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How to Get Selected Value in Dropdown List using JavaScript? <select id="dropdown-id"> <option value="html">HTML</option> <option value="css">CSS</option> <option value="js">JavaScript</option> </select> selectedElement. value; SelectElement. optionsselectedElement. selectedIndex. value;

The <button> tag defines a clickable button. Inside a <button> element you can put text (and tags like <i> , <b> , <strong> , <br> , <img> , etc.).

In order to pre-select an item on the drop down list you can do so prior to the page being rendered by adding a selected="selected" attribute inside the required option.

The <select> tag creates dropdown lists; <option> tags define selectable values. The default value of the select element can be set by using the 'selected' attribute on the required option. This is a boolean attribute. The option that is having the 'selected' attribute will be displayed by default on the dropdown list.

Here is an example of how to create a select box in JavaScript: var select = document. createElement("select"); select.id = "mySelect"; var option1 = document. createElement("option"); option1. value = "value1"; option1. text = "Option 1"; select. appendChild(option1); var option2 = document. option2.

How to Get Selected Value in Dropdown List using JavaScript? <select id="dropdown-id"> <option value="html">HTML</option> <option value="css">CSS</option> <option value="js">JavaScript</option> </select> selectedElement. value; SelectElement. optionsselectedElement. selectedIndex. value;

To select a <select> element, you use the DOM API like getElementById() or querySelector() . How it works: First, select the <button> and <select> elements using the querySelector() method. Then, attach a click event listener to the button and show the selected index using the alert() method when the button is clicked.

Function addOption(){ var select = document. getElementById("dynamic-select"); select. optionsselect. options. length = new Option('New Element', '0'); } function removeOption(){ var select = document. getElementById("dynamic-select"); select. optionsselect. options. length - 1 = null;

In JavaScript, you can use square brackets notation to access object properties dynamically. Here's an example: ```javascript. const obj = { name: "John", age: 30. }; const propertyName = "name"; console.log(objpropertyName); // Output: John.