A polyfill is a piece of code (usually JavaScript on the Web) used to provide modern functionality on older browsers that do not natively support it. To know more, talk2us@ideas2it.com or visit www.ideas2it.com

2. JavaScript is notorious for having cross-browser
compatibility issues.
A polyfill is a piece of code (usually
JavaScript on the Web) used to provide modern
functionality on older browsers that do not
natively support it.
One example of a polyfill is the code below
which is a polyfill for the new ES6 String
method startsWith():
if (!String.prototype.startsWith) {
String.prototype.startsWith = function (searchString,
position) {
position = position || 0;
return this.substr(position, searchString.length)
=== searchString;
};
}

3. Another example of a polyfill is for get values
from Object.
if (!Object.prototype.values) {
Object.prototype.values = function (obj) {
var values = Object.keys(obj).map(function(e) {
return obj[e];
});
return values;
};
}
Now you have the power to hack the browser to
support the missing features.
Load Polyfills Only When Needed. We can include
polyfills in a separate file, we can add it as a
dependency in projects.