I'm changing a database using phpmyadmin with several html pages inside it and I would like to remove, from all these pages, all the <div> and other tags that contain a certain class or id.
Example:
Case 1
<div class="undesirable">
<div class="container">
<div class="row">
<div class="col1"></div>
</div>
</div>
</div>
Case 2
<div class="undesirable">
<div class="container">
<div class="row">
<div class="col1"></div>
<div class="col2"></div>
</div>
</div>
</div>
i would like to remove all <div> that contain the class="undesirable". In some cases, there is still the possibility of appearing as class="pre_undesirable", or something similar.
Initially I thought of using regex, but as there are variations in htmls, code breaks are occurring, as there is no way to know when the <\div> will end.
Possibly the answer would be HTML parser, but I can't understand how to use it. Any indication of where to start?
Since you are dealing with html, you probably should use an html parser and search for the removal target using xpath. To demonstrate, I'll change your html a bit:
$original=
'<html><body>
<div class="undesirable">
<div class="container">
<div class="row">
<div class="col1"></div>
</div>
</div>
</div>
<div class="keepme">
<div class="container">
<div class="row">
<div class="col1"></div>
<div class="col2"></div>
</div>
</div>
</div>
<div class="pre_undesirable">
<div class="container">
<div class="row">
<div class="col1"></div>
<div class="col2"></div>
</div>
</div>
</div>
<div class="keepme">
<div class="container">
<div class="row">
<div class="col1"></div>
<div class="col2"></div>
</div>
</div>
</div>
</body>
</html>
';
$HTMLDoc = new DOMDocument();
$HTMLDoc->loadHTML($original);
$xpath = new DOMXPath($HTMLDoc);
$targets = $xpath->query('//div[contains(#class,"undesirable")]');
foreach($targets as $target){
$target->parentNode->removeChild($target);
}
echo $HTMLDoc->saveHTML();
The output should include only the two "keep me" <div>s.
We can make use D3JS to remove or append any the HTML elements by class name or id.
We can make use of Select() and Selectall() for the selection of the particular elements in the HTML. Incase if we want to append any div tag use append('div') to insert the div for the data.
<script>
function remove()
{
d3.select(.undesirable)
.selectAll("li")
.exit()
.remove()
}
</script>
Related
Suppose I have a block of code that looks like this.
<div class="lv1">
<div class="lv2">
<div class="img">
</div>
<div id="text-on-image"> // <-- I want to grab this div element.
</div>
</div>
<div class="lv2">
</div>
</div>
Now I have $(this).eq(0) which refers to the root div element.
<div class="lv1"> //<-- $(this).eq(0) is here.
<div class="lv2">
<div class="img">
</div>
<div id="text-on-image">
</div>
</div>
<div class="lv2">
</div>
</div>
$(this).eq(0).children().eq(0) now refers to first div of lv2 class div.
<div class="lv1">
<div class="lv2"> // <-- $(this).eq(0).children().eq(0) is here
<div class="img">
</div>
<div id="text-on-image">
</div>
</div>
<div class="lv2">
</div>
</div>
$(this).eq(0).children().eq(0).children().eq(1) now refers to the correct div I want.
<div class="lv1">
<div class="lv2">
<div class="img">
</div>
<div id="text-on-image"> // <-- $(this).eq(0).children().eq(0).children().eq(1) is here
</div>
</div>
<div class="lv2">
</div>
</div>
Notice how the selecting child node became very messy for my code.
"$(this).eq(0).children().eq(0).children().eq(1)"
Is there a better way to go about doing the same work?
Use:
$("#parent").find(".children") for all children (deep traverse)
or:
$("#parent").children(".children") for immediate children
Since you use an ID, and an ID must be unique - simply use $("#text-on-image")
Otherwise, use the .find() Method.
If you used id, you can select it right away.
$("#text-on-image")
id must be unique, so if you use class, you can use ".find()"
$(".lv1").find(".text-on-image")
If no id or class is specified, selectors can be used.
$(".lv1 > .lv2 > div:nth-child(2)")
I started to use BEM methodology and i have a question according to this.
Example:
<div class="container">
<div class="container__block-1">
<h1 class="container-title">block1</h1>
</div>
<div class="container__block-2">
<h1 class="container__title container-title">block2</h1>
</div>
<div class="container__block-3">
<h1 class="container__title container-title">block3</h1>
</div>
</div>
How you can see i use: container__title element in block 2 and in block3. I need this to add different margin and padding for h1.
Question: Can i use the same element in container__block-2 and container__block-3 according to BEM methodology?
It is okay to use the same element for another block as long as you want to have the same properties of the above blocks.
However, incase you need a variation, that's when the modifier comes into role.
whenever you need to make a change in only a particular element from a group of elements, you use a modifier there. It is denoted as block__element--modifier.
<div class="container">
<div class="container__block-1">
<h1 class="container-title">block1</h1>
</div>
<div class="container__block-2">
<h1 class="container__title container__title--modifier1 ">block2</h1>
</div>
<div class="container__block-3">
<h1 class="container__title container__title--modifier2">block3</h1>
</div>
</div>
For different variants of same class, u can use --
<div class="container">
<div class="container__block-1">
<h1 class="container-title">block1</h1>
</div>
<div class="container__block-2">
<h1 class="container__title container__title--1">block2</h1>
</div>
<div class="container__block-3">
<h1 class="container__title container__title--2">block3</h1>
</div>
</div>
Is it a good idea to use ID in a bootstrap .col which is in a .row? I read somewhere that you should only have columns under .row . Example:
<div class="container">
<div class="row">
<div id="style1" class="col-12">
</div>
<div id="style2" class="col-12">
</div>
</div>
</div>
or should I make seperate div tags:
<div class="container">
<div class="row">
<div class="col-12">
<div id="style1">
</div>
</div>
<div class="col-12">
<div id="style2">
</div>
</div>
</div>
</div>
It doesn't really matter: The reason why you shouldn't you use an ID for a particular element usually is that you would like to use the CSS applied to that ID more than once: In this case you should use a class instead of an ID.
But if you are sure you will use those settings only once (or if you don't use any CSS for that ID but only want to be able to address that one element via Javascript/jQuery), you can use an ID.
I am using bootstrap to put 2 elements on the same row. However, I am having difficulties getting it to work. Here is what I am inputting:
<div class="container">
<div class="row">
<div class="col-xs-12">
<div>$</div>
<div class="refundNumber">12345</div>
</div>
</div>
</div>
And it outputs:
$
12345
I want it to be:
$12345
I cant simply put the "$" with the numbers because I will be using JS to count up the numbers from zero on a specific event. It doesn't work with the "$" present.
Thank you in advance for helping a beginner!
<div>s are block-level elements that start on new lines. If you want them to be on the same line, you have to make them inline-block or inline elements.
Edit: Using <span> would be the appropriate solution in your case:
Change:
<div>$</div>
<div class="refundNumber">12345</div>
To:
<span>$</span>
<span class="refundNumber">12345</span>
Like "Dov Benyomin" answered, except apply ascii character to ensure compatibility.
<div class="col-xs-12">
<span>$</span>
<span class="refundNumber">12345</span>
</div>
There are multiple ways to do this :
.text{display:inline-block;}
<link href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/>
<!--Use span tags -->
<div class="row">
<div class="col-xs-12">
<span>$</span>
<span class="refundNumber text">12345</span>
</div>
</div>
<span>OR</span>
<!--Best method use display:inline -->
<div class="row">
<div class="col-xs-12">
<div class="text">$</div>
<div class="refundNumber text">12345</div>
</div>
</div>
<span>OR</span>
<!-- Using col classes of bootstrap -->
<div class="row">
<div class="col-xs-12">
<div class="col-xs-1">$</div>
<div class="refundNumber">12345</div>
</div>
</div>
Like Micheal pointed out, use ASCII codes. ("& #36;" for "$")
I would like to select only the p tag without any attributes from the following html code.
<div id="review">
<div class="partial_review">
<div class="1">.....</div>
<div class="2">
<div class='inner_Bubble'>
<div class="entry">
<p class="partial_entry>it was a good...</p>
</div>
</div>
</div>
</div>
<div class="full_review">
<div class="1">.....</div>
<div class="2">
<div class='inner_Bubble'>
<div class="entry">
<p>it was a good trip.</p>
</div>
</div>
</div>
</div>
</div>
I have tried //div[#class='entry']/p[not class = 'partial_entry']/text(). But, its not working.
If you want all p elements with no attributes at all then the simplest path would be
//p[not(#*)]
If you want to check for the absence of class specifically then
//p[not(#class)]