The JavaScript array.includes() method is used to check if an array contains a given element or not.Following is the code for the array.includes() method −Example Live Demo Document    body {       font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;    }    .sample { ... Read More

The JavaScript focus() method is used for focusing on an element only if the element can be focused.Following is the code for the JavaScript Focus() Method −Example Live Demo Document    body {       font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;    }   ... Read More

The exec() method executes the search for match and if the matched text is found in the specified string then it is returned otherwise null is returned.Following is the code for the JavaScript exec() Method −Example Document    body {       font-family: "Segoe ... Read More

The escape() function in JavaScript is used for encoding a string. It is deprecated in JavaScript 1.5.Following is the code for the JavaScript escape()Example Live Demo Document    body {       font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;    }    .sample {   ... Read More

The error name property is used for setting or getting the name of the error.Following is the code for the Error name property −Example Live Demo Document    body {       font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;    }    .sample {   ... Read More

The error message property sets or returns an error message in JavaScript. Following is the code for the error message property −Example Live Demo Document    body {       font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;    }    .sample {       ... Read More

The encodeURI() function encodes the complete URI including special characters except except (, / ? : @ & = + $ #) characters.The encodeURIComponent() function encodes some parts of the URI by basically encoding the special characters. It also encodes the following characters − (, / ? : @ & ... Read More

To get the coordinates of mouse using JavaScript, the code is as follows −Example Live Demo    body {       font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;    }    .sample {       font-size: 25px;       font-weight: 500;    } ... Read More

To convert a string to boolean in JavaScript, the code is as follows −Example Live Demo    body {       font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;    } Converting string to boolean CLICK HERE Click the above button to convert ... Read More

The JavaScript const declarations create variables that cannot be reassigned to some other value or redeclared later. It was introduced in ES2015.Following is the code for JavaScript const declaration −Example Live Demo    body {       font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;    } ... Read More