Format lowercased string to capitalize the begining of each sentence

Question

I have a string like

FIRST SENTENCE. SECOND SENTENCE.

I want to lowercase the string in that way to capitalize the first letter of each sentence.

For example:

string = string.toLowerCase().capitalize();

only the first sentence is capitalized.

I have the

String.prototype.capitalize = function() { return this.charAt(0).toUpperCase() + this.slice(1); }

function

Does anyone know how to solve?

score 10 · Accepted Answer · edited Jul 14 '16 at 10:53

10

If you only want to capitalize the first word of each sentence (not every word), then use this function:

function applySentenceCase(str) {
    return str.replace(/.+?[\.\?\!](\s|$)/g, function (txt) {
        return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();
    });
}

JSFiddle here

If you want to keep the formatting of the rest of the sentence and just capitalize the first letters, change txt.substr(1).toLowerCase() to txt.substr(1)

edited Jul 14 '16 at 10:53

JsAndDotNet

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answered Dec 07 '13 at 13:45

r3mainer

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And what is tha difference if I use replace(/\w\S*/g, function (txt) instead of your code? Thank you. – zsola3075457 Dec 07 '13 at 13:51
1

@zsola3075457 That would put a capital letter at the beginning of *every* word: http://jsfiddle.net/VAKk8/1/ – r3mainer Dec 07 '13 at 13:54
1

Use `/.+?([\.\?\!]\s|$)/g` to make it work for single/ending sentences without punctuation as well – Bjørn Egil Aug 21 '17 at 23:50
function applySentenceCase(str) { return str.toLowerCase().replace(/(^.|\.\s.|\!\s.|\?\s.)/g, function (txt) { return txt.toUpperCase(); }); } – Ovidiu Badita Dec 18 '17 at 09:22

score 4 · Answer 2 · edited May 23 '17 at 12:01

4

Try this

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

alert(toTitleCase('FIRST SENTENCE. SECOND SENTENCE.'))

DEMO

With Reference

edited May 23 '17 at 12:01

Community

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answered Dec 07 '13 at 13:37

Satpal

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John · Answer 3 · 2018-12-10T14:53:59.020

This JS function will apply sentence case to the initial sentence and any sentences that follow a sentence that ends with . ? !

function applySentenceCase(str) {
    var txt = str.split(/(.+?[\.\?\!](\s|$))/g);
    for (i = 0; i < (txt.length-1); i++) {
        if (txt[i].length>1){
            txt[i]=txt[i].charAt(0).toUpperCase() + txt[i].substr(1).toLowerCase();
        } else if (txt[i].length==1) {
            txt[i]=txt[i].charAt(0).toUpperCase();
        }
    }
    txt = txt.join('').replace(/\s\s/g,' ');
    return txt;
}

alert(applySentenceCase("LOREM IPSUM DOLOR SIT AMET, CONSECTETUR ADIPISCING ELIT. sed congue hendrerit risus, ac viverra magna elementum in. InTeRdUm Et MaLeSuAdA fAmEs Ac AnTe IpSuM pRiMiS iN fAuCiBuS. phasellus EST purus, COMMODO vitae IMPERDIET eget, ORNARE quis ELIT."));

kushal jain · Answer 4 · 2013-12-07T13:51:35.143

0

I think this will work for you

<a style="cursor:pointer;" onclick="capitaliseFirstLetter('hey wassup baby')">asd</a>

<div type="text" id="texts"></div>

Javascript

    function capitaliseFirstLetter(string)
{
    var array = string.split(" ");
    for(i=0;i<array.length;i++){
        var n = array[i];
        var a = n.charAt(0).toUpperCase() + n.slice(1);
        alert(a);
    }

}

visit : http://jsfiddle.net/rVnFU/

edited Dec 07 '13 at 13:51

answered Dec 07 '13 at 13:30

kushal jain

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1
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Sorry, I have forgot, but I already have this function, this capitalize only the first sentence. – zsola3075457 Dec 07 '13 at 13:38

Format lowercased string to capitalize the begining of each sentence

4 Answers4

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