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How to limit the display size of images in JavaScript_javascript skills

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Release: 2016-05-16 16:10:23
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The example in this article describes how to limit the display size of images using JavaScript. Share it with everyone for your reference. The specific implementation method is as follows:

/**
 * 限制图片显示的size.
 * 
 * @param thisobj 图片组件
 * @param limitW 限制宽度大小
 * @param limitH 限制高度大小
 */
function imageResize(thisobj, limitW, limitH) {
  var newW;
  var newH;
  if (thisobj.width > limitW) {
    newW = limitW;
    newH = parseInt(thisobj.height * newW / thisobj.width);
 // 按宽度比例缩放
    if (newH > limitH) {
      newH = limitH;
      newW = parseInt(thisobj.width * newH / thisobj.height);
    }
    thisobj.width = newW;
    thisobj.height = newH;
  } else if (thisobj.height > limitH) {
    newH = limitH;
    newW = parseInt(thisobj.width * newH / thisobj.height);
    thisobj.width = newW;
    thisobj.height = newH;
  }
}
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I hope this article will be helpful to everyone’s JavaScript programming design.

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