The Element Object | script

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Edit get_container_w

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const element = document.getElementById("container"); let text = "H: " + element.offsetHeight + " px | ";

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text += "W: " + element.offsetWidth + " px"; document.getElementById("hw_size").innerHTML = text;
sc variables: h=”” w=”” mrg=”” pd=”” brd=”” bcol=””

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The inside container background color is a css root color variable : root {--blue:lightblue;} #container {background-color:var(--blue);}