Capitalize first letter and remove space in string

Question

Got some code to capitalize the first letter of every word in a string. Can someone please help me update it so it also removes all spaces within the string once the first letters are Capped.

return function (str) {
    return str.replace(/\w\S*/g, function(txt) {
        return txt.charAt(0).toUpperCase() + txt.substr(1);
    });
}

[This](http://codereview.stackexchange.com/questions/77614/capitalize-the-first-character-of-all-words-even-when-following-a) explains how to capitalize every first letter. — Clever Programmer, Jan 18 '16 at 11:23
Possible duplicate of [Capitalize the first letter of string in JavaScript](http://stackoverflow.com/questions/1026069/capitalize-the-first-letter-of-string-in-javascript) — Universal Electricity, Jan 18 '16 at 11:48

jcubic · Accepted Answer · 2018-10-18T14:42:04.233

5

Try this:

var input = 'lorem ipsum dolor sit amet';
// \w+ mean at least of one character that build word so it match every
// word and function will be executed for every match
var output = input.replace(/\w+/g, function(txt) {
  // uppercase first letter and add rest unchanged
  return txt.charAt(0).toUpperCase() + txt.substr(1);
}).replace(/\s/g, '');// remove any spaces

document.getElementById('output').innerHTML = output;

<div id="output"></div>

You can also use one regex and one replace:

var input = 'lorem ipsum dolor sit amet';
// (\w+)(?:\s+|$) mean at least of one character that build word
// followed by any number of spaces `\s+` or end of the string `$`
// capture the word as group and spaces will not create group `?:`
var output = input.replace(/(\w+)(?:\s+|$)/g, function(_, word) {
  // uppercase first letter and add rest unchanged
  return word.charAt(0).toUpperCase() + word.substr(1);
});

document.getElementById('output').innerHTML = output;

<div id="output"></div>

edited Oct 18 '18 at 14:42

answered Jan 18 '16 at 11:16

jcubic

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Worked a treat many thanks. Decided to accept this as the answer as its a bit more thorough and ideal for other developers looking for this answer :) – Richy Jan 18 '16 at 11:44
@Richy Okay fine. Enjoy. But I gave exactly the same answer first, before, so if you think in fair, only thing I didn't do is provide a snippet. Right? I will make sure I do that from next. – Praveen Kumar Purushothaman Jan 18 '16 at 11:46
That would be good if some explanation is given, specially for regex – Kaushik Thanki Jul 16 '18 at 07:42
1

@KaushikThanki added comments – jcubic Jul 16 '18 at 11:14
Doesn't handle preceding white space. Add ".trim()" before the ".replace()" function if needed. – Asher Garland Sep 03 '19 at 15:24

Praveen Kumar Purushothaman · Answer 2 · 2016-01-18T11:14:13.290

1

You can use a simple helper function like:

return function (str) {
    return str.replace(/\w\S*/g, function(txt) {
        return txt.charAt(0).toUpperCase() + txt.substr(1);
    }).replace(/\s/g, "");
}

edited Jan 18 '16 at 11:14

answered Jan 18 '16 at 11:12

Praveen Kumar Purushothaman

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score 0 · Answer 3 · answered Jan 18 '16 at 12:07

0

Page has a nice example of how to capitalize each word in a string in JavaScript: http://alvinalexander.com/javascript/how-to-capitalize-each-word-javascript-string

answered Jan 18 '16 at 12:07

Pawan Prajapati

1

score 0 · Answer 4 · answered Nov 02 '18 at 00:24

0

As an alternative you can split the string on the space, capitalize each word and then join them back together again:

"pascal case".split(' ').map(word => word.charAt(0).toUpperCase() + word.substring(1) ).join('')

answered Nov 02 '18 at 00:24

JayChase

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Capitalize first letter and remove space in string

4 Answers4