Use jQuery loop to find and replace characters in web pages

The following jQuery code snippet demonstrates how to loop through each HTML element in a webpage and find and replace characters. Please change the value in the replacement function as needed.

jQuery('html').each(function(i){
  jQuery(this).text(jQuery(this).text().replace('需要替換的文本','替換后的文本'));
});

jQuery Find and Replace Character Loop FAQs (FAQs)

How to replace specific characters in a string with jQuery?

To use jQuery to replace specific characters in a string, you can use the replace() method. This method searches for the specified value or regular expression in the string and returns a new string where the specified value has been replaced. Here is a simple example:

var str = "Hello World!";
var res = str.replace("World", "jQuery");

In this example, "World" is replaced with "jQuery". The replace() method replaces only the first occurrence of the specified value. To replace all occurrences, you need to use a regular expression with the "g" flag (global match).

What is the difference between replaceWith() and replaceAll() in jQuery?

and replaceWith() methods in replaceAll()jQuery are used to replace matching elements, but they work slightly differently. The replaceWith() method replaces the selected element with the new content, and the replaceAll() method replaces the element matched by the specified selector.

For example, if you have two elements with IDs "old" and "new", you can replace "old" with "new" using replaceWith() as follows:

$("#old").replaceWith($("#new"));

On the other hand, to replace "new" with "old" with replaceAll(), you need to do the following:

$("#new").replaceAll("#old");

How to find and replace HTML text using jQuery?

To find and replace HTML text with jQuery, you can use the html() method with the replace() method. html() method sets or returns the content of the selected element (innerHTML). When used to set content, it overwrites the content of all matching elements.

The following is an example:

$("p").html(function(index, oldHtml){
  return oldHtml.replace("舊文本", "新文本");
});

In this example, the function takes two parameters: the index of the current element in the list and the old HTML content of the element. This function returns the new HTML content, replacing "old text" with "new text".

Can I replace multiple different characters in a string with jQuery?

Yes, you can replace multiple different characters in a string with jQuery. You can do this by linking the replace() method or using regular expressions. Here is an example of the link replace() method:

var str = "Hello World!";
var res = str.replace("Hello", "Hi").replace("World", "jQuery");

In this example, "Hello" and "World" are replaced with "Hi" and "jQuery" respectively.

How to use loop to find and replace characters in strings with jQuery?

To use a loop to find and replace characters in a string with jQuery, you can use the each() method in conjunction with the replace() method. The each() method specifies a function to run for each matching element. Here is an example:

jQuery('html').each(function(i){
  jQuery(this).text(jQuery(this).text().replace('需要替換的文本','替換后的文本'));
});

In this example, the each() method loops through each key-value pair in the replacements object, and the replace() method replaces each key in the string (oldStr) with its corresponding value (newStr). The "g" flag in the regular expression ensures that all occurrences of keys are replaced.

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