how to get string before a character in javascript code example

Example 1: js get string before character

var str = "JavaScript is the programming language of the Web.";

// this will return string before the word programming
var result = str.split('programming')[0]; 
// result : "JavaScript is the ";

Example 2: js get substring before character

//split string into an array and grab the first item

var streetaddress = addy.split(',')[0];