Wrap HTML around existing elements - javascript

This is my normal css to apply :
<h3><strong><span style="color: #3399ff;"></span></strong></h3>
I wish to apply that style above to these js elements:
$('#no_tax_price').text("$"+no_tax_price.toFixed(2));
$('#tax').text("$"+tax.toFixed(2));
$('#tax_price').text("$"+(no_tax_price+tax).toFixed(2));

If you define your styles in CSS rather than HTML, your new elements will automatically take on the styling - no JS required.
#no_tax_price, #tax, #tax_price {
font-size: 18pt;
font-weight: bold;
color: #3399ff;
}

Normally I wouldn't use <h3><strong><span> to apply styles (instead just use a single class with the right CSS properties defined), but a quick fix is to just wrap those elements around the contents of your "jQuery elements":
$('#no_tax_price, #tax, #tax_price')
.wrapInner('<h3><strong><span style="color: #3399ff;"></span></strong></h3>');

Related

Altering CSS in a dynamically generated HTML file in Node.js

There are about 20 styled articles (5-10 pages each with inconsistent sections) I need to display in my app. Without having to manually write components for each of them, we've started to export HTML from a Google Doc where they're hosted and display in an iframe. While this mostly gets what we need, there's some inconsistent styling and other changes I'd like to address.
I've started writing a JS script (node.js) that will consume all of the HTML files and try to format them correctly but having issues finding a correct library to do this.
I've tried using Jsoup, jsdoc, node-html-parser, and finally landed on cheerio.
What I'm stuck on is targeting dynamically generated classes based on their attributes and changing them. For instance, I'm trying to make changes to the superscripts in the HTML and the only thing I have to go off of is the attribute 'vertical-align'.
.c3 {
vertical-align: super;
font-size: 10pt;
}
Note that the class c3 is dynamically generated so we can't search off of that. But basically I'd want to target it and then change all of the class attributes to something like:
.c3 {
font-size: 6pt;
vertical-align: baseline;
position: relative;
top: -0.4em;
}
Does anyone have any recommendations on how to handle something like this? I have to do some more complicated things in the script like target img elements, and modify classes for those elements and their parents. Any library suggestions would be appreciated, because Jquery doesn't seem like the right tool for this.
Note: CSS is inline within the HTML file within tags
"Note: CSS is inline within the HTML file within tags"
Based on that, one way would be to loop through all elements with a style attribute using querySelectorAll, and then see if any of those with inline css contain the target style. You could then remove the inline styles and apply a class. The more you can narrow the query selector the better this will perform.
document.querySelectorAll("[style]"); all elements with a style attribute.
document.querySelectorAll("div[style]"); all div elements with a style attribute.
var elements = document.querySelectorAll("[style]");
for (let i = 0; i < elements.length; i++) {
style = elements[i].getAttribute("style");
if (style.includes("vertical-align")) {
console.log( elements[i].getAttribute("style") ); //original
elements[i].removeAttribute("style");
elements[i].classList.add("replacementClass");
console.log( elements[i].getAttribute("style") ); //empty
// or instead of a class if you want to just update the style
elements[i].setAttribute('style','font-size: 6pt; vertical-align: baseline; position: relative; top: -0.4em;');
console.log( elements[i].getAttribute("style") ); //inline
}
}
.replacementClass {
font-size: 6pt;
vertical-align: baseline;
position: relative;
top: -0.4em;
}
<span id="test" style="vertical-align: super; font-size: 10pt;">oh boy</span>
Removing the inline style might be the only way because if the inline css isn't removed it will override any classes you apply to it. You could end up with quite a few "rules" to apply based on this method though.

Can we Create CSS Selector rule with JQuery or Javascript?

we can create style or any other tag with
var st = document.createElement("style");
and even append the same to body
body.append(st);
and it will create
<body><style></style></body>
I wanna know can we put style in style tag with javascript as well not simple rules, I know there is $("selector").css() function is there which can apply css rules to selector but i want a bit more powerful rule and I want to add in style tag i just created,
something like this:
<style>
div.bar {
text-align: center;
color: red;
}
</style>
st.innerHtml or st.innerText are not letting me set these values.
Note: This was asked me to do in Browser Console only.
You can simply use jquery .text method like
const cssCode = `div.bar {
text-align: center;
color: red;
}`
$('style-tag-selector').text(cssCode)
but in my opinion, whetever your goal is - this solution is not ok. You shouldn't mess with CSS via JavaScript.
Best approach is to have styles in separately loaded .css file and then you can toggle classes to elements with javascript.
You can add your css directly within the style tag and append them to the head of your page:
$( "head" ).append( "<style>div.bar {text-align: center; color: red}</style>" );
You can append multiple style tags with css in the head beneath each other, in this way you can override previous syles, but it is not best practice.
I prefer having your styles in separate files and to manage wether or not the files will be included in your code.
Actually there's an interface for this. For example, add a style element and add a rule to it (this will result in anything with the class should-be-red to be red.
var styleElement = document.createElement('style');
document.head.appendChild(styleElement);
var sheet = styleElement.sheet;
sheet.insertRule('.should-be-red { color: red; }', 0);
You can iterate over the rules and insert/delete rules and exciting things like that.
More info: https://developer.mozilla.org/en-US/docs/Web/API/CSSStylesheet
jsbin: https://jsbin.com/jodiro/1/edit?html,js,output

Defining custom css styles for html tags

I don't do CSS and I'm not even sure what this is called so excuse the ignorance :-)
.examples {
}
.examples b {
font-weight: bold;
}
.examples p {
margin-top: 0.9em;
margin-bottom: 0.9em;
}
I'm assuming the above means any b or p tags inside a <div class='examples'> will use the styling from .examples and anything custom defined for b or p?
Can I create my own style using that convention, like this?
.examples mystyle {
}
<div class='examples'>
<div class='mystyle'>
...
UPDATE:
I want mystyle to use examples styling, but override with a black bottom border. Using .examples .mystyle the bottom border appears outside examples div, but with .examples mystyle the enclosing div looks good, but the bottom black border is gone. My apologies, so it's not working either way.
http://jsfiddle.net/SAFX/5ft9W/
Since you are using a class on the tag it would need to be a class selector and the element must be a child of .examples:
/* Notice the `.` on mystyle */
.examples .mystyle {
}
<div class="examples">
<div class='mystyle'></div>
</div>
There are several parts to a CSS style:
.examples .mystyle { /* selector */
font-weight: bold; /* This entire line is a declaration consisting of a property & value*/
}
What you seem to be asking about is the terminology to describe child elements inheritance of style from an ancestor; this is the 'cascade' of 'Cascading Style Sheets.' Not all elements inherit from their parents/ancestors (a links, notably, do not inherit the color property by default, though specifying color: inherit; in their css declaration can make them do so).
If you're asking about how to refer to the list of selectors that determine which elements are targeted by a particular rule, that is the 'selector', or 'selector expression.'
References:
CSS (from the Mozilla Developer Network, 'MDN').
Introduction to CSS 2.1 (from the W3C).
Selectors, Level 3 (from the W3C).

remove / reset inherited css from an element [duplicate]

This question already has answers here:
How to reset/remove CSS styles for a specific element or selector only
(17 answers)
Closed last month.
I know this question was asked before, but before marking it as a duplicate, I want to tell you that my situation is a little different from what I found on the internet.
I'm building and embedded script that people can put it on their sites. This script creates a div with a certain width/height and some information in it.
My problem is that some websites declare styles for div that are inherited by my div as well.
for example:
div{
background-color:red;
}
so if I don't set any background color to my div, it will show red even if I don't want that.
The only solutions I come along is to overwrite as many css proprieties, this way my div will show exactly as I want.
The problem with this solution is that there are too many css proprieties to overwrite and I want my script to be as light as it can be.
So my question is if you know another solution to my problem.
It can be in css/javascript /jQuery.
Thanks
"Resetting" styles for a specific element isn't possible, you'll have to overwrite all styles you don't want/need. If you do this with CSS directly or using JQuery to apply the styles (depends on what's easier for you, but I wouldn't recommend using JavaScript/JQuery for this, as it's completely unnecessary).
If your div is some kind of "widget" that can be included into other sites, you could try to wrap it into an iframe. This will "reset" the styles, because its content is another document, but maybe this affects how your widget works (or maybe breaks it completely) so this might not be possible in your case.
Only set the relevant / important CSS properties.
Example (only change the attributes which may cause your div to look completely different):
background: #FFF;
border: none;
color: #000;
display: block;
font: initial;
height: auto;
letter-spacing: normal;
line-height: normal;
margin: 0;
padding: 0;
text-transform: none;
visibility: visible;
width: auto;
word-spacing: normal;
z-index: auto;
Choose a very specific selector, such as div#donttouchme, <div id="donttouchme"></div>. Additionally, you can add `!important before every semicolon in the declaration. Your customers are deliberately trying to mess up your lay-out when this option fails.
You could try overwriting the CSS and use auto
I don't think this will work with color specifically, but I ran into an issue where i had a parent property such as
.parent {
left: 0px;
}
and then I was able to just define my child with something like
.child {
left: auto;
}
and it effectively "reset" the property.
Technically what you are looking for is the unset value in combination with the shorthand property all:
The unset CSS keyword resets a property to its inherited value if it inherits from its parent, and to its initial value if not. In other words, it behaves like the inherit keyword in the first case, and like the initial keyword in the second case. It can be applied to any CSS property, including the CSS shorthand all.
.customClass {
/* specific attribute */
color: unset;
}
.otherClass{
/* unset all attributes */
all: unset;
/* then set own attributes */
color: red;
}
You can use the initial value as well, this will default to the initial browser value.
.otherClass{
/* unset all attributes */
all: initial;
/* then set own attributes */
color: red;
}
As an alternative:
If possible it is probably good practice to encapsulate the class or id in a kind of namespace:
.namespace .customClass{
color: red;
}
<div class="namespace">
<div class="customClass"></div>
</div>
because of the specificity of the selector this will only influence your own classes
It is easier to accomplish this in "preprocessor scripting languages" like SASS with nesting capabilities:
.namespace{
.customClass{
color: red
}
}
Try this: Create a plain div without any style or content outside of the red div. Now you can use a loop over all styles of the plain div and assign then to your inner div to reset all styles.
Of course this doesn't work if someone assigns styles to all divs (i.e. without using a class. CSS would be div { ... }).
The usual solution for problems like this is to give your div a distinct class. That way, web designers of the sites can adjust the styling of your div to fit into the rest of the design.
As long as they are attributes like classes and ids you can remove them by javascript/jQuery class modifiers.
document.getElementById("MyElement").className = "";
There is no way to remove specific tag CSS other than overriding them (or using another element).
you may use this below option.
<style>
div:not(.no_common_style){
background-color:red;
}
</style>
now , if their any place where you do not want to apply default style you can use 'no_common_style' class as class.
ex:
<div class="no_common_style">
It will not display in red
</div>
From what I understand you want to use a div that inherits from no class but yours. As mentioned in the previous reply you cannot completely reset a div inheritance. However, what worked for me with that issue was to use another element - one that is not frequent and certainly not used in the current html page. A good example, is to use instead of then customize it to look just like your ideal would.
area { background-color : red; }
One simple approach would be to use the !important modifier in css, but this can be overridden in the same way from users.
Maybe a solution can be achieved with jquery by traversing the entire DOM to find your (re)defined classes and removing / forcing css styles.

When styling sIFR 3, When should I use JavaScript/CSS/Flash?

I'm using sifr for the first time today. I have it up and running; however, I need some help. Rather than explain, I'll show you the code below:
<div id="pullquote">“Fantastic property, facilities and location. We
couldn’t have asked for more!” <em>Mr & Mrs. Smith</em></div>
So far, so good. I have then styled that in the same document in case flash/JavaScript is disabled. No problem.
sIFR.replace(journal, {
selector: 'div#pullquote',
wmode: 'transparent',
css: [
'.sIFR-root { text-align: center; color: #be7705; font-size: 30px; background-color:#fdefd4; }',
'em { font-style: normal; color: #1d5d69; font-size: 26px; }']
});
That's what is included in my JavaScript file. Am I correct in styling the element like this? I got slightly confused with the selector, then using a second selector within js-css. Once again, there is also sifr.css. What should be included in this document? Should I be styling the element here?
I suppose my question is: What should be included, and what styling should be done in sifr-config.js and what styling should be done in sifr.css?
Thank you :)
In the CSS for the HTML page (sifr.css) you can add a style to hide the elements that sIFR will replace before does so, and you can do some tuning of the text so the text size maps better to the Flash font.
The selector parameter for sIFR.replace() is used to select the elements you wish to replace by sIFR.
The css parameter contains the CSS used inside the Flash movie. At this point, all CSS selectors are relative to the element you replaced, so if you replace an h1#foo, then you select em rather than h1#foo em. This is the only place you can style the text inside the Flash movie, aside from font size, which, if not specified here, is derived from the font size of the replaced element.

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