CSS Line Clamp - Scroll Back to Initial Position - html

I have implemented some collapsible block of text with CSS line-clamp and it is working just fine, except for one simple detail that is actually bugging me as I can't come up with a solution.
Right now, I have this:
HTML
<div class="description-row">
<article>
<?php
$features = $property->get_features();
if (!empty($features)) : ?>
<p class="text-collapse"><?php the_excerpt(); ?></p>
<?php else : ?>
<p class="text-collapse no-features"><?php the_excerpt(); ?></p>
<?php endif; ?>
</article>
See full description
</div>
SCSS (SASS)
.text-collapse {
overflow: hidden;
display: -webkit-box;
-webkit-box-orient: vertical;
-webkit-line-clamp: 3;
position: relative;
line-height: 1.69;
letter-spacing: 0.32px;
&.no-features {
-webkit-line-clamp: 16;
}
&.active {
-webkit-line-clamp: unset;
}
}
.see-full-desc-btn {
&:after {
padding-left: 1rem;
content: url('/chevron-down-solid.svg');
}
&.open:after {
content: "";
padding-left: 0;
}
#include respond(tab-port) {
margin-bottom: 2.5rem;
}
}
jQuery
jQuery(document).ready(function ($) {
$(".see-full-desc-btn").click(function () {
$(".text-collapse").toggleClass("active");
$(".see-full-desc-btn").toggleClass("open");
if ($(".see-full-desc-btn").hasClass("open")) {
$(".see-full-desc-btn").html("Close Description");
} else {
$(".see-full-desc-btn").html("See full description");
}
});
});
Basically I get this block of text, then the code will clamp the lines depending on the size of the text and it will show a button that opens / closes that text block.
The thing is that when the text is big (specially on mobile) you scroll down to read, and when you click the close button, you are left in the worng scroll position.
What I need is to somehow automatically scroll back to the initial position once the "Close" button is clicked.
Any hints?
Thank you very much!
Regards,
T

Related

How to show different values inside different Modals in HTML

I just want to share my code here where I got the Idea on W3schools. I already search of the same topic, but it didn't solve the problem of my Code.
/* The Modal (background) MY CSS CODE*/
.modal {
display: none; /* Hidden by default */
position: fixed; /* Stay in place */
z-index: 1; /* Sit on top */
padding-top: 100px; /* Location of the box */
left: 0;
top: 0;
width: 100%; /* Full width */
height: 100%; /* Full height */
overflow: auto; /* Enable scroll if needed */
background-color: rgb(0,0,0); /* Fallback color */
background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
}
/* The Modal1 (background) */
.modal1 {
display: none; /* Hidden by default */
position: fixed; /* Stay in place */
z-index: 1; /* Sit on top */
padding-top: 100px; /* Location of the box */
left: 0;
top: 0;
width: 100%; /* Full width */
height: 100%; /* Full height */
overflow: auto; /* Enable scroll if needed */
background-color: rgb(0,0,0); /* Fallback color */
background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
}
And heres the Javascript Code
<!-- Javascript -->
<script>
// Get the modal
var modal = document.getElementByclass("myModal");
// Get the button that opens the modal
var btn = document.getElementById("myBtn");
// Get the <span> element that closes the modal
var span = document.getElementsByClassName("close")[0];
// When the user clicks the button, open the modal
btn.onclick = function() {
modal.style.display = "block";
}
// When the user clicks on <span> (x), close the modal
span.onclick = function() {
modal.style.display = "none";
}
// When the user clicks anywhere outside of the modal, close it
window.onclick = function(event) {
if (event.target == modal) {
modal.style.display = "none";
}
}
</script>
<script>
// Get the modal1
var modal = document.getElementByIclass("myModal1");
// Get the button that opens the modal
var btn = document.getElementById("myBtn1");
// Get the <span> element that closes the modal
var span = document.getElementsByClassName("close1")[0];
// When the user clicks the button, open the modal
btn.onclick = function() {
modal.style.display = "block";
}
// When the user clicks on <span> (x), close the modal
span.onclick = function() {
modal.style.display = "none";
}
// When the user clicks anywhere outside of the modal, close it
window.onclick = function(event) {
if (event.target == modal) {
modal.style.display = "none";
}
}
</script>
And Lastly, the HTML Code
<!-- Trigger/Open The Modal -->
<button id="myBtn">Apply Now</button>
<!-- The Modal -->
<div class="myModal" class="modal">
<!-- Modal content -->
<div class="modal-content">
<span class="close">×</span>
<p>Some text in the Modal..</p>
</div>
</div>
<!-- Trigger/Open The Modal1 -->
<button id="myBtn1">Apply Now</button>
<!-- The Modal -->
<div class="myModal1" class="modal1">
<!-- Modal content -->
<div class="modal-content">
<span class="close1">×</span>
<p>Some text in the Modalsssssss..</p>
</div>
</div>
I've been kinda stuck with this for a long time. Any opinion or suggestions will be greatly appreciated.
**** UPDATE**
Read your comment and I agree, this is pretty "hacky" and I personally would almost never do this. So I want to show you a solution which is closer to what I would do on a production site. A quick overview:
The code for the actual modal is good, so we can use that.
What I think is "hacky" here is the way we get the data to feed to the modal. Storing data in HTML elements is not terrible, but there are way better ways to do this.
A good way to store this kind of data (strings, numbers, etc.) is with JSON.
We can include the JSON data in the document itself, or we can use AJAX to store it in a different location. Could be a file on the server, or maybe a database somewhere.
More info on $.getJSON() method.
/* Same code from previous example. New code marked with comments */
$("body").on("click", ".toggle-modal", function() {
if ($(".modal").is(":visible")) {
$(".modal").fadeOut("fast", function() {
$(this).remove()
});
} else {
/* Get the data ID from the html element */
const data_id = $(this).data("modal-text");
/* Get JSON data from file on server (simplified)
Replace the url with the path to your JSON file on the server. */
$.getJSON("https://httpbin.org/json", function(response) { // <-- Callback function
/* This is the "callback" function from the "getJSON" method
This fires when the AJAX request has been completed
This function has access to the AJAX response variable which contains the returned data */
/* Light validation here just checks if the response is json */
if (typeof response == 'object') {
/* For kicks let's check out the response */
console.log(response);
/* The response is obviously not our data. Next variable emulates correct response */
response = {
primary_modal: "The message for the primary modal",
secondary_modal: "The message for the secondary modal"
}
/* Get the correct message from the response.
Use the value from the data attribute as the key to find our data in the json structure */
const msg = response[data_id];
/* Launch the modal */
const modal = $("<div />", {
"class": "modal"
}).append(
$("<div />", {
"class": "modal-overlay toggle-modal"
}),
$("<div />", {
"class": "modal-container"
}).append(
$("<div />", {
"class": "modal-close toggle-modal"
}),
$("<div />", {
"class": "modal-content"
}).text(msg) // <-- The message
)
).appendTo("body")
.fadeIn("fast")
.css("display", "flex");
} else {
return "Couldn't get the data";
}
});
}
})
body,
html {
margin: 0;
padding: 0;
height: 100%;
width: 100%;
background: cyan;
display: flex;
justify-content: center;
align-items: center;
}
.modal {
display: none;
position: fixed;
top: 0;
left: 0;
right: 0;
bottom: 0;
z-index: 9000;
padding: 20px;
}
.modal-overlay {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
z-index: 1;
background: rgba(0, 0, 0, .8);
cursor: pointer;
}
.modal-container {
background: white;
margin: auto;
position: relative;
font-size: 16px;
line-height: normal;
text-align: center;
font-weight: bold;
z-index: 20;
}
.modal-close {
position: absolute;
top: 0;
right: 0;
width: 12px;
height: 12px;
font-family: sans-serif;
font-size: 14px;
line-height: 1;
overflow: hidden;
cursor: pointer;
padding: 8px 20px;
background: coral;
color: white;
display: flex;
justify-content: center;
align-items: center;
}
.modal-close:before {
content: "X"
}
.modal-content {
padding: 35px 20px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<!-- We removed the modal data and added a reference to the data in the json -->
<div>
<button class="toggle-modal" data-modal-text="primary_modal">Click Here</button>
<button class="toggle-modal" data-modal-text="secondary_modal">Click Here</button>
</div>
Here is a really easy way to re-purpose a modal template for different content using jQuery. Basically you store the message right in the button's data attribute, then just append that content to the dynamically generated modal.
/* Listen for the click event on the button */
$("body").on("click", ".toggle-modal", function() {
/* Check if modal is open */
if ($(".modal").is(":visible")) {
/* if modal is already visible close it out */
$(".modal").fadeOut("fast", function() {
$(this).remove()
});
} else {
/* Get message from button */
const msg = $(this).data("modal-text");
/* dynamically create modal elements */
const modal = $("<div />", {
"class": "modal"
}).append(
$("<div />", {
"class": "modal-overlay toggle-modal"
}),
$("<div />", {
"class": "modal-container"
}).append(
$("<div />", {
"class": "modal-close toggle-modal"
}),
$("<div />", {
"class": "modal-content"
}).text(msg) /* Append text to modal */
)
).appendTo("body") /* Append modal to body */
.fadeIn("fast") /* Fade in modal */
.css("display", "flex") /* Flexbox to center content */
}
})
body,
html {
margin: 0;
padding: 0;
height: 100%;
width: 100%;
background: cyan;
display: flex;
justify-content: center;
align-items: center;
}
.modal {
display: none;
position: fixed;
top: 0;
left: 0;
right: 0;
bottom: 0;
z-index: 9000;
padding: 20px;
}
.modal-overlay {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
z-index: 1;
background: rgba(0, 0, 0, .8);
cursor: pointer;
}
.modal-container {
background: white;
margin: auto;
position: relative;
font-size: 16px;
line-height: normal;
text-align: center;
font-weight: bold;
z-index: 20;
}
.modal-close {
position: absolute;
top: 0;
right: 0;
width: 12px;
height: 12px;
font-family:sans-serif;
font-size:14px;
line-height:1;
overflow: hidden;
cursor: pointer;
padding: 8px 20px;
background: coral;
color: white;
display: flex;
justify-content: center;
align-items: center;
}
.modal-close:before {
content: "X"
}
.modal-content {
padding: 35px 20px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<!-- Set the modal text right in the data attribute of the button. This approach works for short messages but may not be well suited for more complex content -->
<div>
<button class="toggle-modal" data-modal-text="Short message to be displayed in the first modal">Click Here</button>
<button class="toggle-modal" data-modal-text="A different message for the secondary modal">Click Here</button>
</div>

Vue.js: do not show element until it is in correct position

I am learning Vue and really enjoying it. I have a tab that I want fixed to the bottom of the browser window when the page loads. When a user clicks the tab, it will slide up to show some content.
Everything is working great. I am able to have the tab stick to the bottom of the page - and click events are working great as well.
The problem I am having is that I need to calculate the height of tab (and div) to set the CSS property correctly. When the page loads, you can see the tab slide down into place. I would like to hide the tab until everything has been calculated and it's in the correct place.
Here is what I'm using:
app.js
new Vue({
el: '#info',
delimiters: ['${', '}'],
data: {
active: false,
inactive: true,
styles: {
'bottom': 0
},
},
methods() {
toggle: function (event) {
event.preventDefault();
this.active = !this.active;
this.inactive = !this.inactive;
}
},
mounted() {
let tabHeight = this.$refs.infoTab.clientHeight;
let boxHeight = this.$refs.infoBox.clientHeight; // 473px
this.styles.bottom = -boxHeight + 'px';
}
});
HTML
<div class="info not-active" id="info" #click="toggle" ref="infoTab"
v-cloak
v-bind:class="{ active: active }"
v-bind:style="styles">
<!-- content -->
</div>
style.css
[v-cloak] {
display: none;
}
/* more classes */
.info {
width: 100%;
position: fixed;
&.inactive {
bottom: -100%;
}
&.active {
bottom: 0 !important;
}
}
I know I am close, I just don't want users to see the tab slide into place. It should just be there. I tried using the created hook, but clientHeight is not available.
Any suggestions are greatly appreciated!
I think you can solve this just using CSS, no need to use any of Vue's lifecycle hooks, I made a pen with a vanilla JS example:
let infoNode = document.getElementById('info');
infoNode.addEventListener('click', () => {
if (infoNode.style.top) {
// clear inline top style
infoNode.style.top = '';
} else {
// set top to client height + 2 * border thickness
infoNode.style.top = `calc(100% - ${infoNode.clientHeight}px - 4px)`;
}
});
#info {
font-size: 16px;
width: 200px;
border: 2px solid hsl(0, 0%, 80%);
padding: 8px;
border-radius: 4px;
cursor: pointer;
position: fixed;
/* 100% height of the viewport subtracting:
tab height: padding, margin, & font size */
top: calc(100% - (8px + 8px + 24px));
/* we center the tab horizontally here using
50% the width of the viewport - 50% the fixed
width of the tab */
left: calc(50% - 200px/2);
transition: top 0.5s;
}
.title {
font-size: 24px;
font-weight: 500;
margin-bottom: 8px;
display: block;
}
p {
margin: 0;
}
<div id="info">
<span class="title">Click on Me</span>
<p>
This is the content of the tab, isn't it great? I think so too, and it can be of any arbitrary length!
</p>
</div>
Basically the trick is to use calc with top instead of -100% with bottom for your positioning, then your tab is initially rendered in the correct position and you don't have to worry it being out of place when a visitor first loads your page.

Issues with resizing divs that are siblings and flex box [duplicate]

Here is an example chat app ->
The idea here is to have the .messages-container take up as much of the screen as it can. Within .messages-container, .scroll holds the list of messages, and in case there are more messages then the size of the screen, scrolls.
Now, consider this case:
The user scrolls to the bottom of the conversation
The .text-input, dynamically gets bigger
Now, instead of the user staying scrolled to the bottom of the conversation, the text-input increases, and they no longer see the bottom.
One way to fix it, if we are using react, calculate the height of text-input, and if anything changes, let .messages-container know
componentDidUpdate() {
window.setTimeout(_ => {
const newHeight = this.calcHeight();
if (newHeight !== this._oldHeight) {
this.props.onResize();
}
this._oldHeight = newHeight;
});
}
But, this causes visible performance issues, and it's sad to be passing messages around like this.
Is there a better way? Could I use css in such a way, to express that when .text-input-increases, I want to essentially shift up all of .messages-container
2:nd revision of this answer
Your friend here is flex-direction: column-reverse; which does all you ask while align the messages at the bottom of the message container, just like for example Skype and many other chat apps do.
.chat-window{
display:flex;
flex-direction:column;
height:100%;
}
.chat-messages{
flex: 1;
height:100%;
overflow: auto;
display: flex;
flex-direction: column-reverse;
}
.chat-input { border-top: 1px solid #999; padding: 20px 5px }
.chat-input-text { width: 60%; min-height: 40px; max-width: 60%; }
The downside with flex-direction: column-reverse; is a bug in IE/Edge/Firefox, where the scrollbar doesn't show, which your can read more about here: Flexbox column-reverse and overflow in Firefox/IE
The upside is you have ~ 90% browser support on mobile/tablets and ~ 65% for desktop, and counting as the bug gets fixed, ...and there is a workaround.
// scroll to bottom
function updateScroll(el){
el.scrollTop = el.scrollHeight;
}
// only shift-up if at bottom
function scrollAtBottom(el){
return (el.scrollTop + 5 >= (el.scrollHeight - el.offsetHeight));
}
In the below code snippet I've added the 2 functions from above, to make IE/Edge/Firefox behave in the same way flex-direction: column-reverse; does.
function addContent () {
var msgdiv = document.getElementById('messages');
var msgtxt = document.getElementById('inputs');
var atbottom = scrollAtBottom(msgdiv);
if (msgtxt.value.length > 0) {
msgdiv.innerHTML += msgtxt.value + '<br/>';
msgtxt.value = "";
} else {
msgdiv.innerHTML += 'Long long content ' + (tempCounter++) + '!<br/>';
}
/* if at bottom and is IE/Edge/Firefox */
if (atbottom && (!isWebkit || isEdge)) {
updateScroll(msgdiv);
}
}
function resizeInput () {
var msgdiv = document.getElementById('messages');
var msgtxt = document.getElementById('inputs');
var atbottom = scrollAtBottom(msgdiv);
if (msgtxt.style.height == '120px') {
msgtxt.style.height = 'auto';
} else {
msgtxt.style.height = '120px';
}
/* if at bottom and is IE/Edge/Firefox */
if (atbottom && (!isWebkit || isEdge)) {
updateScroll(msgdiv);
}
}
/* fix for IE/Edge/Firefox */
var isWebkit = ('WebkitAppearance' in document.documentElement.style);
var isEdge = ('-ms-accelerator' in document.documentElement.style);
var tempCounter = 6;
function updateScroll(el){
el.scrollTop = el.scrollHeight;
}
function scrollAtBottom(el){
return (el.scrollTop + 5 >= (el.scrollHeight - el.offsetHeight));
}
html, body { height:100%; margin:0; padding:0; }
.chat-window{
display:flex;
flex-direction:column;
height:100%;
}
.chat-messages{
flex: 1;
height:100%;
overflow: auto;
display: flex;
flex-direction: column-reverse;
}
.chat-input { border-top: 1px solid #999; padding: 20px 5px }
.chat-input-text { width: 60%; min-height: 40px; max-width: 60%; }
/* temp. buttons for demo */
button { width: 12%; height: 44px; margin-left: 5%; vertical-align: top; }
/* begin - fix for hidden scrollbar in IE/Edge/Firefox */
.chat-messages-text{ overflow: auto; }
#media screen and (-webkit-min-device-pixel-ratio:0) {
.chat-messages-text{ overflow: visible; }
/* reset Edge as it identifies itself as webkit */
#supports (-ms-accelerator:true) { .chat-messages-text{ overflow: auto; } }
}
/* hide resize FF */
#-moz-document url-prefix() { .chat-input-text { resize: none } }
/* end - fix for hidden scrollbar in IE/Edge/Firefox */
<div class="chat-window">
<div class="chat-messages">
<div class="chat-messages-text" id="messages">
Long long content 1!<br/>
Long long content 2!<br/>
Long long content 3!<br/>
Long long content 4!<br/>
Long long content 5!<br/>
</div>
</div>
<div class="chat-input">
<textarea class="chat-input-text" placeholder="Type your message here..." id="inputs"></textarea>
<button onclick="addContent();">Add msg</button>
<button onclick="resizeInput();">Resize input</button>
</div>
</div>
Side note 1: The detection method is not fully tested, but it should work on newer browsers.
Side note 2: Attach a resize event handler for the chat-input might be more efficient then calling the updateScroll function.
Note: Credits to HaZardouS for reusing his html structure
You just need one CSS rule set:
.messages-container, .scroll {transform: scale(1,-1);}
That's it, you're done!
How it works: First, it vertically flips the container element so that the top becomes the bottom (giving us the desired scroll orientation), then it flips the content element so that the messages won't be upside down.
This approach works in all modern browsers. It does have a strange side effect, though: when you use a mouse wheel in the message box, the scroll direction is reversed. This can be fixed with a few lines of JavaScript, as shown below.
Here's a demo and a fiddle to play with:
//Reverse wheel direction
document.querySelector('.messages-container').addEventListener('wheel', function(e) {
if(e.deltaY) {
e.preventDefault();
e.currentTarget.scrollTop -= e.deltaY;
}
});
//The rest of the JS just handles the test buttons and is not part of the solution
send = function() {
var inp = document.querySelector('.text-input');
document.querySelector('.scroll').insertAdjacentHTML('beforeend', '<p>' + inp.value);
inp.value = '';
inp.focus();
}
resize = function() {
var inp = document.querySelector('.text-input');
inp.style.height = inp.style.height === '50%' ? null : '50%';
}
html,body {height: 100%;margin: 0;}
.conversation {
display: flex;
flex-direction: column;
height: 100%;
}
.messages-container {
flex-shrink: 10;
height: 100%;
overflow: auto;
}
.messages-container, .scroll {transform: scale(1,-1);}
.text-input {resize: vertical;}
<div class="conversation">
<div class="messages-container">
<div class="scroll">
<p>Message 1<p>Message 2<p>Message 3<p>Message 4<p>Message 5
<p>Message 6<p>Message 7<p>Message 8<p>Message 9<p>Message 10<p>Message 11<p>Message 12<p>Message 13<p>Message 14<p>Message 15<p>Message 16<p>Message 17<p>Message 18<p>Message 19<p>Message 20
</div>
</div>
<textarea class="text-input" autofocus>Your message</textarea>
<div>
<button id="send" onclick="send();">Send input</button>
<button id="resize" onclick="resize();">Resize input box</button>
</div>
</div>
Edit: thanks to #SomeoneSpecial for suggesting a simplification to the scroll code!
Please try the following fiddle - https://jsfiddle.net/Hazardous/bypxg25c/. Although the fiddle is currently using jQuery to grow/resize the text area, the crux is in the flex related styles used for the messages-container and input-container classes -
.messages-container{
order:1;
flex:0.9 1 auto;
overflow-y:auto;
display:flex;
flex-direction:row;
flex-wrap:nowrap;
justify-content:flex-start;
align-items:stretch;
align-content:stretch;
}
.input-container{
order:2;
flex:0.1 0 auto;
}
The flex-shrink value is set to 1 for .messages-container and 0 for .input-container. This ensures that messages-container shrinks when there is a reallocation of size.
I've moved text-input within messages, absolute positioned it to the bottom of the container and given messages enough bottom padding to space accordingly.
Run some code to add a class to conversation, which changes the height of text-input and bottom padding of messages using a nice CSS transition animation.
The JavaScript runs a "scrollTo" function at the same time as the CSS transition is running to keep the scroll at the bottom.
When the scroll comes off the bottom again, we remove the class from conversation
Hope this helps.
https://jsfiddle.net/cnvzLfso/5/
var doScollCheck = true;
var objConv = document.querySelector('.conversation');
var objMessages = document.querySelector('.messages');
var objInput = document.querySelector('.text-input');
function scrollTo(element, to, duration) {
if (duration <= 0) {
doScollCheck = true;
return;
}
var difference = to - element.scrollTop;
var perTick = difference / duration * 10;
setTimeout(function() {
element.scrollTop = element.scrollTop + perTick;
if (element.scrollTop === to) {
doScollCheck = true;
return;
}
scrollTo(element, to, duration - 10);
}, 10);
}
function resizeInput(atBottom) {
var className = 'bigger',
hasClass;
if (objConv.classList) {
hasClass = objConv.classList.contains(className);
} else {
hasClass = new RegExp('(^| )' + className + '( |$)', 'gi').test(objConv.className);
}
if (atBottom) {
if (!hasClass) {
doScollCheck = false;
if (objConv.classList) {
objConv.classList.add(className);
} else {
objConv.className += ' ' + className;
}
scrollTo(objMessages, (objMessages.scrollHeight - objMessages.offsetHeight) + 50, 500);
}
} else {
if (hasClass) {
if (objConv.classList) {
objConv.classList.remove(className);
} else {
objConv.className = objConv.className.replace(new RegExp('(^|\\b)' + className.split(' ').join('|') + '(\\b|$)', 'gi'), ' ');
}
}
}
}
objMessages.addEventListener('scroll', function() {
if (doScollCheck) {
var isBottom = ((this.scrollHeight - this.offsetHeight) === this.scrollTop);
resizeInput(isBottom);
}
});
html,
body {
height: 100%;
width: 100%;
background: white;
}
body {
margin: 0;
padding: 0;
}
.conversation {
display: flex;
flex-direction: column;
justify-content: space-between;
height: 100%;
position: relative;
}
.messages {
overflow-y: scroll;
padding: 10px 10px 60px 10px;
-webkit-transition: padding .5s;
-moz-transition: padding .5s;
transition: padding .5s;
}
.text-input {
padding: 10px;
-webkit-transition: height .5s;
-moz-transition: height .5s;
transition: height .5s;
position: absolute;
bottom: 0;
height: 50px;
background: white;
}
.conversation.bigger .messages {
padding-bottom: 110px;
}
.conversation.bigger .text-input {
height: 100px;
}
.text-input input {
height: 100%;
}
<div class="conversation">
<div class="messages">
<p>
This is a message content
</p>
<p>
This is a message content
</p>
<p>
This is a message content
</p>
<p>
This is a message content
</p>
<p>
This is a message content
</p>
<p>
This is a message content
</p>
<p>
This is a message content
</p>
<p>
This is a message content
</p>
<p>
This is a message content
</p>
<p>
This is a message content
</p>
<p>
This is a message content
</p>
<p>
This is a message content
</p>
<p>
This is a message content
</p>
<p>
This is a message content
</p>
<p>
This is the last message
</p>
<div class="text-input">
<input type="text" />
</div>
</div>
</div>
You write;
Now, consider this case:
The user scrolls to the bottom of the conversation
The .text-input, dynamically gets bigger
Wouldn't the method that dynamically sets the .text-input be the logical place to fire this.props.onResize().
To whom it may concern,
The answers above did not suffice my question.
The solution I found was to make my innerWidth and innerHeight variable constant - as the innerWidth of the browser changes on scroll to adapt for the scrollbar.
var innerWidth = window.innerWidth
var innerHeight = window.innerHeight
OR FOR REACT
this.setState({width: window.innerWidth, height: window.innerHeight})
In other words, to ignore it, you must make everything constant as if it were never scrolling. Do remember to update these on Resize / Orientation Change !
IMHO current answer is not a correct one:
1/ flex-direction: column-reverse; reverses the order of messages - I didn't want that.
2/ javascript there is also a bit hacky and obsolete
If you want to make it like a PRO use spacer-box which has properties:
flex-grow: 1;
flex-basis: 0;
and is located above messages. It pushes them down to the chat input.
When user is typing new messages and input height is growing the scrollbar moves up, but when the message is sent (input is cleared) scrollbar is back at bottom.
Check my snippet:
body {
background: #ccc;
}
.chat {
display: flex;
flex-direction: column;
width: 300px;
max-height: 300px;
max-width: 90%;
background: #fff;
}
.spacer-box {
flex-basis: 0;
flex-grow: 1;
}
.messages {
display: flex;
flex-direction: column;
overflow-y: auto;
flex-grow: 1;
padding: 24px 24px 4px;
}
.footer {
padding: 4px 24px 24px;
}
#chat-input {
width: 100%;
max-height: 100px;
overflow-y: auto;
border: 1px solid pink;
outline: none;
user-select: text;
white-space: pre-wrap;
overflow-wrap: break-word;
}
<div class="chat">
<div class="messages">
<div class="spacer-box"></div>
<div class="message">1</div>
<div class="message">2</div>
<div class="message">3</div>
<div class="message">4</div>
<div class="message">5</div>
<div class="message">6</div>
<div class="message">7</div>
<div class="message">8</div>
<div class="message">9</div>
<div class="message">10</div>
<div class="message">11</div>
<div class="message">12</div>
<div class="message">13</div>
<div class="message">14</div>
<div class="message">15</div>
<div class="message">16</div>
<div class="message">17</div>
<div class="message">18</div>
</div>
<div class="footer">
<div contenteditable role="textbox" id="chat-input"></div>
</div>
<div>
Hope I could help :)
Cheers

Hover over words in a text

What would be the best way to display a hover popup with a 20-30 words definition of each word in a foreign-language text?
Right now I am using an iframe:
<span class="tooltip">foreign-language-verb
<span class="tooltiptext">
2nd pers. sing. past tense, active mood.
<iframe class="tooltip" src="general_dictionary_definition_of_the_verb.html"></iframe>
</span>
</span>
It works but the page is then very slow to load and there seems to be a limit to the number of possible iframe's: they don't display anymore if the text is too long.
Any other solution, using javascript to load the text or something?
Thanks.
EDIT:
Following up on Richard P's remark: does that mean replacing iframe with javascript loading by hand, does that make sense, is that best practices? Would that be faster than the iframe's which are very slow to load?
Taking Javascript - read local text file into account:
<script type="text/javascript">
function loadDictionaryDefinitions()
{
var elements = document.getElementsByClassName("DictionaryDefinition");
for (var i = 0; i < elements.length; i++)
elements[i].innerHTML = readTextFile("file://" + elements[i].getAttribute("filename_of_dic_definition"));
}
function readTextFile(file)
{
var rawFile = new XMLHttpRequest();
rawFile.open("GET", file, false);
rawFile.onreadystatechange = function ()
{
if(rawFile.readyState === 4)
{
if(rawFile.status === 200 || rawFile.status == 0)
{
var allText = rawFile.responseText;
alert(allText);
}
}
}
rawFile.send(null);
}
</script>
and add:
<body onload="loadDictionaryDefinitions()">
what about css hover ? Try this one:
https://jsfiddle.net/maky/0h0ekhj6/
/* Tooltip container */
.tooltip {
position: relative;
display: inline-block;
border-bottom: 1px dotted black;
/* If you want dots under the hoverable text */
}
/* Tooltip text */
.tooltip .tooltiptext {
visibility: hidden;
width: 120px;
background-color: black;
color: #fff;
text-align: center;
padding: 5px 0;
border-radius: 6px;
/* Position the tooltip text - see examples below! */
position: absolute;
z-index: 1;
}
/* Show the tooltip text when you mouse over the tooltip container */
.tooltip:hover .tooltiptext {
visibility: visible;
}
You could use a popover in Bootstrap if you don't mind adding it to your project. It would require a bit of javascript but should be pretty simple. Most of the functionality of it is handled by Bootstrap.

How do I hover over span to let a div appear?

#hello{
font-size: 4em;
}
div.about{
display: none;
}
#hello:hover div.about {
display: block;
}
<pre id="hometext"><span id="hello">Hello!</span></pre>
<div class="about" id="about"><p>hello</p></div>
First of all, I am new to stackoverflow. Secondly, I want to over a specific part of a paragraph, the span, and then let this div appear. But it doesnt seem to work..
You dont have to use javascript:
#hometext:hover + #about { display:none; }
I am not quite sure if this is what you asked for, but you can utilize the span element's onmouseover and onmouseout attributes.
With a little bit of javascript, you can achieve what I think you want to do:
function hideDiv() {
document.getElementById("divToHide").style.visibility = 'hidden';
}
function showDiv() {
document.getElementById("divToHide").style.visibility = 'visible';
}
#divToHide {
height: 100px;
width: 100px;
background: red;
}
#hoverMe {
cursor: pointer;
}
<div id="divToHide">
</div>
<br />
<p>
This is a paragraph. If you hover <span id="hoverMe" onmouseover="hideDiv()" onmouseout="showDiv()">here</span>, it will hide the red box.
</p>
I think you need some javascript there:
function showOtherDiv() {
document.getElementById("about").style.display = "block";
}
function hideOtherDiv() {
document.getElementById("about").style.display = "none";
}
#hello {
font-size: 4em;
}
div.about {
display: none;
}
#hello:hover div.about {
display: block;
}
<pre id="hometext">
<span id="hello" onmouseover="showOtherDiv()" onmouseout="hideOtherDiv()">Hello!</span>
</pre>
<div class="about" id="about">
<p>hello</p>
</div>
Here is a codepen