JavaScript/jQuery - grabbing an integer from an element's id

Question

From the following markup.

    Somewhere
    Somewher         


        

      

Answer 1

This should be the simplest way:

var id = this.id.replace(/[^\d]/g,'')*1;

It returns any digits from the ID attribute as a number (*1 does the conversion, similar to parseInt). In your example:

$("#my-div a").click(function(){
    var n = this.id.replace(/[^\d]/g,'')*1;
    alert(n);  // alerts any number in the ID attribute
    alert(typeof n) // alerts 'number' (not 'string')
});