<li class="list">Add visual styles</li>
<li class="list">add light and dark themes</li>
<li>Enable switching the theme</li>
</ul>
<div>
<button class="btn">Dark</button>
</div>
<script src="app.js"></script>
<noscript>You need to enable JavaScript to view the full site</noscript>
Heres CSS
:root {
--green: #00FF00;
--white: #FFFFFF;
--black: #000000;
}
.btn {
position: absolute;
top: 20px;
left: 250px;
height: 50px;
width: 50px;
border-radius: 50%;
border: none;
color: var(--btnFontColor);
background-color: var(--btnBg);
}
.btn:focus {
outline-style: none;
}
body {
background: var(--bg);
}
ul {
font-family: helvetica;
}
li {
list-style: circle;
}
.list {
list-style: square;
}
.light-theme {
--bg: var(--green);
--fontColor: var(--black);
--btnBg: var(--black);
--btnFontColor: var(--white);
}
.dark-theme{
--bg: var(--black);
--fontColor: var(--green);
--btnBg: var(--white);
--btnFontColor: var(--black);
}
and heres JavaScript
'use strict';
const switcher = document.querySelector('.btn');
switcher.addEventListener('click', function () {
document.body.classList.toggle('dark-theme')
var className = document.body.className;
if(className == "light-theme") {
this.textContent = "Dark";
} else {
this.textContent = "Light";
}
console.log('current class name: ' + className);
});
`
I tried to change some things in css but later found that the problem might be in the javascript, but my code is exactly as the code in my course is.
when i click in the button to change the "body" elements should change its class from "light-theme" to "dark-theme", instead it changes to "light-theme dark-theme"
That's indeed true - your JS code is only toggling the class "dark-theme" and does nothing with the "light-theme" class.
So a simple fix would be to toggle both classes:
switcher.addEventListener('click', function () {
document.body.classList.toggle('dark-theme')
document.body.classList.toggle('light-theme'); // add this line
var className = document.body.className;
if(className == "light-theme") {
this.textContent = "Dark";
} else {
this.textContent = "Light";
}
console.log('current class name: ' + className);
});
But you could simplify your code because you really don't need 2 classes here. If light theme is the default, just remove the light-theme class and all its CSS rules, and apply those to body instead. The .dark-theme rules will override these when the class is set, but not otherwise.
This question already has answers here:
What do querySelectorAll and getElementsBy* methods return?
(12 answers)
Closed 2 years ago.
my code works fine I just need to switch between two colors white and black I need help to modify the JavaScript code to turn switch between white and black colors.
-CSS
<style>
h1 {
color: green;
}
/* toggle in label designing */
.toggle {
float: none;
position : fixed ;
display : inline-block;
width: 80px;
height: 38px;
background-color: grey;
border-radius: 30px;
border: 2px solid white;
top: 6px;
left: 896px;
}
/* After slide changes */
.toggle:after {
content: '';
position: absolute;
width: 38px;
height: 35px;
border-radius: 50%;
background-color: white;
top: -1px;
left: 0px;
transition: all 0.5s;
}
/* Toggle text */
p {
font-family: Arial, Helvetica, sans-serif;
font-weight: bold;
}
/* Checkbox cheked effect */
.checkbox:checked + .toggle::after {
left : 38px;
}
/* Checkbox cheked toggle label bg color */
.checkbox:checked + .toggle {
background-color: #5ad94d;
}
/* Checkbox vanished */
.checkbox {
display : none;
}
</style>
-HTML
<input class='checkbox' id='switch' type='checkbox'/>
<label class='toggle' for='switch'>
<p>ON OFF</p>
</label>
-Javascript
<script>
document.getElementById("switch").addEventListener('click', function(){
document.getElementsByClassName("mainWrapper fullWidth")[0].style.backgroundColor = document.getElementById("switch").toggle ? "white" : "black";
});
</script>
again
my code works fine I just need to switch between two colors white and black I need help to modify the JavaScript code to turn switch between white and black colors.
any ideas ??? thank!
getElementsByClassName() returns an html collection object. It is a collection. If you want to find the first element with the class, you need to use the index [0] like below -
document.getElementById("tog-bg").addEventListener('click', function(){
document.getElementsByClassName("mainWrapper")[0].style.backgroundColor = document.getElementById("tog-bg").checked ? "white" : "black";
});
If you want to do this for all elements with the specified class, then you can loop it like below -
document.getElementById("tog-bg").addEventListener('click', function(){
for(let i = 0; i < document.getElementsByClassName("mainWrapper").length; i++){
document.getElementsByClassName("mainWrapper")[i].style.backgroundColor = document.getElementById("tog-bg").checked ? "white" : "black";
}
});
I am using the ternary operator instead of if else condition in the above snippet. Also, I have replaced the change event with click event in the listener.
getElementByClassName returns collection
So code should be
//add [0] to both getElementByClassName
document.getElementsByClassName("mainWrapper")[0].style.backgroundColor
Also there isn't any class mainWrapper here so you should create a parent div with class mainWrapper
This worked for me in firefox (not styled, but functional) :
document.getElementById("tog-bg").onclick = function(){
var e;
if( (e = document.getElementById("tog-bg")).hasAttribute('checked')) {
var w = document.getElementsByClassName("mainWrapper ");
for(i=0;i<w.length;++i)
{
w[i].style.backgroundColor = "black";
}
e.removeAttribute('checked');
} else {
var w = document.getElementsByClassName("mainWrapper ");
for(i=0;i<w.length;++i)
{
w[i].style.backgroundColor = "white";
}
e.setAttribute('checked','');
}
};
I am trying to change the background colour of a div based on it's current colour, via the click of a button.
For example, if the colour is cyan (#00ffff - it should change to yellow ('ffff00).
If the colour is yellow - it should change to magenta (#ff00ff).
If the colour is magenta - it should revert back to cyan.
I have managed to change the color to yellow from cyan, however I am not sure exactly how to write my if statement (assuming an if statement is the best way?) to change the colours based on the current colour.
function ColorFunction() {
if (light.getItem("backgroundColor") == '#00ffff') {
document.getElementById("light").style.backgroundColor = "#ffff00";
}
else
if (light.getItem("backgroundColor") == '#ffff00') {
document.getElementById("light").style.backgroundColor = "#ff00ff";
}
else
if (light.getItem("backgroundColor") == '#ff00ff') {
document.getElementById("light").style.backgroundColor = "00ffff";
}
}
.main {
width:250px;
color: #202020;
background-color: #d0d0d0;
}
.light {
width: 50px;
height: 50px;
background-color: #00ffff
}
#burn {
width: 150px;
font-style: italic;
}
#button {
font-style: bold;
width: 150px;
}
<h1>Disco Inferno</h1>
<div class="light" id="light">
div
</div>
<button onClick="ColorFunction()">Burn!</button>
Ok, lets start at the beginning here.
You have an element with the id light but that does not automatically become a variable you can use in javascript. Its easy enough to make it one:
var light = document.getElementById("light");
Then, i'm not even sure where you get getItem from - perhaps it was a guess - but its not a valid method on an HTMLElement
You could do this with light.style.backgroundColor - see the snippet below.
var colors = ["rgb(0, 255, 255)","rgb(255, 255, 0)","rgb(255, 0, 255)"];
function ColorFunction() {
var light = document.getElementById("light");
var curr = light.style.backgroundColor;
var next = colors.indexOf(curr)+1;
light.style.backgroundColor = colors[next%colors.length];
}
<h1>Disco Inferno</h1>
<div class="light" id="light" style="background-color:#00FFFF">
Burn, baby burn!
</div>
<button onClick="ColorFunction()">Burn!</button>
You could use an object for shifting the colors, after assigning directly a color to the div.
function ColorFunction() {
var colors = {
'rgb(0, 255, 255)': 'rgb(255, 255, 0)',
'rgb(255, 255, 0)': 'rgb(255, 0, 255)',
'rgb(255, 0, 255)': 'rgb(0, 255, 255)'
},
element = document.getElementById("light");
element.style.backgroundColor = colors[element.style.backgroundColor];
}
.main { width:250px; color: #202020; background-color: #d0d0d0; }
.light { width: 50px; height: 50px; background-color: #00ffff; }
#burn { width: 150px; font-style: italic; }
#button { font-style: bold; width: 150px; }
<div class="light" id="light" style="background-color: #00ffff;"></div>
<button onClick="ColorFunction()">Burn!</button>
There is no getItem() that is some made up method. Look at the console and you will see that it is an error. To read background color you should be using style.
var color = elementReference.style.backgroundColor
Now you are relying on a bad feature of JavaScript where you define a variable that matches an id of an element and it is magically a reference to that element.You should not do that. You should define the variable yourself.
var elementReference = document.getElementById("light");
Now the kicker, browsers returning different things when you read color values. SOme hex, some rgb. So checking for color is a bad thing to do. What to do? Use CSS classes.
function ColorFunction(){
var elem = document.getElementById("light");
if(elem.classList.contains("red")) {
elem.classList.remove("red");
elem.classList.add("blue");
} else if(elem.classList.contains("blue")) {
elem.classList.remove("blue");
elem.classList.add("green");
} else {
elem.classList.remove("green");
elem.classList.add("red");
}
}
.red { background-color: red;}
.blue {background-color: blue;}
.green {background-color: green;}
<h1>Disco Inferno</h1>
<div class="light red" id="light">
div
</div>
<button onClick="ColorFunction()">Burn!</button>
Now there are other ways to do the if check with add/remove, but that is the basic idea.
I have written a script to add a Pinterest button to most images on my site. The issue is that when someone has the Chrome Pin it extension enabled in their browser, the "pin it" button shows up twice for the user.
Is there anyway, in JavaScript, to check if the user has this extension enabled in their browser?
(function($) {
$(function() {
$('.container img').each(function() {
if ($(this).parent('a')) {
var $permalink = $(this).parent('a').attr('href');
}
else {
var $permalink = $(location).attr('href');
}
var $permalink = $(location).attr('href'),
$title = $('h1.product_name').text() || $('h2.header');
var $linkhtml = $('<a/>', {
'class':'pin-it-button pinme',
'html': '<img src="//assets.pinterest.com/images/pidgets/pinit_fg_en_rect_gray_20.png" />',
'count-layout': 'horizontal',
'style': 'cursor:pointer; position:absolute; bottom:30px; left:0; border:0 none; opacity: 0.4;',
'href': 'http://pinterest.com/pin/create/button/?url=' + $permalink + '&media=' + $(this).attr('src') + '&description=' + $title
});
if ($(this).parent('a')) {
$(this).addClass('pinme').parent('a').after($linkhtml);
}
else {
$(this).addClass('pinme').after($linkhtml);
}
$('.pinme').hover(
function() {
if ($(this).hasClass('pin-it-button')) {
console.log('hello');
$(this).css('opacity', '1');
}
else {
$(this).parent().siblings('.pin-it-button').css('opacity', '1');
}
}, function() {
if ($(this).hasClass('pin-it-button')) {
$(this).css('opacity', '0.4');
}
else {
$(this).parent().siblings('.pin-it-button').css('opacity', '0.4');
}
}
);
});
});
})(jQuery);
The new Pinterest extension (2017)
injects a <span> hover button directly under <body:
<span style="border-radius: 3px;
text-indent: 20px;
width: auto;
padding: 0px 4px 0px 0px;
text-align: center;
font-style: normal;
font-variant: normal;
font-weight: bold;
font-stretch: normal;
font-size: 11px;
line-height: 20px;
font-family: "Helvetica Neue", Helvetica, sans-serif;
color: rgb(255, 255, 255);
background: url("data:image/svg+xml;base64,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") 3px 50% / 14px 14px no-repeat rgb(189, 8, 28);
position: absolute;
opacity: 1;
z-index: 8675309;
display: none;
cursor: pointer;
border: none;
-webkit-font-smoothing: antialiased;
top: 240px;
left: 110px;
">Save</span>
So a simple check would be:
var pin = document.querySelector('body > span[style*="8675309"][style*="rgb(189, 8, 28)"]')
Or you can check for the entire background base64 string which contains the P logo.
Old answer for the old PinIt extension:
Examining a page with Pin It extension installed we can see that it adds its own attribute to <body>:
<body data-pinterest-extension-installed="cr1.39.1">
It's easy to determine the presence of the attribute in js:
if (document.body.dataset.pinterestExtensionInstalled) {
console.log("Pin It extension detected!");
}
Note that the attribute is added after the page has been loaded so you can't check it right in DOMContentLoaded event handler; make a pause with setInterval or use MutationObserver:
Content script with "run_at": "document_end" or "document_idle" (the default mode):
var PinItInstalled = undefined;
new MutationObserver(function(mutations) {
PinItInstalled = document.body.dataset.pinterestExtensionInstalled;
this.disconnect();
}).observe(document.body, {
attributes: true,
attributeFilter: ["data-pinterest-extension-installed"]
});
Content script with "run_at": "document_start":
var PinItInstalled = undefined;
document.addEventListener("DOMContentLoaded", function() {
new MutationObserver(function(mutations) {
PinItInstalled = document.body.dataset.pinterestExtensionInstalled;
this.disconnect();
}).observe(document.body, {
attributes: true,
attributeFilter: ["data-pinterest-extension-installed"]
});
});
P.S. Don't forget to test what happens if the Pin It extension's option to show its button on hover is disabled.
While detecting the presence of the extension or pinit.js on the page may be worthwhile, the easier solution is to simply add the data-pin-no-hover attribute to your images. This will tell the extension to ignore the images.
<img src="whatevz" data-pin-no-hover="true" />
There really isn't any reason to care if it is installed or not if the data-pin attribute is set.
The other option is to not create your own hover buttons, but use pinit.js that creates the hover buttons for you. See the docs.
<script
type="text/javascript"
async defer
data-pin-hover="true"
src="//assets.pinterest.com/js/pinit.js"
></script>