I need to put a span around the last two characters within a div.
The current structure looks like this:
<div id="price">3199</div>
I need to output something like this:
<div id="price">31<span id="smaller">99</span></div>
It's for a price in a dynamic HTML5 banner ad. I need the ability to format the final two characters smaller than the first two, but the integer from the dynamic feed is simply 3199 or 2099 etc. etc.
I've found some jQuery solutions but I need this to be plain JavaScript.
This fiddle solves it well with jQuery, and I'm sure it doesn't need much tweaking to work without jQuery but my javascript skills can't quite crack it.
You can use replace() with regex .{2}$
var ele=document.getElementById('price');
ele.innerHTML=ele.innerHTML.replace(/.{2}$/,'<span id="smaller">$&</span>')
#smaller{
font-size:10px;
}
<div id="price">3199</div>
Exaple using substring, not as nice as regex but works.
var str = document.getElementById('price').innerHTML;
cut = str.substring(str.length, 2);
document.getElementById('price').innerHTML = str.slice(0, -2) + '<span id="smaller">' + cut + '</span>';
#smaller{
font-size:10px;
}
<div id="price">3199</div>
Fiddle
If you already have event handlers on that HTML, you can't just reset innerHTML, you have to use a more foolproof of breaking up text nodes, using DOM manipulation.
var priceNode = document.getElementById('price');
var textNode = priceNode.firstChild;
var newTextNode = textNode.splitText(textNode.data.length - 2); // Index of where to break the text node
var span = document.createElement('span');
span.className = 'decimal';
span.appendChild(newTextNode);
priceNode.appendChild(span);
.decimal {
font-size: 50%;
}
<div id="price">3199</div>
Here's a case where innerHTML manipulation breaks an existing handler
$('.wholeamount').hover(
function(){ $(this).addClass('highlight')},
function(){ $(this).removeClass('highlight')}
);
$('button').click(function() {
var ele=document.getElementById('price');
ele.innerHTML=ele.innerHTML.replace(/.{2}$/,'<span class="decimal">$&</span>')
});
.highlight {
background-color: yellow;
}
.decimal {
font-size: 50%
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<pre>Hover over the 24 to see it highlight</pre>
<div id="price"><span class="wholeamount">24</span>.99</div> <hr />
<button>Make decimal</button>
<pre>The highlight will be gone when you manipulate innerHTML</pre>
Use slice function to edit the innerHTML
This is the cleanest way to do it.
var ele=document.getElementById('price');
ele.innerHTML = ele.innerHTML.slice(0, 2) + "<span id='smaller'>" + ele.innerHTML.slice(2) + "</span>";
Related
I am new to javascript. I was thinking getelementbyid but i don't know how to make it work
Like the title, here is what I mean
For example I have in HTML:
<p>fw_93</p>
<p>fw_94</p>
<p>fw_93</p>
So what I want is to make script to replace those fw_93 fw_94 to what I want.
For example
Instead of displaying "fw_93" I want it to display "9.3". Same with fw_94 to 9.4
Replace fw_ with nothing, divide the number by 10:
Array.prototype.forEach.call(document.getElementsByTagName('p'), function(el) {
el.innerHTML = parseInt(el.innerHTML.replace(/[A-Za-z_]*/, '')) / 10;
});
<p>fw_93</p>
<p>fw_94</p>
<p>fw_93</p>
Okay so select the tags.
Loop over the collection
read the html
match the string
replace the html
var ps = document.querySelectorAll("p");
for (var i=0; i<ps.length; i++) {
var p = ps[i];
var txt = p.innerHTML; //.textContent
var updated = txt.replace(/.+(\d)(\d)/, "$1.$2");
p.innerHTML = updated;
}
<p>fw_93</p>
<p>fw_94</p>
<p>fw_93</p>
Using JQuery
Not sure why I did it with JQuery, guess I wasn't paying enough attention. No point in me re-writing as there are already good answers in JS. Though I will leave this in case it's of use to anyone that is using JQuery.
You can loop though each <p> element and covert the contents, something like this:
$("p").each(function() {
var text = $(this).html();
var text = text.substring(text.indexOf("_") + 1);
var text = text[0] + "." + text.substring(1);
$(this).html(text);
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p>fw_93</p>
<p>fw_94</p>
<p>fw_93</p>
You may need to add validation depending on how reliable your input is.
Note that the code makes the following assumptions:
There will always be a _ followed by at least 2 digits
The . will always go after the first digit
Your HTML:
<p id="p1">init_value</p>
Your JS:
document.getElementById("p1").innerHTML = "new_value";
My demo in JS Fiddle https://jsfiddle.net/dineshkanivu/5fp2sjgb/2/
I want to add content Dynamically to the id="myNote" in its 4th line.
click the button lines , you can see total number of lines. i want to add some html content after 4th line. How can i do this using jQuery
Snippet :
$(function() {
$("#getLines").click(function() {
var myheight = $("#myNote").height();
parseFloat($("#myNote").css("line-height"));
//$('#myNote').after('<button>button</button>');
alert(myheight);
});
});
#myNote {
width: 300px;
line-height: 1;
height: auto;
text-align: justify;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="myNote">
Finally, designing the last sentence in this way has the added benefit of seamlessly moving the reader to the first paragraph of the body of the paper. In this way we can see that the basic introduction does not need to be much more than three or four
sentences in length. If yours is much longer you might want to consider editing it down a bit! Here, by way of example, is an introductory paragraph to an essay in response to the following question:
</div>
<button id="getLines">lines</button>
According to this post I wrote a little function to do this.
Surely there a more efficent way. But it works fine.
I wrap every word in an own span. After that I check the positions of all spans, get the line number and add a class with this line number to the span.
function insertTextAtLine(target,lineNumber,textInsert){
var words = target.text().split(' ');
var text = '';
$.each(words, function(i, w){
if($.trim(w)) text = text + '<span>' + w + '</span> ';
});
target.html(text);
var line = 0;
var prevTop = - parseFloat($("#myNote").css("line-height"));
$('span', target).each(function(){
var word = $(this);
var top = word.offset().top;
if(top != prevTop){
prevTop = top;
line++;
}
word.attr('class', 'line' + line);
});
var insert=$('<span />').text(textInsert);
target.find('.line'+lineNumber).first().prepend(insert);
};
Fiddle:https://jsfiddle.net/tye3czva/4/
Lets say we have a <div style="width:100px;">This text is too long to fit</div>
The text in the div is dynamic. And I'd like to force the text to fit in width and not break.
So i need some kind of functionality to test if the text is going to fit, and if it is not, then i'd like to display the portion of the text that will actually fit. And append ...to the end.
Result for a too long text should be something like this: "This text is..."
Is there some standard way of doing what i want? Either by javascript, jquery, jsp or java?
Thanks!
Edit:
Thanks for your quick and many answers! I was doing this in java by guessing how many characters would fit. It seemed like a less than optimal solution, so thats why i came here.
The css solution is perfect for me. Its not that big of a deal that it doesnt work for firefox, since my clients all use ie anyway. :)
you could do it with css3 using text-overflow:ellipsis http://www.css3.com/css-text-overflow/
or if you insist on using the js way, you can wrap the text-node inside your div and then compare the width of the wrap with the with of the parent.
If you want to process the data you can use a function:
function TextAbstract(text, length) {
if (text == null) {
return "";
}
if (text.length <= length) {
return text;
}
text = text.substring(0, length);
last = text.lastIndexOf(" ");
text = text.substring(0, last);
return text + "...";
}
text = "I am not the shortest string of a short lenth with all these cows in here cows cows cows cows";
alert(TextAbstract(text,20));
EDIT: process all div with excess length in the text:
var maxlengthwanted=20;
$('div').each(function(){
if ($('div').text().length > maxlengthwanted)
$(this).text(TextAbstract($(this).text()));
});
EDIT: More compact version to process all div with excess length in the text, breaks on space.
function textAbstract(el, maxlength = 20, delimiter = " ") {
let txt = $(el).text();
if (el == null) {
return "";
}
if (txt.length <= maxlength) {
return txt;
}
let t = txt.substring(0, maxlength);
let re = /\s+\S*$/;
let m = re.exec(t);
t = t.substring(0, m.index);
return t + "...";
}
var maxlengthwanted = 23;
$('.makeshort').each(function(index, element) {
$(element).text(textAbstract(element, maxlengthwanted, " "));
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div class="makeshort">This is a fun thing to process, modification of this is going to just be soo much fun</div>
<div class="makeshort">second This is a fun thing to process, modification of this is going to just be soo much fun</div>
<div class="makeshort">IBShort Wilson</div>
<div class="makeshort">another This is a fun thing to process, modification of this is going to just be soo much fun</div>
<div class="makeshort">more This is a fun thing to process, modification of this is going to just be soo much fun</div>
<span class="makeshort">Me also, a span that is a fun thing to process, modification of this is going to just be soo much fun</span>
<span class="makeshort">more This is a fun thing to process, modification of this is going to just be soo much fun</span>
<ul>
<li class="makeshort">li1 more This is a fun thing to process, modification of this is going to just be soo much fun</li>
<li class="makeshort">li 2 more This
is a
fun thing to process, modification of this is going to just be soo much fun</li>
<li class="makeshort">li 3 also moreThis is a fun thing to process, modification of this is going to just be soo much fun</li>
<li class="makeshort">li 4 also more This is fun thing to process, modification of this is going to just be soo much fun</li>
</ul>
if(text.length > number_of_characters) {
text = text.substring(from, to);
}
One liner using JavaScript
The below truncates the string to 10 characters with an ellipsis. If the length of the truncated string is below the limit (10 in the example below) then no ellipsis is added to the output.
const output = "abcdefghijk".split('', 10).reduce((o, c) => o.length === 9 ? `${o}${c}...` : `${o}${c}` , '');
Easiest way to shorten the variable using JavaScript:
function truncate(string, length){
if (string.length > length)
return string.substring(0,length)+'...';
else
return string;
};
Inspired by this answer: I want to truncate a text or line with ellipsis using JavaScript
If the string is a one-liner you can use the CSS solution. If its a multiline string you need to clip, i prefer using a lightweight JS plugin called cuttr.js.
Just a minimum of code needed to get it done. You could even omit the endingoption, because the three dots are the default output.
Vanilla JS implementation:
new Cuttr('.selector', {
length: 15,
ending: '...'
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/cuttr/1.3.2/cuttr.min.js"></script>
<div class="selector" style="width:100px;">This text is too long to fit</div>
jQuery implementation:
$('.selector').Cuttr({
length: 15,
ending: '...'
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/cuttr/1.3.2/cuttr.min.js"></script>
<div class="selector" style="width:100px;">This text is too long to fit</div>
Simply add a class to the div and init the plugin. You can read more about truncating a text or line with ellipsis on the plugins website or github page - there are multiple ways to clip the string, even without messing up HTML tags.
text-overflow: ellipis
div {
text-overflow: ellipsis
}
Will be supported in FireFox 7 http://caniuse.com/#search=text-overflow
If you add an id tag to the div, you can use document.getElementById("divid").innerHTML to get the contents of the div. From there, you can use .length to get the length of the string. If the length of the string is over a certain threshold, just take a substring and append a "...".
You should try to do this server-side if you can, though. Relying on Javascript/CSS to format it correctly for the user is a less than ideal solution.
Try the CSS text-overflow property.
A more likely situation is that you can't possibly know how many characters are going to fit in a dom element, given it has its own font and so on. CSS3 is not currently an option (for me anyway). So, I create a little div offscreen and keep jamming test strings into it until the width is correct:
var text = 'Try to fit this text into 100 pixels!';
var max_width = 100;
var test = document.createElement('div');
test.className = 'Same Class as your real element'; // give it the same font, etc as a normal button
test.style.width = 'auto';
test.style.position = 'absolute';
test.style.left = '-2000px';
document.body.appendChild(test);
test.innerHTML = text;
if ($(test).width() > max_width) {
for (var i=text.length; i >= 0; i--) {
test.innerHTML = text.substring(0, i) + '...';
if ($(test).width() <= max_width) {
text = text.substring(0, i) + '...';
break;
}
}
}
document.body.removeChild(test);
Basically I have a load of H1 H2 and H3 tags on a website and I want to be able to put a span around PART of these heading tags.
At the moment I have this:
jQuery(document).ready(function(){
// get all headings first
jQuery('h1, h2, h3').each(function(){
// get the text
var theHtml = jQuery(this).html();
// split by spaces
var theWords = theHtml.split(" ");
// count the words
var wordCount = theWords.length;
var newHtml;
if(wordCount < 2){
// only one word
newHtml = theHtml;
}
else if(wordCount == 2){
// word count is 2...
newHtml = theWords[0]+" <span style='color: #000'>"+theWords[1]+"</span>";
}
else {
// add the first two words:
newHtml = theWords[0]+" "+theWords[1]+" <span style='color:#000'>";
// need to loop through the array now
for(var i = 2; i<wordCount; i++){
newHtml = newHtml+theWords[i];
if(i+1 < wordCount){
newHtml = newHtml+" ";
}
}
//end
newHtml = newHtml+"</span>";
}
jQuery(this).html(newHtml);
});
});
Which works quite well. But now I have a problem which is sometimes there is an a element or a div (for an inline editor if logged in as an admin) in the titles which is breaking this...
How would I get around this? I need to potentially get all the html from the header tag, strip the HTML tags, add the span around the latter part, then put the html back in!
Any ideas?
Thank you.
Edit:
This is what the problematic html looks like:
<h1 class="entry-title"><div data-type="input" data-post_id="12" class="fee-field fee-filter-the_title">Bristish Society of Blood and Marrow Transplantation</div></h1>
And like this:
<h2 class="entry-title"><div data-type="input" data-post_id="62" class="fee-field fee-filter-the_title">About the Registry</div></h2>
But if not logged in as an administrator then the div's go away.
Hey! Nice one, I think this is possible with regular expressions. I made a quick example for you, covering the a and the div for the biggest part. All spaces that are not meant as real whitespaces (in the tags) are replaced with symbols like ___ or ---, which are changed back afterwards.
Take a look at this jsfiddle!
theHtml = theHtml.replace(/[\s]+\</gi,'<');
theHtml = theHtml.replace(/\s+[\'\"]/gi,'___');
theHtml = theHtml.replace(/[\'\"]\s+/gi,'---');
theHtml = theHtml.replace(/a\s/gi,'a_');
theHtml = theHtml.replace(/div\s/gi,'div_');
and backwards:
newHtml = newHtml.replace(/___/gi,' "');
newHtml = newHtml.replace(/---/gi,'" ');
newHtml = newHtml.replace(/div_/gi,'div ');
newHtml = newHtml.replace(/a_/gi,'a ');
COMMENT after your edit
This will not work for the example h1 and h2 you posted. This is just an idea of how to approach this. I hope this will help you! Good luck!
COMMENT2 after my own edit ;-)
It does work, I just forgot to add case insensitivity and recursivity! It's just not finished yet. There are more checks needed such as ' or " etc. Here you go, I hope this will get you on the right track.
Please use the jQuery .text() function to strip out all the text within any particular H1, H2 tags etc. Other HTML inside these tags will be ignored.
But, i'm not sure how you will restore all the Inner HTML tags back.
Have you tried jQuery's wrapInner() function? I think it does what you're looking for in just one line.
$('h1, h2, h3').wrapInner('<span></span>');
If you know what class will be in the "inner" HTML element, you can just grab that.
var outer = $('.entry-title');
var html = html.find('.fee-field');
if(html === null){
html = outer;
}
// html will either be your `h` element or your inner most element.
I was wondering if it is possible to use JavaScript to add a <div> tag around a word in an HTML page.
I have a JS search that searches a set of HTML files and returns a list of files that contain the keyword. I'd like to be able to dynamically add a <div class="highlight"> around the keyword so it stands out.
If an alternate search is performed, the original <div>'s will need to be removed and new ones added. Does anyone know if this is even possible?
Any tips or suggestions would be really appreciated.
Cheers,
Laurie.
In general you will need to parse the html code in order to ensure that you are only highlighting keywords and not invisible text or code (such as alt text attributes for images or actual markup). If you do as Jesse Hallett suggested:
$('body').html($('body').html().replace(/(pretzel)/gi, '<b>$1</b>'));
You will run into problems with certain keywords and documents. For example:
<html>
<head><title>A history of tables and tableware</title></head>
<body>
<p>The table has a fantastic history. Consider the following:</p>
<table><tr><td>Year</td><td>Number of tables made</td></tr>
<tr><td>1999</td><td>12</td></tr>
<tr><td>2009</td><td>14</td></tr>
</table>
<img src="/images/a_grand_table.jpg" alt="A grand table from designer John Tableius">
</body>
</html>
This relatively simple document might be found by searching for the word "table", but if you just replace text with wrapped text you could end up with this:
<<span class="highlight">table</span>><tr><td>Year</td><td>Number of <span class="highlight">table</span>s made</td></tr>
and this:
<img src="/images/a_grand_<span class="highlight">table</span>.jpg" alt="A grand <span class="highlight">table</span> from designer John <span class="highlight">Table</span>ius">
This means you need parsed HTML. And parsing HTML is tricky. But if you can assume a certain quality control over the html documents (i.e. no open-angle-brackets without closing angle brackets, etc) then you should be able to scan the text looking for non-tag, non-attribute data that can be further-marked-up.
Here is some Javascript which can do that:
function highlight(word, text) {
var result = '';
//char currentChar;
var csc; // current search char
var wordPos = 0;
var textPos = 0;
var partialMatch = ''; // container for partial match
var inTag = false;
// iterate over the characters in the array
// if we find an HTML element, ignore the element and its attributes.
// otherwise try to match the characters to the characters in the word
// if we find a match append the highlight text, then the word, then the close-highlight
// otherwise, just append whatever we find.
for (textPos = 0; textPos < text.length; textPos++) {
csc = text.charAt(textPos);
if (csc == '<') {
inTag = true;
result += partialMatch;
partialMatch = '';
wordPos = 0;
}
if (inTag) {
result += csc ;
} else {
var currentChar = word.charAt(wordPos);
if (csc == currentChar && textPos + (word.length - wordPos) <= text.length) {
// we are matching the current word
partialMatch += csc;
wordPos++;
if (wordPos == word.length) {
// we've matched the whole word
result += '<span class="highlight">';
result += partialMatch;
result += '</span>';
wordPos = 0;
partialMatch = '';
}
} else if (wordPos > 0) {
// we thought we had a match, but we don't, so append the partial match and move on
result += partialMatch;
result += csc;
partialMatch = '';
wordPos = 0;
} else {
result += csc;
}
}
if (inTag && csc == '>') {
inTag = false;
}
}
return result;
}
Wrapping is pretty easy with jQuery:
$('span').wrap('<div class="highlight"></div>'); // wraps spans in a b tag
Then, to remove, something like this:
$('div.highlight').each(function(){ $(this).after( $(this).text() ); }).remove();
Sounds like you will have to do some string splitting, though, so wrap may not work unless you want to pre-wrap all your words with some tag (ie. span).
The DOM API does not provide a super easy way to do this. As far as I know the best solution is to read text into JavaScript, use replace to make the changes that you want, and write the entire content back. You can do this either one HTML node at a time, or modify the whole <body> at once.
Here is how that might work in jQuery:
$('body').html($('body').html().replace(/(pretzel)/gi, '<b>$1</b>'));
couldn't you just write a selector as such to wrap it all?
$("* :contains('foo')").wrap("<div class='bar'></div>");
adam wrote the code above to do the removal:
$('div.bar').each(function(){ $(this).after( $(this).text() ); }).remove();
edit: on second thought, the first statement returns an element which would wrap the element with the div tag and not the sole word. maybe a regex replace would be a better solution here.