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How Can I Reliably Find and Bold Specific Text Within a jQuery Element?
How Can I Reliably Find and Bold Specific Text Within a jQuery Element?
Dec 09, 2024 am 09:53 AM
Modifying Text Elements with jQuery: Find and Embolden
In jQuery, it's common to manipulate DOM elements dynamically. One such task involves finding specific text within a given element and modifying its appearance, such as bolding it.
Consider the following code:
$(window).load(function() {
// ADD BOLD ELEMENTS
$('#about_theresidency:contains("cross genre")').css({'font-weight':'bold'});
});
In this example, we're trying to find the text "cross genre" within the element with ID "about_theresidency" and apply CSS to make it bold. However, this approach may not yield the desired result. To understand why, let's explore an alternative solution:
var html = $('p').html();
$('p').html(html.replace(/world/gi, '<strong>$&</strong>'));
This approach uses the replace() method to identify and replace the text "world" with bold HTML tags. It's a more reliable way to find and modify specific text because:
- It targets the entire HTML content of the element, not just its direct text nodes.
- It uses a regular expression (/world/gi) to perform case-insensitive search and global replacement.
You can also create a reusable plugin to handle this functionality:
$.fn.wrapInTag = function(opts) {
var tag = opts.tag || 'strong'
, words = opts.words || []
, regex = RegExp(words.join('|'), 'gi') // Case insensitive
, replacement = '<'+ tag +'>$&</'+ tag +'>';
return this.html(function() {
return $(this).text().replace(regex, replacement);
});
};
Usage:
$('p').wrapInTag({
tag: 'em',
words: ['world', 'red']
});
This plugin allows you to easily wrap specific words within the given element with any HTML tag.
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