[JS] Find a included string
String.includes(substr, pos) returns true or false when the String includes the word.
String.includes(substr, pos) returns true or false when the String includes the word.
Below multiple liens of strings with “” are not correct syntax in JS.
If you see Error: Expected the reducer to be a function.
This sample shows that how to define a custom HTML docuemnt using window.customElements.
An example code shows that returns boolean value when string contains numberic values (Integer) using regular expression.