Tips for selectively applying CSS to elements within a specific block

How can I apply a specific CSS style only to elements within a certain block?

<body>
<p>greem green zero</p>
<span> hello </span>
<div id="main">
...more tags...
</div>
<ul><li>1233</li></ul>
...
</body>

I need to apply the file.css style only to the tags inside the div:id block = "main", without affecting anything outside of this block where there are many other styled elements.

Could using an iframe be a solution?

Answer ā„–1

Is this what you're looking for? No need to embed an iframe, simply utilize CSS selectors.

Check out this link for an example

body p {
    color: green;
}

#main {
    color: red;
}

Answer ā„–2

There are three different approaches you can take for handling this issue:

  • Opting to use an <iframe/>. Personally, I would steer clear of this option.
  • Delving into manual CSS processing with JavaScript. It's quite a heavy task! But it's possible that there are existing libraries or frameworks out there that could assist with this.
  • Ensuring that the selectors in file.css are sufficiently specific, such as using #main p {...} instead of just p {...}.

In most scenarios, refining the selectors tends to be the most effective solution.

Answer ā„–3

Custom HTML Example

<p>grass is green</p>
<span> good day </span>
<div id="primary">
    <div id="contentInPrimary">random text goes here </div>
    <p id="textInsidePrimary">sample paragraph</p>
</div>
<ul><li>4567</li></ul>

Personalized CSS Styling

body{
    background-color: pink;
}
#main{
    font-size: 18px;
}

To see it in action, visit this link: http://jsfiddle.net/uksuumbh/

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