Javascript trim

javascript trim

next → ← prev JavaScript String trim() 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.

javascript trim

Note - The trim() method does not change the original string; it just removes the leading and trailing whitespace character. Syntax The syntax of trim() method is as follows: str.trim() Here, str is a String class of object that will contain the string to be trimmed. Parameters The trim() method does not have any arguments or parameters inside it. Return Value The string.trim() function returns the string after removing whitespace character from that string from the beginning and end of the string.

Examples Below 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. Test it Now Output This will return the below javascript trim after removing whitespace.

javascript trim Test it Now Output This will remove the whitespace from the end and return the string as given below.

javascript trim Test it Now Output This will remove the whitespace from the beginning and return the string as given below. Javatpoint tutorial website JavaScript offers two more functions similar to the trim() method.

javascript trim

They also used to trim the string but only from the one end, either left or right. Remember that both the functions do not change the original string; they just remove the whitespaces. • trimLeft() • trimRight() trimLeft() The trimLeft() method removes the whitespace only from the left of the string. To understand better, we can say that it removes whitespace only from the start and returns the string back without any leading whitespace character.

Syntax Test it Now Output This will remove the whitespace only from the beginning and trailing whitespace will remain the same.

See the output below: Test it Now Output This will remove the javascript trim only from the end and leading whitespace will remain the same.

See the output below: Javatpoint Services JavaTpoint offers too many high quality services. Mail us on [email protected], to get more information about given services.

javascript trim

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Syntax: str.trim() Return value: This method returns a new javascript trim, without any of the leading or the trailing white spaces. Examples for the above method are provided below: Example 1: var str = "GeeksforGeeks "; var st = str.trim(); print(st); Output: GeeksForGeeks In this example the trim() method removes all the leading and the trailing spaces in the string str. Example 2: var str = " GeeksforGeeks"; var st = str.trim(); print(st); Output: GeeksForGeeks In this example the trim() method removes all the leading and the trailing spaces in the string str.

Codes for the above method are provided below: Program 1: Output: GeeksForGeeks str.trimLeft() str.trimLeft() method is used to remove the white spaces from the start of the given string. It does not affect the trailing white spaces. Syntax: str.trimLeft() Return value: This method returns a new string, without any of the leading white spaces.

Examples for the above method are provided below: Example 1: var str = " GeeksforGeeks "; var st = str.trimLeft(); print(st); Output: GeeksForGeeks In this example the trimLeft() method removes all the leading spaces, but the trailing spaces in the string str remain javascript trim they are. Example 2: var str = " GeeksforGeeks"; var st = str.trim(); print(st); Output: GeeksForGeeks In this example the trimLeft() method removes all the leading spaces from str.

Codes for the above method are provided below: Program 1: Output: GeeksForGeeks str.trimRight() str.trimRight() method is used to remove the white spaces from the end of the given string. It does not affect the white spaces at the start of the string. Syntax: str.trimRight() Return value: This method returns a new string, without any of the trailing white spaces.

Examples for the above method are provided below: Example 1: var str = "GeeksforGeeks "; var st = str.trimRight(); print(st); Output: GeeksForGeeks In this example the trimRight() method removes all the trailing spaces from the string str. Example 2: var str = " GeeksforGeeks"; var st = str.trimRight(); print(st); Output: GeeksForGeeks In this example the trimRight() method does not remove the leading spaces from str.

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• Standard built-in objects • String • Properties • String length • Methods • String.prototype[@@iterator]() • Deprecated String.prototype.anchor() • Experimental String.prototype.at() • Deprecated String.prototype.big() • Deprecated String.prototype.blink() • Deprecated String.prototype.bold() • String.prototype.charAt() • String.prototype.charCodeAt() • String.prototype.codePointAt() • String.prototype.concat() • String.prototype.endsWith() • Deprecated String.prototype.fixed() • Deprecated String.prototype.fontcolor() • Deprecated String.prototype.fontsize() • String.fromCharCode() • String.fromCodePoint() • String.prototype.includes() • String.prototype.indexOf() • Deprecated String.prototype.italics() • String.prototype.lastIndexOf() • Deprecated String.prototype.link() • String.prototype.localeCompare() • String.prototype.match() • String.prototype.matchAll() • String.prototype.normalize() • String.prototype.padEnd() • String.prototype.padStart() • String.raw() • String.prototype.repeat() • String.prototype.replace() • String.prototype.replaceAll() • String.prototype.search() • String.prototype.slice() • Deprecated String.prototype.small() • String.prototype.split() • String.prototype.startsWith() • Deprecated String.prototype.strike() • Deprecated String.prototype.sub() • Deprecated String.prototype.substr() • String.prototype.substring() • Deprecated String.prototype.sup() • String.prototype.toLocaleLowerCase() • String.prototype.toLocaleUpperCase() • String.prototype.toLowerCase() • Non-Standard Deprecated String.prototype.toSource() • String.prototype.toString() • String.prototype.toUpperCase() • String.prototype.trim() • String.prototype.trimEnd() • String.prototype.trimStart() • String.prototype.valueOf() • Inheritance: • Function • Properties • Deprecated Function.arguments • Deprecated Function.caller • Non-Standard Function.displayName • Function.length • Function.name • Methods • Function.prototype.apply() • Function.prototype.bind() • Function.prototype.call() • Non-Standard Deprecated Function.prototype.toSource() • Function.prototype.toString() • Object • Properties • Object.prototype.constructor • Deprecated Object.prototype.__proto__ • Methods • Deprecated Object.prototype.__defineGetter__() • Deprecated Object.prototype.__defineSetter__() • Deprecated Object.prototype.__lookupGetter__() • Deprecated Object.prototype.__lookupSetter__() • Object.prototype.hasOwnProperty() • Object.prototype.isPrototypeOf() • Object.prototype.propertyIsEnumerable() • Object.setPrototypeOf() • Object.prototype.toLocaleString() • Non-Standard Deprecated Object.prototype.toSource() • Object.prototype.toString() • Object.prototype.valueOf() A new string representing str stripped of whitespace from both its beginning and end.

If neither the beginning or end of str has any whitespace, javascript trim new string is still returned (essentially a copy of str), with no exception being thrown. To return a new string with whitespace trimmed from just one end, use trimStart() or trimEnd(). Examples • Standard built-in objects • String • Propriedades • String length • Métodos • String.prototype[@@iterator]() • Deprecated String.prototype.anchor() • Experimental String.prototype.at() (en-US) • Deprecated String.prototype.big() • Deprecated String.prototype.blink() • Deprecated String.prototype.bold() • String.prototype.charAt() • String.prototype.charCodeAt() • String.prototype.codePointAt() • String.prototype.concat() • String.prototype.endsWith() • Deprecated String.prototype.fixed() • Deprecated String.prototype.fontcolor() • Deprecated String.prototype.fontsize() • String.fromCharCode() • String.fromCodePoint() • String.prototype.includes() • String.prototype.indexOf() • Deprecated String.prototype.italics() • String.prototype.lastIndexOf() • Deprecated String.prototype.link() • String.prototype.localeCompare() • String.prototype.match() javascript trim String.prototype.matchAll() • String.prototype.normalize() • String.prototype.padEnd() • String.prototype.padStart() • String.raw() • String.prototype.repeat() • String.prototype.replace() • String.prototype.replaceAll() • String.prototype.search() • String.prototype.slice() • Deprecated String.prototype.small() • String.prototype.split() • String.prototype.startsWith() • Deprecated String.prototype.strike() • Deprecated String.prototype.sub() • Deprecated String.prototype.substr() • String.prototype.substring() • Deprecated String.prototype.sup() • String.prototype.toLocaleLowerCase() • String.prototype.toLocaleUpperCase() • String.prototype.toLowerCase() • Non-Standard Deprecated String.prototype.toSource() • String.prototype.toString() • String.prototype.toUpperCase() • String.prototype.trim() • String.prototype.trimEnd() • String.prototype.trimStart() • String.prototype.valueOf() • Herança: • Function • Propriedades • Deprecated Function.arguments • Deprecated Function.caller • Non-Standard Function.displayName • Function.length • Function.name javascript trim Métodos • Function.prototype.apply() • Function.prototype.bind() • Function.prototype.call() • Non-Standard Deprecated Function.prototype.toSource() • Function.prototype.toString() • Object • Propriedades • Object.prototype.constructor • Deprecated Object.prototype.__proto__ • Métodos • Deprecated Object.prototype.__defineGetter__() • Deprecated Object.prototype.__defineSetter__() • Deprecated Object.prototype.__lookupGetter__() • Deprecated Object.prototype.__lookupSetter__() • Object.prototype.hasOwnProperty() • Object.prototype.isPrototypeOf() • Object.prototype.propertyIsEnumerable() • Object.setPrototypeOf() • Object.prototype.toLocaleString() • Non-Standard Deprecated Object.prototype.toSource() • Object.prototype.toString() • Object.prototype.valueOf() Specification Status Comment ECMAScript 5.1 (ECMA-262) The definition of 'String.prototype.trim' in that specification.

Padrão Definição inicial. Implementado no JavaScript 1.8.1.

javascript trim

ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'String.prototype.trim' in that specification. Padrão Navegadores compatíveis
To trim leading and trailing whitespace from a string in JavaScript, you should use the String.prototype.trim() method.

The trim() method removes leading and trailing whitespace characters, including tabs and newlines. '\t Hello, World\t \n\n'.trim(); // 'Hello, World' The trim() method is especially useful with template strings, because template strings end up with leading and trailing newlines if you put ` on a separate line. const code = ` console.log('Hello, World!); `; code; // "\nconsole.log('Hello, World!);\n" code.trim(); // "console.log('Hello, World!)" Trim Arbitrary Characters To trim arbitrary characters, you should use the replace() function.

replace() takes two arguments: • a regular expression denoting what to take out • a string denoting what to put in By using ^ (start of string) and $ (end of string), you can create two javascript trim calls that replace leading and trailing instances of a character as shown below.

let example = 'aaaaaaaaaaaaaaaaaaaaBBBaaaaaaaaaaaaaaaaaaaa'; example.replace( /^a+/, '').replace( /a+$/, ''); // BBB Trim Multiple Characters To trim multiple characters, broaden the javascript trim of the regular expression. let example = '1234567890 Mastering JS 1234567890'; example.replace( /^[0-9]+/, '').replace( /[0-9]+$/, ''); // Mastering JS example.replace( /[0-9]+/, ''); // Mastering JS trimStart() and trimEnd() JavaScript strings also have trimStart() and trimEnd() methods.

javascript trim

The trimStart() function removes all leading whitespace, and trimEnd() removes all trailing whitespace. In other words, str.trimStart().trimEnd() is equivalent to str.trim(). let str = ' hello world '; str.trimStart(); // 'hello world ' str.trimEnd(); // ' hello world' Keep in mind that trimStart() and trimEnd() are relatively new additions to JavaScript, introduced in ES2019. They are not supported in Node.js before v10.x, and they are not supported in any version of Internet Explorer.

While they are safe to use in Node.js, you may want to add a polyfill for browser apps if you need to support IE. View more jobs! More Fundamentals Tutorials • Empty Objects are Truthy in JavaScript?

javascript trim How to Merge Two Objects in JavaScript • The firstChild Property in JavaScript • The document.createElement Function in JavaScript • String replaceAll() in JavaScript • Get A Character from a String in JavaScript • Add to the Front of an Array in JavaScript
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