get the number from string javascript code example

Example 1: Javascript string to int

var myInt = parseInt("10.256"); //10
var myFloat = parseFloat("10.256"); //10.256

Example 2: js get number from string

thenum = "foo3bar5".match(/\d+/)[0] // "3"

Example 3: javascript extract number from string

// Html: <span id="foo">280ms</span>

var text = $('#foo').text();
var number = parseInt(text, 10);
alert(number);

// parseInt('ms120'.replace(/[^0-9\.]/g, ''), 10);

Example 4: string to int javascript

// Convert strings
Number('123'); // returns 123
Number('12.3'); // returns 12.3
Number('3.14someRandomStuff'); // returns NaN
Number('42px'); // returns NaN