Here i will discuss to add a function in string object using prototype, so can access every where in application.
As we know that prototype is super object in javascript.
String.prototype.checkExist = function (charStr) {
const str = this.valueOf();
let exitsCheck = false;
const strArr = charStr.split('');
for (let i = 0; i < strArr.length; i++) {
if (str.includes(strArr[i])) {
exitsCheck = true;
break;
}
}
return exitsCheck;
}
In above function checkExist function will check that a character exist in a string or not,if exists the return true other wise return false.
Reference: https://jsfiddle.net/u6BER/
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