Tuesday, 22 March 2016

javascript - Is it possible to apply CSS to half of a character?



What I am looking for:



A way to style one HALF of a character. (In this case, half the letter being transparent)




What I have currently searched for and tried (With no luck):




  • Methods for styling half of a character/letter

  • Styling part of a character with CSS or JavaScript

  • Apply CSS to 50% of a character



Below is an example of what I am trying to obtain.




x



Does a CSS or JavaScript solution exist for this, or am I going to have to resort to images? I would prefer not to go the image route as this text will end up being generated dynamically.






UPDATE:



Since many have asked why I would ever want to style half of a character, this is why. My city had recently spent $250,000 to define a new "brand" for itself. This logo is what they came up with. Many people have complained about the simplicity and lack of creativity and continue to do so. My goal was to come up with this website as a joke. Type in 'Halifax' and you will see what I mean.



Answer





enter image description here Feel free to fork and improve.










  • Pure CSS for a Single Character

  • JavaScript used for automation across text or multiple characters

  • Preserves Text Accessibility for screen readers for the blind or visually
    impaired





Half Style on text




Demo: http://jsfiddle.net/arbel/pd9yB/1694/






This works on any dynamic text, or a single character, and is all automated. All you need to do is add a class on the target text and the rest is taken care of.



Also, the accessibility of the original text is preserved for screen readers for the blind or visually impaired.



Explanation for a single character:




Pure CSS. All you need to do is to apply .halfStyle class to each element that contains the character you want to be half-styled.



For each span element containing the character, you can create a data attribute, for example here data-content="X", and on the pseudo element use content: attr(data-content); so the .halfStyle:before class will be dynamic and you won't need to hard code it for every instance.



Explanation for any text:



Simply add textToHalfStyle class to the element containing the text.









// jQuery for automated mode
jQuery(function($) {
var text, chars, $el, i, output;

// Iterate over all class occurences
$('.textToHalfStyle').each(function(idx, el) {
$el = $(el);
text = $el.text();

chars = text.split('');

// Set the screen-reader text
$el.html('' + text + '');

// Reset output for appending
output = '';

// Iterate over all chars in the text
for (i = 0; i < chars.length; i++) {

// Create a styled element for each character and append to container
output += '';
}

// Write to DOM only once
$el.append(output);
});
});

.halfStyle {
position: relative;

display: inline-block;
font-size: 80px; /* or any font size will work */
color: black; /* or transparent, any color */
overflow: hidden;
white-space: pre; /* to preserve the spaces from collapsing */
}

.halfStyle:before {
display: block;
z-index: 1;

position: absolute;
top: 0;
left: 0;
width: 50%;
content: attr(data-content); /* dynamic content for the pseudo element */
overflow: hidden;
color: #f00;
}




Single Characters:


X
Y
Z
A



Automated:



Half-style, please.






(JSFiddle demo)









Half Style on text - advanced - With Text Shadow



With this solution you can style left and right parts, individually and independently.



Everything is the same, only more advanced CSS does the magic.





jQuery(function($) {
var text, chars, $el, i, output;


// Iterate over all class occurences
$('.textToHalfStyle').each(function(idx, el) {
$el = $(el);
text = $el.text();
chars = text.split('');

// Set the screen-reader text
$el.html('' + text + '');


// Reset output for appending
output = '';

// Iterate over all chars in the text
for (i = 0; i < chars.length; i++) {
// Create a styled element for each character and append to container
output += '';
}

// Write to DOM only once

$el.append(output);
});
});

.halfStyle {
position: relative;
display: inline-block;
font-size: 80px; /* or any font size will work */
color: transparent; /* hide the base character */
overflow: hidden;
white-space: pre; /* to preserve the spaces from collapsing */

}

.halfStyle:before { /* creates the left part */
display: block;
z-index: 1;
position: absolute;
top: 0;
width: 50%;
content: attr(data-content); /* dynamic content for the pseudo element */
overflow: hidden;

pointer-events: none; /* so the base char is selectable by mouse */
color: #f00; /* for demo purposes */
text-shadow: 2px -2px 0px #af0; /* for demo purposes */
}

.halfStyle:after { /* creates the right part */
display: block;
direction: rtl; /* very important, will make the width to start from right */
position: absolute;
z-index: 2;

top: 0;
left: 50%;
width: 50%;
content: attr(data-content); /* dynamic content for the pseudo element */
overflow: hidden;
pointer-events: none; /* so the base char is selectable by mouse */
color: #000; /* for demo purposes */
text-shadow: 2px 2px 0px #0af; /* for demo purposes */
}



Single Characters:


X
Y
Z
A



Automated:



Half-style, please.






(JSFiddle demo)












Now that we know what is possible, let's create some variations.






-Horizontal Half Parts




  • Without Text Shadow:




    Horizontal Half Parts - No Text Shadow


  • Possibility of Text Shadow for each half part independently:



    halfStyle - Horizontal Half Parts - With Text Shadow






// jQuery for automated mode

jQuery(function($) {
var text, chars, $el, i, output;

// Iterate over all class occurences
$('.textToHalfStyle').each(function(idx, el) {
$el = $(el);
text = $el.text();
chars = text.split('');

// Set the screen-reader text

$el.html('' + text + '');

// Reset output for appending
output = '';

// Iterate over all chars in the text
for (i = 0; i < chars.length; i++) {
// Create a styled element for each character and append to container
output += '';
}


// Write to DOM only once
$el.append(output);
});
});

.halfStyle {
position: relative;
display: inline-block;
font-size: 80px; /* or any font size will work */
color: transparent; /* hide the base character */

overflow: hidden;
white-space: pre; /* to preserve the spaces from collapsing */
}

.halfStyle:before { /* creates the top part */
display: block;
z-index: 2;
position: absolute;
top: 0;
height: 50%;

content: attr(data-content); /* dynamic content for the pseudo element */
overflow: hidden;
pointer-events: none; /* so the base char is selectable by mouse */
color: #f00; /* for demo purposes */
text-shadow: 2px -2px 0px #af0; /* for demo purposes */
}

.halfStyle:after { /* creates the bottom part */
display: block;
position: absolute;

z-index: 1;
top: 0;
height: 100%;
content: attr(data-content); /* dynamic content for the pseudo element */
overflow: hidden;
pointer-events: none; /* so the base char is selectable by mouse */
color: #000; /* for demo purposes */
text-shadow: 2px 2px 0px #0af; /* for demo purposes */
}



Single Characters:


X
Y
Z
A



Automated:



Half-style, please.






(JSFiddle demo)










-Vertical 1/3 Parts




  • Without Text Shadow:



    halfStyle - Vertical 1/3 Parts - No Text Shadow


  • Possibility of Text Shadow for each 1/3 part independently:



    halfStyle - Vertical 1/3 Parts - With Text Shadow







// jQuery for automated mode
jQuery(function($) {
var text, chars, $el, i, output;

// Iterate over all class occurences
$('.textToHalfStyle').each(function(idx, el) {
$el = $(el);

text = $el.text();
chars = text.split('');

// Set the screen-reader text
$el.html('' + text + '');

// Reset output for appending
output = '';

// Iterate over all chars in the text

for (i = 0; i < chars.length; i++) {
// Create a styled element for each character and append to container
output += '';
}

// Write to DOM only once
$el.append(output);
});
});

.halfStyle { /* base char and also the right 1/3 */

position: relative;
display: inline-block;
font-size: 80px; /* or any font size will work */
color: transparent; /* hide the base character */
overflow: hidden;
white-space: pre; /* to preserve the spaces from collapsing */
color: #f0f; /* for demo purposes */
text-shadow: 2px 2px 0px #0af; /* for demo purposes */
}


.halfStyle:before { /* creates the left 1/3 */
display: block;
z-index: 2;
position: absolute;
top: 0;
width: 33.33%;
content: attr(data-content); /* dynamic content for the pseudo element */
overflow: hidden;
pointer-events: none; /* so the base char is selectable by mouse */
color: #f00; /* for demo purposes */

text-shadow: 2px -2px 0px #af0; /* for demo purposes */
}

.halfStyle:after { /* creates the middle 1/3 */
display: block;
z-index: 1;
position: absolute;
top: 0;
width: 66.66%;
content: attr(data-content); /* dynamic content for the pseudo element */

overflow: hidden;
pointer-events: none; /* so the base char is selectable by mouse */
color: #000; /* for demo purposes */
text-shadow: 2px 2px 0px #af0; /* for demo purposes */
}



Single Characters:


X
Y

Z
A



Automated:



Half-style, please.






(JSFiddle demo)









-Horizontal 1/3 Parts





  • Without Text Shadow:



    halfStyle - Horizontal 1/3 Parts - No Text Shadow


  • Possibility of Text Shadow for each 1/3 part independently:



    halfStyle - Horizontal 1/3 Parts - With Text Shadow







// jQuery for automated mode
jQuery(function($) {
var text, chars, $el, i, output;

// Iterate over all class occurences
$('.textToHalfStyle').each(function(idx, el) {
$el = $(el);
text = $el.text();
chars = text.split('');


// Set the screen-reader text
$el.html('' + text + '');

// Reset output for appending
output = '';

// Iterate over all chars in the text
for (i = 0; i < chars.length; i++) {
// Create a styled element for each character and append to container
output += '';

}

// Write to DOM only once
$el.append(output);
});
});

.halfStyle { /* base char and also the bottom 1/3 */
position: relative;
display: inline-block;
font-size: 80px; /* or any font size will work */

color: transparent;
overflow: hidden;
white-space: pre; /* to preserve the spaces from collapsing */
color: #f0f;
text-shadow: 2px 2px 0px #0af; /* for demo purposes */
}

.halfStyle:before { /* creates the top 1/3 */
display: block;
z-index: 2;

position: absolute;
top: 0;
height: 33.33%;
content: attr(data-content); /* dynamic content for the pseudo element */
overflow: hidden;
pointer-events: none; /* so the base char is selectable by mouse */
color: #f00; /* for demo purposes */
text-shadow: 2px -2px 0px #fa0; /* for demo purposes */
}


.halfStyle:after { /* creates the middle 1/3 */
display: block;
position: absolute;
z-index: 1;
top: 0;
height: 66.66%;
content: attr(data-content); /* dynamic content for the pseudo element */
overflow: hidden;
pointer-events: none; /* so the base char is selectable by mouse */
color: #000; /* for demo purposes */

text-shadow: 2px 2px 0px #af0; /* for demo purposes */
}


Single Characters:


X
Y
Z
A




Automated:



Half-style, please.





(JSFiddle demo)










-HalfStyle Improvement By @KevinGranger



halfStyle - KevinGranger





// jQuery for automated mode

jQuery(function($) {
var text, chars, $el, i, output;

// Iterate over all class occurences
$('.textToHalfStyle').each(function(idx, el) {
$el = $(el);
text = $el.text();
chars = text.split('');

// Set the screen-reader text

$el.html('' + text + '');

// Reset output for appending
output = '';

// Iterate over all chars in the text
for (i = 0; i < chars.length; i++) {
// Create a styled element for each character and append to container
output += '';
}


// Write to DOM only once
$el.append(output);
});
});

body {
background-color: black;
}

.textToHalfStyle {

display: block;
margin: 200px 0 0 0;
text-align: center;
}

.halfStyle {
font-family: 'Libre Baskerville', serif;
position: relative;
display: inline-block;
width: 1;

font-size: 70px;
color: black;
overflow: hidden;
white-space: pre;
text-shadow: 1px 2px 0 white;
}

.halfStyle:before {
display: block;
z-index: 1;

position: absolute;
top: 0;
width: 50%;
content: attr(data-content); /* dynamic content for the pseudo element */
overflow: hidden;
color: white;
}


Single Characters:


X

Y
Z
A



Automated:



Half-style, please.






(JSFiddle demo)








-PeelingStyle improvement of HalfStyle by @SamTremaine



halfStyle - SamTremaine






// jQuery for automated mode
jQuery(function($) {
var text, chars, $el, i, output;

// Iterate over all class occurences
$('.textToHalfStyle').each(function(idx, el) {
$el = $(el);

text = $el.text();
chars = text.split('');

// Set the screen-reader text
$el.html('' + text + '');

// Reset output for appending
output = '';

// Iterate over all chars in the text

for (i = 0; i < chars.length; i++) {
// Create a styled element for each character and append to container
output += '';
}

// Write to DOM only once
$el.append(output);
});
});

.halfStyle {

position: relative;
display: inline-block;
font-size: 68px;
color: rgba(0, 0, 0, 0.8);
overflow: hidden;
white-space: pre;
transform: rotate(4deg);
text-shadow: 2px 1px 3px rgba(0, 0, 0, 0.3);
}


.halfStyle:before { /* creates the left part */
display: block;
z-index: 1;
position: absolute;
top: -0.5px;
left: -3px;
width: 100%;
content: attr(data-content);
overflow: hidden;
pointer-events: none;

color: #FFF;
transform: rotate(-4deg);
text-shadow: 0px 0px 1px #000;
}


Single Characters:


X
Y
Z
A




Automated:



Half-style, please.





(JSFiddle demo and on samtremaine.co.uk)











Customized different Half-Style style-sets can be used on desired elements on the same page.
You can define multiple style-sets and tell the plugin which one to use.



The plugin uses data attribute data-halfstyle="[-CustomClassName-]" on the target .textToHalfStyle elements and makes all the necessary changes automatically.




So, simply on the element containing the text add textToHalfStyle class and data attribute data-halfstyle="[-CustomClassName-]". The plugin will do the rest of the job.



halfStyle - Multiple on Same Page



Also the CSS style-sets' class definitions match the [-CustomClassName-] part mentioned above and is chained to .halfStyle, so we will have .halfStyle.[-CustomClassName-]





jQuery(function($) {

var halfstyle_text, halfstyle_chars, $halfstyle_el, halfstyle_i, halfstyle_output, halfstyle_style;

// Iterate over all class occurrences
$('.textToHalfStyle').each(function(idx, halfstyle_el) {
$halfstyle_el = $(halfstyle_el);
halfstyle_style = $halfstyle_el.data('halfstyle') || 'hs-base';
halfstyle_text = $halfstyle_el.text();
halfstyle_chars = halfstyle_text.split('');

// Set the screen-reader text

$halfstyle_el.html('' + halfstyle_text + '');

// Reset output for appending
halfstyle_output = '';

// Iterate over all chars in the text
for (halfstyle_i = 0; halfstyle_i < halfstyle_chars.length; halfstyle_i++) {
// Create a styled element for each character and append to container
halfstyle_output += '';
}


// Write to DOM only once
$halfstyle_el.append(halfstyle_output);
});
});

/* start half-style hs-base */

.halfStyle.hs-base {
position: relative;
display: inline-block;

font-size: 80px; /* or any font size will work */
overflow: hidden;
white-space: pre; /* to preserve the spaces from collapsing */
color: #000; /* for demo purposes */
}

.halfStyle.hs-base:before {
display: block;
z-index: 1;
position: absolute;

top: 0;
width: 50%;
content: attr(data-content); /* dynamic content for the pseudo element */
pointer-events: none; /* so the base char is selectable by mouse */
overflow: hidden;
color: #f00; /* for demo purposes */
}

/* end half-style hs-base */



/* start half-style hs-horizontal-third */

.halfStyle.hs-horizontal-third { /* base char and also the bottom 1/3 */
position: relative;
display: inline-block;
font-size: 80px; /* or any font size will work */
color: transparent;
overflow: hidden;
white-space: pre; /* to preserve the spaces from collapsing */

color: #f0f;
text-shadow: 2px 2px 0px #0af; /* for demo purposes */
}

.halfStyle.hs-horizontal-third:before { /* creates the top 1/3 */
display: block;
z-index: 2;
position: absolute;
top: 0;
height: 33.33%;

content: attr(data-content); /* dynamic content for the pseudo element */
overflow: hidden;
pointer-events: none; /* so the base char is selectable by mouse */
color: #f00; /* for demo purposes */
text-shadow: 2px -2px 0px #fa0; /* for demo purposes */
}

.halfStyle.hs-horizontal-third:after { /* creates the middle 1/3 */
display: block;
position: absolute;

z-index: 1;
top: 0;
height: 66.66%;
content: attr(data-content); /* dynamic content for the pseudo element */
overflow: hidden;
pointer-events: none; /* so the base char is selectable by mouse */
color: #000; /* for demo purposes */
text-shadow: 2px 2px 0px #af0; /* for demo purposes */
}


/* end half-style hs-horizontal-third */


/* start half-style hs-PeelingStyle, by user SamTremaine on Stackoverflow.com */

.halfStyle.hs-PeelingStyle {
position: relative;
display: inline-block;
font-size: 68px;
color: rgba(0, 0, 0, 0.8);

overflow: hidden;
white-space: pre;
transform: rotate(4deg);
text-shadow: 2px 1px 3px rgba(0, 0, 0, 0.3);
}

.halfStyle.hs-PeelingStyle:before { /* creates the left part */
display: block;
z-index: 1;
position: absolute;

top: -0.5px;
left: -3px;
width: 100%;
content: attr(data-content);
overflow: hidden;
pointer-events: none;
color: #FFF;
transform: rotate(-4deg);
text-shadow: 0px 0px 1px #000;
}


/* end half-style hs-PeelingStyle */


/* start half-style hs-KevinGranger, by user KevinGranger on StackOverflow.com*/

.textToHalfStyle.hs-KevinGranger {
display: block;
margin: 200px 0 0 0;
text-align: center;

}

.halfStyle.hs-KevinGranger {
font-family: 'Libre Baskerville', serif;
position: relative;
display: inline-block;
width: 1;
font-size: 70px;
color: black;
overflow: hidden;

white-space: pre;
text-shadow: 1px 2px 0 white;
}

.halfStyle.hs-KevinGranger:before {
display: block;
z-index: 1;
position: absolute;
top: 0;
width: 50%;

content: attr(data-content); /* dynamic content for the pseudo element */
overflow: hidden;
color: white;
}

/* end half-style hs-KevinGranger



Half-style, please.




Half-style, please.



Half-style, please.



Half-style, please.







(JSFiddle demo)


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