jQuery Helpers

01) jQuery to round off decimal values

To round off decimal values using jQuery, we can use the built-in JavaScript methods toFixed() or toPrecision().

The toFixed() method converts a number into a string, keeping a specified number of decimals

var iNum = 12345.6789;
iNum.toFixed();    // Returns "12346": note rounding, no fractional part
iNum.toFixed(1);   // Returns "12345.7": note rounding
iNum.toFixed(6);   // Returns "12345.678900": note added zeros

The toPrecision() method formats a number to a specified length.

var iNum = 5.123456;
iNum.toPrecision();    // Returns 5.123456
iNum.toPrecision(5);   // Returns 5.1235
iNum.toPrecision(2);   // Returns 5.1
iNum.toPrecision(1);   // Returns 5

But then you will be wondering how toPrecision() is different from toFixed()? Well, they are different.toFixed() gives you a fixed number of decimal places, whereas the other gives you a fixed number of significant digits.

var iNum = 15.667;
iNum.toFixed(2);        // Returns "15.67"
iNum.toPrecision(2);    // Returns "16"
iNum.toPrecision(3);    // Returns "15.7"

Reference Click Here

02 Grouping Controls for Radio and Checkbox

Radio Box (in Label write for=”id_of_radio“)

<fieldset>
<legend>Output format</legend>
  <div>
    <input type="radio" name="format" id="txt" value="txt" checked>
    <label for="txt">Text file</label>
  </div>
  <div>
    <input type="radio" name="format" id="csv" value="csv">
    <label for="csv">CSV file</label>
  </div>
  […]
</fieldset>

Checkbox (in Label write for=”id_of_radio“)

<fieldset>
<legend>I want to receive</legend>
	<div>
		<input type="checkbox" name="newsletter" id="check_1">
                <label for="check_1">The weekly newsletter</label>
	</div>
	[…]
</fieldset>