JavaScript checks whether the Sub-string is in the string method, javascript string

JavaScript checks whether the Sub-string is in the string method, javascript string

This example describes how to use JavaScript to check whether a substring is in a string. We will share this with you for your reference. The details are as follows:

var strnew="Hello Raghu How are u"//Checking existence in entire stringif(strnew.indexOf("Raghu") != -1 ){  alert("Exists");}/*Checking existence at the end of stringFor example, variable result1 in the following example is assigned the value of true because the word "Ishmael" appears at the end of the string. Variable result2 is assigned a value of false because "Raghu" doesn't appear at the end of the string.*/result1 = /Raghu$/.test("Call me Raghu");result2 = /Raghu$/.test("Call me Raghu. Some years ago");/*Checking existence in the begining of stringIn the following example, variable result1 is assigned the value of true because the word "Birds" appears at the beginning of the string. Variable result2 is assigned the value of false because "Birds" doesn't appear at the beginning of the string.*/result1 = /^Birds/.test("Birds fly");result2 = /^Birds/.test("Big Birds fly");