offsetHeight, clientHeight, scrollHeight 란 무엇입니까?

offsetHeight, clientHeight, scrollHeight 란 무엇입니까?

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차이점이 무엇인지 설명의 생각 offsetHeight, clientHeight그리고 scrollHeight나 offsetWidth, clientWidth그리고 scrollWidth?

클라이언트 측에서 작업하기 전에이 차이점을 알아야합니다. 그렇지 않으면 그들의 삶의 절반이 UI 수정에 소비됩니다.

바이올린 또는 인라인 아래 :

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>

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차이점을 이해하려면 상자 모델 을 이해해야 하지만 기본적으로 다음과 같습니다.

clientHeight :

패딩을 포함하지만, 화소의 요소의 내부 높이를 반환 하지 수평 스크롤바 높이 , 보더 또는 마진

offsetHeight :

is a measurement which includes the element borders, the element vertical padding, the element horizontal scrollbar (if present, if rendered) and the element CSS height.

scrollHeight:

is a measurement of the height of an element's content including content not visible on the screen due to overflow

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I will make it easier:

Consider:

<element>                                     
    <!-- *content*: child nodes: -->        | content
    A child node as text node               | of
    <div id="another_child_node"></div>     | the
    ... and I am the 4th child node         | element
</element>                                    

scrollHeight: ENTIRE content & padding (visible or not)
_{Height of all content + paddings, despite of height of the element.}

clientHeight: VISIBLE content & padding
_{Only visible height: content portion limited by explicitly defined height of the element.}

offsetHeight: VISIBLE content & padding + border + scrollbar
_{Height occupied by the element on document.}

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* offsetHeight is a measurement in pixels of the element's CSS height, including border, padding and the element's horizontal scrollbar.

* clientHeight property returns the viewable height of an element in pixels, including padding, but not the border, scrollbar or margin.

* scrollHeight value is equal to the minimum height the element would require in order to fit all the content in the viewport without using a vertical scrollbar. The height is measured in the same way as clientHeight: it includes the element's padding, but not its border, margin or horizontal scrollbar.

Same is the case for all of these with width instead of height.

참고URL : https://stackoverflow.com/questions/22675126/what-is-offsetheight-clientheight-scrollheight