I've been using Polymer for a website redesign. I want to display an image that is bound to an element as a background-image. A fairly simple task, but unfortunately I'm having some issues.
I made a running sample of the code for easy testing: click me.
<polymer-element name="album-card" attributes="image">
<template>
<style>
:host{
display: block;
position: relative;
background-color: #99182c;
width: 200px;
}
.description{
padding: 10px;
color: white;
}
.circular{
width: 200px;
height: 200px;
background: url({{image}}) no-repeat;
background-color:green;
}
</style><link rel="stylesheet" href="default_styles.css">
<paper-shadow z="{{shadowValue}}" animated="true"></paper-shadow>
<div class="album-header" vertical layout>
<paper-ripple class="recenteringTouch" fit></paper-ripple>
<div class="circular">
<!--<img src="{{image}}" />--><!-- this does work -->
</div>
<div class="description">
<content select="h2"></content>
<content select="h4"></content>
</div>
</div>
</template>
<script>
Polymer('album-card');
</script>
</polymer-element>
The issue is in the css styling. For some reason the image doesn't diplay in the following line: background: url({{image}}) no-repeat;. However, when using {{image}} in the body somewhere else (in the <div class="circular">, the image does display.
Replacing the {{image}} inside the styling with the direct link also works.
What am I doing wrong?
This looks like a bug. The {{}} are being interrupted literally instead of being parsed by the template engine. Replacing them with [[]] one time bindings works: http://jsbin.com/yocokire/4/edit
However, you should avoi using data-binding inside of <style> if possible (see https://github.com/Polymer/polymer/issues/270#issuecomment-24683309). There are perforamnce concerns and issues under the polyfill. Instead, use a style attribute on the element and do your binding there: http://jsbin.com/riqizige/1/edit
Related
I am using quill editor. and storing the data inside MySQL DB along with the HTML tag.
Example:
<p>heading<p><p><img src=""></p>
Now as I am using angular I have used below code reproduce the same HTML structure which I have saved earlier in DB.
<div class="container-fluid">
<h3 class="fancyFont">Hot Posts</h3>
<div class="row justify-content-md-center">
<div class="col-md" style="width: 100%">
<div style="background:lightgray;">
<div *ngFor="let post of allPosts">
<p [innerHTML]=post.postContent></p>
</div>
</div>
</div>
</div>
</div>
and to give it a proper style I have used the CSS below
p img{
max-width: 100% !important;
}
p {
margin: auto;
padding: 16px;
max-width:100%;
display: inline block;
word-break: break-all
}
But despite doing this I cannot resize or fit my image inside the p tag. To describe innerHtml I can say it will look like this in plain HTML
if you have 2 posts in allposts
[![<div>
<p><p><h1>first post</h1></p></p>
<p><p><h1>Second post</h1><p><p>image</p><p>
<div>][1]][1]
Maybe p inside p tag invalid for HTML 5 and I agree with that. As few members already gave me proof and I also checked it by myself. But in the case of Angular when you use innerHTML like
<p [innerHTML]=post.postContent></p>
It doesn't even matter (Yes I checked my web dev tools and it is working perfectly fine). So the question arises why I was not able to add style to my image tag by using
p img{
max-width:100% !important;
}
p {
max-width:100%;
word-break: break-all
}
because for innerHTML content angular doesn't support that until and unless you add below code in your component.ts file
encapsulation: ViewEncapsulation.None,
I am using single CSS file for all my pages, but I come across with this problem. I have an almost identical (with minor differences) element on two different pages ( let's say home page and about page; This is my CSS codes for a specific element in the Home page, I want to use this for another page with minor differences. How do I name those two classes,
Do I need to use completely separate class names like .home.topcontainer { and .about.topcontainer { etc, or is there any robust way handling this issue?
What is the best way of naming CSS blocks for different pages, if I am using a single CSS file for my whole website to avoid me get confused over class names?
Thanks
CSS
.top_container {
position:relative;
top:3px;
height:144px;
z-index:1;
background-color: #143952;
width: 90%;
left:5%;
right:5%;
font-family: 'Scope One', serif;
overflow:hidden;
min-width:900px;
The best practice is to add some relevant class in body tag (as you can see in several CMS like magento etc.) and then use like this:
<body class="home">
<div class="top_container">
<!-- Do something -->
</div>
</body>
--or--
<body class="about">
<div class="top_container">
<!-- Do something -->
</div>
</body>
now you can use css like:
.home .top_container{}
.about .top_container{}
Let's assume this is your Home page
<div id="home">
<div class="top_container">
//stuff
</div>
</div>
And this is your about page:
<div id="about">
<div class="top_container top_container_about">
//stuff
</div>
</div>
Now, in your CSS file, add the style for the 'top_container' class like so:
.top_container {
//css styles common to the top_container element
}
And then write the style that's unique to the top_container in the about section:
.top_container_about {
//css style unique to the about section
}
This is one way which takes advantage of the 'Cascading' property of a 'Cascading Style Sheet'.
Commonly used practice here is to use a base class and a variation to that base class. That way we use the base css-class for both elements and change it a little by overwriting some values with the variant-class. You didn't specify how you want the top containter to change but here is an example:
.top_container {
background: #000;
color: #fff;
width: 200px;
height: 50px;
padding: 10px;
}
.top_container.top_container--narrow {
width: 100px;
}
<div class="top_container">
Default
</div>
<div class="top_container top_container--narrow">
Narrow
</div>
I add the page name to the body class, and make changes like that using CSS like
.style {
margin: 0;
}
.home .style {
margin: 10px;
}
From what I learned in coding scss, it is better to make your class name a general one. In css only you can make it like this:
CSS
.top-container{
width: 100%;
}
.top-container.about{
width:60%
}
.top-container.contact{
width:30%
}
HTML
home.html
<div class="top-container"></div>
about.html
<div class="top-container about"></div>
contact.html
<div class="top-container contact"></div>
The about class will override whatever style you have in top-container. So its easy to use, short and quite simple. You can use this in making your class name a more general one.
If there are same elements on both pages such as Header then you can use the same class name for them on both pages so that they will look exactly identical on both pages. And for making some changes to those elements you can use different CSS selectors. In the below given code, I have used class and id as selectors.
I HOPE THIS ANSWER MEETS YOUR REQUIRMENTS.
Homepage: header background color is blue.
<header class="top_container" id="home_header">
<!--YOUR WEBSITE HEADER-->
<h1>TITLE</h1>
</header>
<div>
<!--YOUR SITE CONTENT-->
</div>
About page: header background color is red
<header class="top_container" id="about_header">
<!--YOUR WEBSITE HEADER-->
<h1>TITLE</h1>
</header>
<div>
<!--YOUR SITE CONTENT-->
</div>
CSS file:
.top_container{
background-color: blue;
color: white;
}
#about_header{
background-color: red;
}
I would do like so. Cause you might have a .top-container on every page you need to set like a "default" style for .top-container. So CSS Cascading Style Sheet. Cascade from top and if an element needs to be a little different just set the differences in a more specific defined class. Something like so:
.top-container {
/* apply all styles for .top-container */
}
.home.top-container {
/* this .top-container will have all styles from .top-container defined above */
/* so only define all DIFFERENT things for .home.top-container here */
}
.about.top-container {
/* define all DIFFERENT things for .about.top-container here */
/* like before it will always have the .top-container styles */
}
I'm trying to make a custom infowindow in CartoDB Editor. From the docs, it should be possible to use a <style> block to specify or override the default styles. But it seems like the whole block get's ignored. When I look at the Chrome Dev Tools, my styles are not present at all. They don't get overridden, they are just not there. Inline styles work fine, though.
The markup for the info window popup:
<style type="text/css">
div.cartodb-popup.v2.custom {
background: #666;
}
div.cartodb-popup.v2.custom:before {
border-top: 14px solid #666;
}
div.cartodb-popup.v2.custom h4 {
color: #fff;
}
div.cartodb-popup.v2.custom p {
color: #ff0;
}
</style>
<div class="cartodb-popup v2 custom">
x
<div class="cartodb-popup-content-wrapper">
<h4>{{boroname}}</h4>
<p>Borough code: {{borocode}}</p>
</div>
<div class="cartodb-popup-tip-container"></div>
</div>
Any ideas what I could be doing wrong? I already tried it with and without the custom class, but I left it in there, because i thought some extra specifity won't do any harm. I'm pretty sure this <style> approach worked a year ago.
I could do most styling using inline styles, but that's very cumbersome and doesn't work for pseudo elements, like the small popup arrow.
Any way to do this on the web interface, or do we need to host this on our own servers to edit the .js scripts, etc?
This is my map: https://stekhn.cartodb.com/viz/a2534c80-87b0-11e5-a2ef-0e787de82d45/embed_map
The example above is outdated and <style> blocks in the infowindow editor are not allowed any more. You can only use CSS inline styles in the CartoDB frontend editor. To get full control over the infowindow and the tooltip appearance, use cartoDB.js. In this example I'm changing the popup background color to grey:
<link rel="stylesheet" type="text/css" href="http://libs.cartocdn.com/cartodb.js/v3/3.15/themes/css/cartodb.css">
<script src="http://libs.cartocdn.com/cartodb.js/v3/3.15/cartodb.js"></script>
<style type="text/css">
div.cartodb-popup.v2.custom {
background: #666;
}
div.cartodb-popup.v2.custom:before {
border-top: 14px solid #666;
}
div.cartodb-popup.v2.custom h3,
div.cartodb-popup.v2.custom p {
color: #fff;
}
</style>
<section id="map"></section>
<script type="infowindow/html" id="template">
<div class="cartodb-popup v2 custom">
x
<div class="cartodb-popup-content-wrapper">
<h3>{{name}}</h3>
<p>{{description}}</p>
</div>
<div class="cartodb-popup-tip-container"></div>
</div>
</script>
<script type="text/javascript">
cartodb.createVis('map', 'https://your-accout.cartodb.com/api/v2/viz/477bdfc0-8210-11e5-936b-0e787de82d45/viz.json', {
tiles_loader: true,
center_lat: 48.6,
center_lon: 11.4,
zoom: 7
})
.done(function(vis, layers) {
var subLayer = layers[1].getSubLayer(1);
// Select template from dom
subLayer.infowindow.set('template', $('#template').html());
});
</script>
Weirdly, I was able to get my infowindow to dynamically get taller without using any script tags. I set the width of the window using the web interface, and then added this to the infowindow custom HTML by clicking the button near the top.
{{mtrsrc}} is a column in my table.
Here's my code:
<div class="cartodb-popup v2 custom_infowindow">
x
<div class="cartodb-popup-content-wrapper">
<div class="row">
<div class="label"></div>
<div class="info">
<img height="300" src="http://pesticideresearch.com/fum/{{mtrsrc}}.png" />
</div>
</div>
</div>
<div class="cartodb-popup-tip-container"></div>
</div>
First of all many thanks for this page, it has been helping me a lot! But at this point I have a question where I cannot find an answer that fits what I want (maybe it cannot be achieved the way I am doing it).
I want to have a link with a static image, and when the user moves the cursor over the link I want an animated gif to play (the anim gif is set to not loop, so it only plays once). And when the user moves out go back to the static image and if the user goes in again, the gif should play again from the beginning.
I am using html5 combined with CSS to create my web (which I am using to learn at the same time). I did programing in the past with C++ and similar, but never on a web context.
So far this is what I tried:
CSS:
.img-acu
{
float: left;
width: 450px;
height: 264px;
background:transparent url("acu.gif") center top no-repeat;
}
.img-acu:hover
{
background-image: url("acusel.gif");
}
HTML:
But nothing at all appears :(
The weird thing is, I used this same example with two static images (png format) and it worked fine, but for some reason with the animated gif it doesn't want to work.
The I tried this:
CSS:
#test
{
width: 450px;
height: 264px;
background-image: url("acu.gif");
background-repeat: no-repeat;
background-position: left;
margin-left: 75px;
}
#test:hover
{
background-image: url("acusel.gif");
}
HTML:
<div id="test"></div>
And that works perfectly, it is just the link doesn't work and when the animated gif reaches the last frame, it never resets (unless I reload the page).
Do you know if there is any way to achieve this properly in HTML5 + CSS? should I use javascript or php?
I would really appreciate any help!
Thanks a lot!!
That can be achieved by use a static image and your gif image(Hey, that how 9gag do it!)
A basic script could be somthing like that:
<img id="myImg" src="staticImg.png" />
<script>
$(function() {
$("#myImg").hover(
function() {
$(this).attr("src", "animatedImg.gif");
},
function() {
$(this).attr("src", "staticImg.jpg");
}
);
});
</script>
Hopefully this simple way can help someone:
<img class="static" src="https://lh4.googleusercontent.com/-gZiu96oTuu4/Uag5oWLQHfI/AAAAAAAABSE/pl1W8n91hH0/w140-h165-no/Homer-Static.png"><img class="active" src="https://lh4.googleusercontent.com/i1RprwcvxhbN2TAMunNxS4RiNVT0DvlD9FNQCvPFuJ0=w140-h165-no">
Then add the following CSS:
.static {
position: absolute;
background: white;
}
.static:hover {
opacity: 0;
}
This should hopefully help some people. I got the code from a codepen and decided some stack overflow users may find it helpful. If you would like to view the original codepen, visit here: CodePen
The approach you took did not work because CSS will not change the background on < a >. Solving this can be done entirely with vanilla JS + HTML. The trick is to place:
<div class="img-acu">
inside of:
(insert here)
All that's left is to have CSS target the div. That way, you can set the static background, which then changes on :hover
Here's a fiddle showing this in action (or you can fiddle with this: https://jsfiddle.net/lyfthis/yfmhd1xL/):
.img-acu
{
float: left;
width: 250px;
height: 132px;
background:transparent url("https://i.imgur.com/7r91PY3.jpeg") center top no-repeat;
background-size: 125%;
}
.img-acu:hover
{
background-image: url("https://media.giphy.com/media/QMkPpxPDYY0fu/giphy.gif");
}
<!-- Don't do this:
-->
<div>
<div>Click on image below to go to link:</div>
<a href="https://www.google.com" title="ACU Project link">
<div class="img-acu"></div>
</a>
</div>
Try this if you are OK to use canvas:
<!DOCTYPE html>
<html>
<head>
<style>
.wrapper {position:absolute; z-index:2;width:400px;height:328px;background-color: transparent;}
.canvas {position:absolute;z-index:1;}
.gif {position:absolute;z-index:0;}
.hide {display:none;}
</style>
<script src="https://code.jquery.com/jquery-3.2.1.min.js" integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4=" crossorigin="anonymous"></script>
<script>
window.onload = function() {
var c = document.getElementById("canvas");
var ctx = c.getContext("2d");
var img = document.getElementById("gif");
ctx.drawImage(img, 0, 0);
}
$(document).ready(function() {
$("#wrapper").bind("mouseenter mouseleave", function(e) {
$("#canvas").toggleClass("hide");
});
});
</script>
</head>
<body>
<div>
<img id="gif" class="gif" src="https://www.macobserver.com/imgs/tips/20131206_Pooh_GIF.gif">
<canvas id="canvas" class="canvas" width="400px" height="328px">
Your browser does not support the HTML5 canvas tag.
</canvas>
<div id="wrapper" class="wrapper"></div>
</div>
</body>
</html>
Before continue reading:
This is a polymer 0.5 question and has been deprecated after 1.0 release.
I'm trying to have a toolbar always shown at the top of the web. Then, split the container in a core-drawer-panel, but this element is being displayed always at the top of the web, overwriting the toolbar.
Using the polymer designer: I want to achieve something like this:
If I get the code from the designer, I have:
<core-toolbar id="core_toolbar"></core-toolbar>
<core-drawer-panel transition id="core_drawer_panel" touch-action>
<section id="section" drawer></section>
<section id="section1" main>
<core-field id="core_field" icon="search" theme="core-light-theme" center horizontal layout>
<core-input id="core_input" flex></core-input>
</core-field>
</section>
</core-drawer-panel>
But if I just use that code, the core-drawer goes to top, hiding the toolbar, resulting in something like:
Any idea about how to "move" the core-drawer-panel if there's a toolbar?
Keep in mind I don't want to have a toolbar in the drawer as in the example, but one for the whole app.
Of course, I know I could achieve it by using CSS, but I'm wondering if I'm setting wrong the polymer elements structure.
Just use core-header-panel in order to host your core-toolbar and core-drawer-panel. It will prevent core-drawer-panel of overlapping core-toolbar as you pictured in your example. Here is a jsfiddle and snipped:
http://jsfiddle.net/kreide/ehwa3w1n/
html, body {
height: 100%;
margin: 0;
}
core-header-panel {
height: 100%;
}
[drawer] {
box-shadow: 1px 0 1px rgba(0, 0, 0, 0.1);
}
[main] {
height: 100%;
background-color: rgb(231, 238, 238);
}
<link rel="import" href="http://www.polymer-project.org/components/polymer/polymer.html">
<link rel="import" href="http://www.polymer-project.org/components/paper-elements/paper-elements.html">
<link rel="import" href="http://www.polymer-project.org/components/core-elements/core-elements.html">
<body fullbleed layout vertical>
<core-header-panel flex>
<core-toolbar>
<div>Hello World!</div>
</core-toolbar>
<div class="content">
<core-drawer-panel>
<section drawer>Left</section>
<section main>Right</section>
</core-drawer-panel>
</div>
</core-header-panel>
</body>
The solution by kreide doesn't work for Polymer 1.0
To affix paper-drawer-panel in 1.0 add a css style = "position:relative" to the drawer tag.