how to remove border of input text in html code example

Example 1: html input box no border

border-width:0px;
border:none;
outline:none;

Example 2: html remove border from textarea

textarea {
    border: none;
    background-color: transparent;
    resize: none;
    outline: none;
}

Example 3: how to remove the outer border of an input text in html

input:focus, textarea:focus, select:focus{
        outline: none;
    }