first index of string javascript code example

Example 1: get index of first number in string javascript

var str = "Se7en";
var search = str.search(/\d/);
console.log("first digit at: ", search); // first digit at: 2

Example 2: js get first letter of string

var x = 'some string';
alert(x.charAt(0)); // alerts 's'

Example 3: javascript indexof

//indexOf getting index of array element, returns -1 if not found
var colors=["red","green","blue"];
var pos=colors.indexOf("blue");//2

//indexOf getting index of sub string, returns -1 if not found
var str = "We got a poop cleanup on isle 4.";
var strPos = str.indexOf("poop");//9