What is contain in JavaScript?

What is contain in JavaScript?

The contains() method returns a Boolean value indicating whether a node is a descendant of a specified node.

How do I check if a string contains a specific word in JavaScript?

The fastest way to check if a string contains a particular word or substring is with the help of String. indexOf() method. This method returns the index of the first occurrence of the specified substring inside the calling String object. If the substring or word is not found, it returns -1.

How do you use contains method?

contains(substring); The contains() method accepts one parameter: the sequence of characters for which you want to search in your string. contains() can return two possible values. If the string you have specified contains a substring, the contains() method returns true; otherwise, contains() returns false.

How list contains method in Java?

ArrayList contains() Method This method takes one object as its parameter. It checks if this object is in the ArrayList or not.It returns one boolean value. If the ArrayList contains at least one element, then it returns true. Else it returns false.

What is call apply and bind in JavaScript?

Call invokes the function and allows you to pass in arguments one by one. Apply invokes the function and allows you to pass in arguments as an array. Bind returns a new function, allowing you to pass in a this array and any number of arguments.

Can we use contains in JavaScript?

String Contains JavaScript: includes() The JavaScript includes() method, introduced in ES6, determines whether a string contains the characters you have passed into the method. If the string contains certain characters, the method will return “true.”

Are Includes case sensitive?

Case Insensitive Search Both String#includes() and String#indexOf() are case sensitive. To do case insensitive search, you can use regular expressions and the String#match() function, or you can convert both the string and substring to lower case using the String#toLowerCase() function.

How do I check if a string contains a specific words?

You can use the PHP strpos() function to check whether a string contains a specific word or not. The strpos() function returns the position of the first occurrence of a substring in a string. If the substring is not found it returns false . Also note that string positions start at 0, and not 1.

How do you check whether a string contains a substring in JavaScript?

The includes() method can be used to check whether a string contains a specified substring. It returns true if substring is present. This method is case sensitive.