How to make text bold,italic and underline using jquery

Question

I have three checkboxes and a textbox now If I write something in textbox and check the bold checkbox the text should appear with bold effect and similarly italic and underline

Answer 1

You can do that using simple CSS and a little jQuery code.

1.First define your cascading style sheet classes

<style type="text/css">
.bold {
 font-weight:bold;
}
.italic {
font-style:italic;
}
.underline {
    text-decoration: underline;
}
</style>

2.Load jQuery

<script type="text/javascript" src="jquery.js"></script>

3.Write the function for switching the classes

<script type="text/javascript">
$(document).ready(function () {
    $('.selector').click(function () {
        var checked = $(this).is(':checked');
        var value = $(this).attr('value');
        if(checked) {
            $('#box').addClass(value);
        } else {
            $('#box').removeClass(value);
        }
    });     

});
</script>

5.Modified html

Bold:<input class='selector' type="checkbox" value="bold"/>
Italic:<input class='selector' type="checkbox" value="italic"/>
Underline:<input class='selector' type="checkbox" value="underline"/>
<br>
<input id="box" type="text" value="">
<br>

jsfiddle link: http://jsfiddle.net/deepumohanp/t2wKP/

Answer 2

Text inside of an input cannot be formatted this way. You can try and fake it with an editable div.

<div contenteditable></div>

And use jQuery on that.

Answer 3

You can do the following:

<form>
    Bold:<input name="textStyle" type="checkbox" value="bold"/>
    Italic:<input name="textStyle" type="checkbox" value="italic"/>
    Underline:<input name="textStyle" type="checkbox" value="underline"/>

    <input name="styledText" type="text" value="">
</form>

<script type="text/javascript">
    $('input[name="textStyle"]').change(function(){
        if ($(this).val() == 'bold'){
            if ($(this).is(':checked')) $('input[name="styledText"]').css('font-weight', 'bold');
            else $('input[name="styledText"]').css('font-weight', 'normal');
        }
        else if ($(this).val() == 'italic'){
            if ($(this).is(':checked')) $('input[name="styledText"]').css('font-style', 'italic');
            else $('input[name="styledText"]').css('font-style', 'normal');
        }
        else if ($(this).val() == 'underline'){
            if ($(this).is(':checked')) $('input[name="styledText"]').css('text-decoration', 'underline');
            else $('input[name="styledText"]').css('text-decoration', 'none');
        }
    });
</script>

Fiddle here: http://jsfiddle.net/tyfsf/

Hope it helps!