How do you trim text in javascript?
Example 1Remove spaces with trim(): Show
let text = " Hello World! "; Try it Yourself » Remove spaces with replace() using a regular expression: let text = " Hello World!
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Browser Support
ES5 (JavaScript 2009) fully supported in all browsers:
This JavaScript tutorial explains how to use the string method called trim() with syntax and examples. DescriptionIn JavaScript, trim() is a string method that is used to remove whitespace characters from the start and end of a string. Whitespace characters include spaces, tabs, etc. Because the trim() method is a method of the String object, it must be invoked through a particular instance of the String class. SyntaxIn JavaScript, the syntax for the trim() method is: string.trim(); Parameters or ArgumentsThere are no parameters or arguments for the trim() method. ReturnsThe trim() method returns a string with whitespace characters removed from the start and end of the string. Note
ExampleLet's take a look at an example of how to use the trim() method in JavaScript. For example:
In this example, we have declared a variable called totn_string that is assigned the string value of 'TechOnTheNet'. We have then invoked the trim() method of the totn_string variable to remove the whitespace characters from the start and end of the string. We have written the output of the trim() method to the web browser console log, for demonstration purposes, to show what the trim() method returns. The following will be output to the web browser console log: 'TechOnTheNet' In this example, the trim() method removed the whitespace characters from the start and end of the string ' TechOnTheNet ' and returned a string value of 'TechOnTheNet'. The trim() is a built-in string function in JavaScript, which is used to trim a string. This function removes the whitespace from both the ends, i.e., start and end of the string. As the trim() is a string method, so it is invoked by an instance of the String class. We have to create an instance of String class with which the trim() method will be used. Note - The trim() method does not change the original string; it just removes the leading and trailing whitespace character.SyntaxThe syntax of trim() method is as follows: Here, str is a String class of object that will contain the string to be trimmed. ParametersThe trim() method does not have any arguments or parameters inside it. Return ValueThe string.trim() function returns the string after removing whitespace character from that string from the beginning and end of the string. ExamplesBelow are some examples, which are using trim() function to remove the elements from it. In these examples, you will see how to use this JavaScript function. So, here are a few examples - Example 1 In this example, we will pass a string containing whitespace at both ends. A good practice when using string values from form fields is to remove the whitespaces from the start and end of the strings — i.e. trim the string. In this post, I'm going to describe what is a whitespace and a line terminator character in JavaScript. Plus, you'll read how to trim strings, aka remove whitespaces and line terminator characters from the start and/or end of the string. 1. The whitespaces and line terminatorsBefore diving into the actual trim functions, let's first agree what special characters the trim functions are removing from strings. First, the whitespace is any character from the following list:
In simple words, the whitespaces are characters that rendered on the screen create an empty white space. Common whitespace characters are space Secondly, the line terminator is also a special set of characters consisting of:
The line terminator represents a character that exists at the end of a text line and has some special purpose. A common line terminator character is the line feed 2. Trim strings in JavaScriptThere are situations when you want to clean strings entering from the application input. For example, you'd definitely want to trim strings from the form fields representing a username, first name, last name, phone number, etc. JavaScript provides 3 simple functions on how to trim strings. 2.1 string.trim()
Let's see a few examples:
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The trim function removes from both ends of the string sequences of consecutive white spaces and line terminals. But if a whitespace is found in between two letters, then, of course, this whitespace is preserved:
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2.2 string.trimStart()
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2.3 string.trimEnd()
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3. ConclusionThe whitespaces, like a space or tab, are special characters that create empty space when rendered. Also the line terminals, like the line feed, you may find at the end of lines in a multiline string. Often you may find it useful to remove these special characters from a string. The JavaScript trim functions can help you.
Does JavaScript have a trim function?The trim() is a built-in string function in JavaScript, which is used to trim a string. This function removes the whitespace from both the ends, i.e., start and end of the string. As the trim() is a string method, so it is invoked by an instance of the String class.
How do you trim space between words in JavaScript?JavaScript String trim()
The trim() method removes whitespace from both sides of a string.
How do you trim the value of a string?The trim() method in Java String is a built-in function that eliminates leading and trailing spaces. The Unicode value of space character is '\u0020'. The trim() method in java checks this Unicode value before and after the string, if it exists then removes the spaces and returns the omitted string.
What trim () in string does?The Trim method removes from the current string all leading and trailing white-space characters. Each leading and trailing trim operation stops when a non-white-space character is encountered. For example, if the current string is " abc xyz ", the Trim method returns "abc xyz".
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