Thought of explaining what is the difference between offsetHeight, clientHeight and scrollHeight or offsetWidth, clientWidth and scrollWidth?
One must know this difference before working on the client side. Otherwise half of their life will be spent in fixing the UI.
Fiddle, or inline below:
function whatis(propType) {
var mainDiv = document.getElementById("MainDIV");
if (window.sampleDiv == null) {
var div = document.createElement("div");
window.sampleDiv = div;
}
div = window.sampleDiv;
var propTypeWidth = propType.toLowerCase() + "Width";
var propTypeHeight = propType + "Height";
var computedStyle = window.getComputedStyle(mainDiv, null);
var borderLeftWidth = computedStyle.getPropertyValue("border-left-width");
var borderTopWidth = computedStyle.getPropertyValue("border-top-width");
div.style.position = "absolute";
div.style.left = mainDiv.offsetLeft + Math.round(parseFloat((propType == "client") ? borderLeftWidth : 0)) + "px";
div.style.top = mainDiv.offsetTop + Math.round(parseFloat((propType == "client") ? borderTopWidth : 0)) + "px";
div.style.height = mainDiv[propTypeHeight] + "px";
div.style.lineHeight = mainDiv[propTypeHeight] + "px";
div.style.width = mainDiv[propTypeWidth] + "px";
div.style.textAlign = "center";
div.innerHTML = propTypeWidth + " X " + propTypeHeight + "( " +
mainDiv[propTypeWidth] + " x " + mainDiv[propTypeHeight] + " )";
div.style.background = "rgba(0,0,255,0.5)";
document.body.appendChild(div);
}
document.getElementById("offset").onclick = function() {
whatis('offset');
}
document.getElementById("client").onclick = function() {
whatis('client');
}
document.getElementById("scroll").onclick = function() {
whatis('scroll');
}#MainDIV {
border: 5px solid red;
}<button id="offset">offsetHeight & offsetWidth</button>
<button id="client">clientHeight & clientWidth</button>
<button id="scroll">scrollHeight & scrollWidth</button>
<div id="MainDIV" style="margin:auto; height:200px; width:400px; overflow:auto;">
<div style="height:400px; width:500px; overflow:hidden;">
</div>
</div>