How to remove all spaces with jquery

jQuery is a JavaScript library that is very commonly used in front-end development. During the front-end development process, we often need to remove all spaces in the text to facilitate data processing and display. This article will introduce how to remove all spaces using jQuery.

1. Use regular expressions to remove spaces

You can use regular expressions to remove spaces in strings, including spaces, tabs, newlines, etc. In jQuery, this can be achieved using the replace() method and regular expressions.

The code is as follows:

var str = "jQuery 是一 个 JavaScript 库，它在前端开发中非常常用。";
str = str.replace(/s/g,'');
console.log(str);

The output result is:

"jQuery是一个JavaScript库，它在前端开发中非常常用。"

In the above code, regular matching s is used, which means matching spaces and tabs , newline character, g represents global replacement. Globally replace the matched spaces with the '' empty string to remove all spaces.

2. Use the jQuery trim() method

In addition to regular expressions, jQuery also provides a trim() method to remove the characters at the beginning and end of the string. Space. However, this method can only remove spaces at the beginning and end, but not the spaces in the middle.

The code is as follows:

var str = "  jQuery 是一 个 JavaScript 库，它在前端开发中非常常用。  ";
str = $.trim(str);
console.log(str);

The output result is:

"jQuery 是一 个 JavaScript 库，它在前端开发中非常常用。"

In the above code, the $.trim() method is used to remove the beginning of the string and trailing spaces.

3. Use replace() and regular expression to remove all spaces

If you want to use the replace() method regular expression to remove all spaces instead of just removing them For spaces at the beginning and end, you can change the regular expression to /s /g, which means matching all consecutive spaces.

The code is as follows:

var str = "  jQuery 是一 个 JavaScript 库，它在前端开发中非常常用。  ";
str = str.replace(/s+/g,'');
console.log(str);

The output result is:

"jQuery是一个JavaScript库，它在前端开发中非常常用。"

In the above code, regular matching s is used, which means matching at least one space. Replace all matching consecutive spaces with empty strings to remove all spaces.

Summary:

This article introduces three methods of using jQuery to remove all spaces, two of which are using the replace() method to use positive expressions, and the other one Use the $.trim() method. We can use these methods flexibly according to actual development needs to improve code efficiency and readability.

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