how to make div size fixed code example

Example 1: fixed size body html

html {
    position: relative;
    min-width: 1024px;
    min-height: 768px;
    height: 100%;
}
<!-- Remove height 100% if needed fixed height -->

Example 2: how to make textarea fixed size

resize: none;

Example 3: how to make fixed position responsive

.responsive-div {
    position: fixed;
    width: 70vw; // vw being viewport-width, so 70% of the width of the viewport
    height: 50vh; // vh being viewport-height, so 50% of the height of the viewport
    /*works well for SVG's specifically*/
}