如何使用 JavaScript 从字符串中删除空格？

Question

How to remove spaces in a string? For instance:

Input:

'/var/www/site/Brand new document.docx'

Output:

'/var/www/site/Brandnewdocument.docx'

Answer 1

This?

str = str.replace(/\s/g, '');

Example

 var str = '/var/www/site/Brand new document.docx'; document.write( str.replace(/\s/g, '') );

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Update: Based on this question , this:

str = str.replace(/\s+/g, '');

is a better solution. It produces the same result, but it does it faster.

The Regex

\s is the regex for "whitespace", and g is the "global" flag, meaning match ALL \s (whitespaces).

A great explanation for + can be found here .

As a side note, you could replace the content between the single quotes to anything you want, so you can replace whitespace with any other string.

Answer 2

 var a = b = " /var/www/site/Brand new document.docx "; console.log( a.split(' ').join('') ); console.log( b.replace( /\s/g, '') );

Two ways of doing this!

Answer 3

SHORTEST and FASTEST : str.replace(/ /g, '');

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Benchmark:

Here my results - (2018.07.13) MacOs High Sierra 10.13.3 on Chrome 67.0.3396 (64-bit), Safari 11.0.3 (13604.5.6), Firefox 59.0.2 (64-bit) ):

SHORT strings

Short string similar to examples from OP question

The fastest solution on all browsers is / /g (regexp1a) - Chrome 17.7M (operation/sec), Safari 10.1M, Firefox 8.8M. The slowest for all browsers was split-join solution. Change to \s or add + or i to regexp slows down processing.

LONG strings

For string about ~3 milion character results are:

• regexp1a : Safari 50.14 ops/sec, Firefox 18.57, Chrome 8.95
• regexp2b : Safari 38.39, Firefox 19.45, Chrome 9.26
• split-join : Firefox 26.41, Safari 23.10, Chrome 7.98,

You can run it on your machine: https://jsperf.com/remove-string-spaces/1

Answer 4

["

Following @rsplak answer: actually, using split\/join way is faster than using regexp.<\/i>

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Answer 5

easy way

someString.replace(/ /g, '');
// or
someString.replace(/\s/gm, '');

Answer 6

var input = '/var/www/site/Brand new document.docx';

//remove space
input = input.replace(/\s/g, '');

//make string lower
input = input.toLowerCase();

alert(input);

Click here for working example

Answer 7

您还可以使用 JS 的最新字符串方法之一： replaceAll

'/var/www/site/Brand new document.docx'.replaceAll(' ', '');

Answer 8

Without regexp , it works fine.

input = input.replace(' ', '');

Why not use simply this !? This is faster as simple !

Answer 9

  var output = '/var/www/site/Brand new document.docx'.replace(/ /g, ""); 
    or
  var output = '/var/www/site/Brand new document.docx'.replace(/ /gi,"");

Note: Though you use 'g' or 'gi' for removing spaces both behaves the same.

If we use 'g' in the replace function, it will check for the exact match. but if we use 'gi', it ignores the case sensitivity.

for reference click here .

Answer 10

Regex + Replace()

Although regex can be slower, in many use cases the developer is only manipulating a few strings at once so considering speed is irrelevant. Even though / / is faster than /\s/, having the '\s' explains what is going on to another developer perhaps more clearly.

let string = '/var/www/site/Brand new document.docx';
let path = string.replace(/\s/g, '');
// path => '/var/www/site/Brandnewdocument.docx'

Split() + Join()

Using Split + Join allows for further chained manipulation of the string.

let string = '/var/www/site/Brand new document.docx';
let path => string.split('').map(char => /(\s|\.)/.test(char) ? '/' : char).join('');
// "/var/www/site/Brand/new/document/docx";

Answer 11

Using replaceAll seems like the simplest cleanest way. (I can't vouch for fastest)

'/var/www/site/Brand new document.docx'.replaceAll(' ', '')

See docs .

The replaceAll() method returns a new string with all matches of a pattern replaced by a replacement. The pattern can be a string or a RegExp, and the replacement can be a string or a function to be called for each match.

Answer 12

Easiest way to remove spaces from the string is use replace in this way

let str = '/var/www/site/Brand new document.docx';
let result = str.replace(/\s/g, '');

Answer 13

 var str = '/var/www/site/Brand new document.docx'; document.write( str.replace(/\s\/g, '') ); ----------

Answer 14

You can use regex to remove spaces from string`

let str = '/var/www/site/Brand new document.docx';
let result = str.replace(/\s/g, '');

Answer 15

Although there are ways to use regex to remove spaces, there is a simple function that can remove all whitespace called .trim(); :

var str = "abr a cadab ra";
str = str.trim();
//str = "abracadabra"

Answer 16

your_string = 'Hello world';
words_array = your_tring.split(' ');

string_without_space = '';

for(i=0; i<words_array.length; i++){
    new_text += words_array[i]; 
}

console.log("The new word:" new_text);

The output:

HelloWorld