select javascript code example

Example 1: select element in js

//<div id="demo-id"></div>
var elem1 = document.getElementById("demo-id");
//<div class="demo-class"></div>
var elem2 = document.getElementsByClassName("demo-class");
//<div name="demo-name"></div>
var elem3 = document.getElementsByName("demo-name");
//<p>Some text</p>
var elem4 = document.getElementsByTagName("p");

//<div id="demo-id"></div>
var elem1 = document.querySelector("#demo-id");
//<div class="demo-class"></div>
var elem2 = document.querySelectorAll(".demo-class");
//<div name="demo-name"></div>
var elem3 = document.querySelectorAll('[name="demo-name"]');
//<p>Some text</p>
var elem4 = document.querySelectorAll("p");

Example 2: how to select div js

// Select div with class "theDiv"
document.queryselector('.theDiv');
// Select div with ID "theDiv"
document.queryselector('#theDiv');

Example 3: options in html

<form id="form">
            <label for=""></label>
            <br>
            <input type="" id="">
            <br>
            <label for=""></label>
            <br>
            <input list="browsers" name="Thenicknamey" id="Thenickname">
            <datalist id="browsers">
                <option value=""></option>
                <option value=""></option>
                <option value=""></option>
            </datalist>
            <br>
            <label for=""></label>
            <br>
            <input type="" id="">
            <br>
            <input type="" id="">
        </form>

Example 4: select html js

var elem1 = document.getElementById("demo-id");
//<div class="demo-class"></div>
var elem2 = document.getElementsByClassName("demo-class");
//<div name="demo-name"></div>
var elem3 = document.getElementsByName("demo-name");
//<p>Some text</p>
var elem4 = document.getElementsByTagName("p");

//<div id="demo-id"></div>
var elem1 = document.querySelector("#demo-id");
//<div class="demo-class"></div>
var elem2 = document.querySelectorAll(".demo-class");
//<div name="demo-name"></div>
var elem3 = document.querySelectorAll('[name="demo-name"]');
//<p>Some text</p>
var elem4 = document.querySelectorAll("p");