Regex to allow only numbers JavaScript code example

Example 1: get only numbers regex javascript

var numberPattern = /\d+/g;

'something102asdfkj1948948'.match( numberPattern )

Example 2: just number regex js

// https://regex101.com/r/qyq3PG/1
// or 
/^[0-9]*$/

Example 3: number pattern js

/^[\+\-]?\d*\.?\d+(?:[Ee][\+\-]?\d+)?$/

/* 
	matched values:
    -2.14e10
    +14E-20
    42.69
*/