I am busy developing a mobile app in Ionic v4 using Angular as my front end. I am currently using animate.css to animate some of the transitions. I would like one div to fade out and the other fade in once data has been loaded on the backend.
So I have gotten the switching part right, using an *ngIf on each of the div's to check when the data has been pulled through. Using animate.css I can get the second div to fade in by applying animated fadeIn to the class attribute of the div.
So the only part left is to fade out the first div, now I have tried conditionally setting the classes for the div using: [ngClass]="(information != null) ? 'animated fadeOut' : ''" but it would seem to me that this only gets evaluated once when the view renders and never again, unlike *ngIf.
Does anyone know a way I can conditionally apply a class on a div when the evaluated expression is true, that will be checked throughout the lifecycle of the view such as *ngIf?
Related
I am using materialize-css library in angular. Along with the materialize-css I am using materialize-stepper library that is based on the materialize-css.
MaterializeCSS uses .waves-effect CSS class to provide ripple effect on buttons, a tag and on all other clickables.
materialize-stepper also uses the .waves-effect. When I click on the node with .waves-effect class it appends a div having the ripple effect. Problem is on the next click it adds one new div with ripple effect. So it makes the clickable button or node with dark background (step 2) as this does not remove existing div.
what could be the possible issue?
I am currently building a small web page using react-redux. In my page I am rendering two containers. One container has a button that on clicking causes a change in the state and as a result the content in the other container also changes e.g initially there is a div container with text hello my name is rishi bhatia. As soon as I click on the button the a separate div container with 4 links replaces the previously displayed div container. What are the possible ways in which I can add animations when the content in the container changes. All I am doing is displaying different div containers on state change.
You can implement componentWillReceiveProps(nextProps). Here you can define your animation when component receive props playing with state.
Even if your component is just presentational id doesn't mean it cannot use state for graphical purposes.
I am trying to create a profile menu for my polymer website, something on the lines of github.com
If you notice,there is a triangular tip at the top of the menu.I am trying to create a similar triangle at the top of paper-listbox.
The problem I am facing is that the triangle seems to hide as soon as it gets out of the boundaries of paper-listbox.
I have create a jsbin to demonstrate my problem: http://jsbin.com/samaloqowu/1/edit?html,console,output
If you change the top property of the triangle (say -16px), it hides when it gets out of the listbox region. Please help me solve this CSS issue.
Short answer : No you can't.
Explanation : Because the dropdown content get encapsulated in a slotted element that gets styled inside the shadowRoot of the custom element you try to modify the behavior. And the paper-menu-button doesn't actually gives you a way to directly customize the slotted.
But there is a trick ! You can access the slotted through classic javascript. Just alter your connectedCallback function and add this line :
...
connectedCallback() {
super.connectedCallback();
this.$.profileMenu.$.dropdown.querySelector('.dropdown-content').style.overflow = 'visible';
...
}
...
This should do the trick, I agree this looks totally awful and trying to force and change the initial behavior of an element is not really recommended but well it seems to work, just make some tests when the element gets in a new context to see if anything breaks.
UPDATE (22/09/2017) :
Thinking of that again, I think this is a terrible idea to change this overflow to visible, I guess the polymer team has set the overflow to auto because if the list get long and you force the height of the element, the list will flow and be visible which is not really a dropdown anymore, but more like a full list display and that will mess with the general design purpose of your app. IMO when you start trying to mess with the inner properties of a custom element it means this element doesn't quench your requirement, and that it's time to make your own, especially when you try to modify the design of a custom element that has a design already implemented.
With the following rules:
.container[data-direction="reverse"] .pane[style*="display: none"]{
animation:SlideOutToRight 1s ease;
}
.container[data-direction="forward"] .pane[style*="display: none"]{
animation:SlideOutToLeft 1s ease;
}
The animation runs whenever (a) the data-direction attribute changes and (b) whenever the style becomes display:none. How can I change this code so that the animation only runs when the style becomes display:none but not when the data-direction attribute changes?
Right now, when the direction changes, all of the containers go flying across the screen to the other side because the animation gets applied to all of them when the data attribute changes value.
The data-direction attribute should only control which animation plays, but changes to it's value should not trigger the animation. Is this possible?
Update:
Here is a fiddle of the problem: https://jsfiddle.net/j6ytzbh6/
Expected behavior: The forward button should cause the next sequential box to enter from the right hand side while the current box exists left. The backward button should cause the previous sequential box to enter from the left while the current box exits right. No other box should move or cross the view-port when its not it's turn to move.
Reminder: This is a CSS question, so doing the animation in javascript is cheating. The idea is that Javascript controls functionality (ie a box should be shown or hidden) while css controls presentation (ie. do we make it disappear, fade out or fly to the side). You shouldn't have to re-write your plugin to change the visual way things get shown or hidden.
Is there a way to move down by some pixel a div with a text inside? (Maybe using jQuery or w/e)
The effect I would get is like when stackoverflow shows at top the yellow message (for a badge) But I need it inside a page, without moving down all the rest of the page
EXAMPLE:
http://img690.imageshack.us/img690/7324/senzatitolo2mb.jpg
(I would add a fade effect too while the message is moving down)
Ps. Please consider the message can be more than 1 (just like stackoverflow at top)
with jQuery this would be done like:
<div id="message">Some message</div>
$("#message").slideDown(500); //where 500 is the time effect in miliseconds..
Online demo: http://jsfiddle.net/NzPfM/
Se more about jQuery effects here: http://api.jquery.com/category/effects/
If you want to slide it down and fade it in at the same time, then you should use .animate() instead, something like:
$("#message").animate({height:"30px", opacity:1 },500);
Online demo: http://jsfiddle.net/NzPfM/1/
UPDATE: If you want to avoid moving other content while animating you can use position:absolute in css see demo below:
Demo avoiding push down: http://jsfiddle.net/NzPfM/2/
You can set the div to position:absolute and then animate it down using jQuery.animate to change the top style.
read about jQuery.animate here: http://api.jquery.com/animate/
You can see a simple example here: http://jsfiddle.net/NsxTa/
Note: This method as opposed to using the slideDown will actually slide the entire div down from it's hiding place, where as slideDown will just reveal statically positioned content, which imo looks really awefull
Assuming that your page is not laying inside some container with position-absolute,
adding a container element as fist child of the body will push down render all the rest of the page.
(container - any HTML tag that contains HTML. usually DIV).
This is an example using pure javascript:
http://jsfiddle.net/osher/ByngB/
connect the "add" to your messaging event, or render the on the server
connect the "remove" to the close button of the message bar
and that will be all :)
function $e(s){ return document.getElementById(s) }
function add(){
var d = document.createElement("div");
d.innerHTML = "your message: " + $e("txt").value;
document.body.insertBefore(d, document.body.firstChild);
}
function remove(){
// assuming that your page content is wrapped in a div with ID="content"
if (document.body.firstChild.id == "content") return;
document.body.removeChild( document.body.firstChild);
}