SOLVED: Which of the following is NOT one of the three testing phases of a JavaScript application? a) trying to make the application fail b) using the W3C Markup Validation Service to validate the HTML c) testing the application with valid data d) testing the application with invalid data

HTML in Hindi – HTML क्या है? उदाहरण, इसके प्रकार को जानें - Tutorial in Hindi

<form>: The Form element - HTML | MDN

CSS là gì? | TopDev