Question

i am trying to validate text(Paragraph) in javascript for multiline Textbox.
After giving the text in textbox, the very first Letter should be changed to Capital letter, remaining have to remain as small letters.After full stop the first letter should be in Capital. I need to use textchange event also.

I am new to javascript, and i feel this Proper Case validation is very complex, i am not even getting any logic to start with.. Plz give some idea.

Thanks in advance.

Answer 1

Here’s a possible answer, though to reiterate my comment, I don’t actually think this is a very useful validation approach. You can see a working version here: http://jsfiddle.net/nrabinowitz/5TSK5/

// regex for a single sentence
var testRE = /^[A-Z][^A-Z]+$/;

var paragraphs = text.split('\n');

var pass, paragraph, sentences, sentence;
for (var x=0; x < paragraphs.length; x++) {
    paragraph = paragraphs[x];
    pass = true;
    if (paragraph) {
        sentences = paragraph.split(/\. +/);
        for (var y=0; y < sentences.length; y++) {
            sentence = sentences[y];
            // test sentence for validity
            if (sentence && !testRE.exec(sentence)) {
                pass = false;  
            }
        }
        // pass is now either true or false for paragraph x
    }
}