function javascript first letter code example
Example 1: js get first letter of string
var x = 'some string';
alert(x.charAt(0)); // alerts 's'
Example 2: js get words first letter
var str = "Java Script Object Notation";
var matches = str.match(/\b(\w)/g); // ['J','S','O','N']
var acronym = matches.join(''); // JSON
console.log(acronym)