an i remove border from input field code example

Example 1: how to remove the outer border of an input text in html

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

Example 2: how to remove form border after click input

.from_Input{
    border: none;
    outline:none;
}
.from_Input:active{
    border: none;
    outline:none;
}