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  Angular Change Event : The (change) is a DOM event fires when changes to the form fields like <input> , <select> , and <textarea> are committed by the user.   Video  tutorial  :   https://youtu.be/qou1SDN_m2Y  This Event Fires When : ·        user changes the input & moves the focus away from the text box (blur event) ·        On <select> it fires when the user selects a new option either by a mouse click or using a keyboard. ·         Fires when the state of a check box or radio button change due to users action   Change Event Example : The following example shows how to use the change event in Angular. [app.component.html] <label> Enter a Text  </label> <input   class = "textInput"   type = "text"   (change) = "changeHandler($event)"   />   [app.component.ts] export   class   AppComponent  {    changeHandler ( args ) {      console . log ( ar

Learn how to add and remove a class name to an element with angular   We can able to add and remove a class to an element in angular. In the following example, we have added/removed a class for the input element using a button component.   Example :   Video  tutorial :   https://youtu.be/vMM05geNQJ4   [app.component.html] <input   class = "myInput"   type = "text"   value = "subscribe for more videos"   /> <br   /> <button   (click) = "addClass()"   class = "button" > Add Class </button> <button   (click) = "romveClass()"   class = "button" > Remove Class </button>   [app.component.css] .myInput  {    font-weight :  bold ; } .inputStyle  {    width :  300px ;    color :  coral ;    border-radius :  5px ;    height :  25px ;    padding :  3px ; } .button  {    color :  aliceblue ;    backgrou

  HTML DOM Document addEventListener()   The addEventListener() method  allows you to add event listeners on any HTML DOM object such as HTML elements, the HTML document, the window object, or other objects that support events, like the xmlHttpRequest object.   Example : Video  tutorial :  https://youtu.be/80yHjjWJeC4 [index.html] <input   id = "inputElement"   type = "text"   value = "Example" /> <button   id = "buttonElement" > Update </button>   [script.js] document . getElementById ( 'buttonElement' ). addEventListener ( 'click' , function (){    var   InputEle  =  document . getElementById ( 'inputElement' );    InputEle . value  =  'subscribe for more videos' ; });   Sample : https://stackblitz.com/edit/js-qghp6q?file=index.html&file=index.js