简单地说，您可以像这样进行测试。

  <script>
  (function($) {
        $(document).ready(function() {
            console.log("ready....");
            var i = 0;
            var img;
            for(i=1; i<13; i++) {
                img = new Image();
                img.src = 'img/' + i + '.jpg';
                console.log("name : " + img.src);
                img.onload = function() {
                    if(this.height > this.width) {
                        console.log(this.src + " : portrait");
                    }
                    else if(this.width > this.height) {
                        console.log(this.src + " : landscape");
                    }
                    else {
                        console.log(this.src + " : square");
                    }
                }
            }
        });
    }(jQuery));
  </script>

Try

函数大小(){ console.log(“宽度:${照片。宽度},高度:$ {pic.height}’); ｝ <img id="pic" src="https://picsum.photos/300/150"> <按钮onclick = "尺寸()“>显示> < /按钮大小

clientWidth和clienttheight是DOM属性，显示DOM元素内部维度的当前浏览器大小(不包括边距和边框)。在IMG元素的情况下，这将得到可见图像的实际尺寸。

var img = document.getElementById('imageid'); 
//or however you get a handle to the IMG
var width = img.clientWidth;
var height = img.clientHeight;

Use

function outmeInside() {
    var output = document.getElementById('preview_product_image');

    if (this.height < 600 || this.width < 600) {
        output.src = "http://localhost/danieladenew/uploads/no-photo.jpg";
        alert("The image you have selected is low resolution image. Your image width=" + this.width + ", height=" + this.height + ". Please select image greater or equal to 600x600. Thanks!");
    }
    else {
        output.src = URL.createObjectURL(event.target.files[0]);
    }
    return;
}



    img.src = URL.createObjectURL(event.target.files[0]);
}

这适用于多个图像预览和上传。如果你必须为每个图像逐一选择，然后复制粘贴到所有预览图像功能和验证!!

在获取元素的属性之前，文档页面应该是onload的:

window.onload = function(){
    console.log(img.offsetWidth,img.offsetHeight);
}

你只能使用load事件的回调来做到这一点，因为图像的大小直到它实际完成加载才知道。类似于下面的代码……

var imgTesting = new Image();

function CreateDelegate(contextObject, delegateMethod)
{
    return function()
    {
        return delegateMethod.apply(contextObject, arguments);
    }
}

function imgTesting_onload()
{
    alert(this.width + " by " + this.height);
}


imgTesting.onload = CreateDelegate(imgTesting, imgTesting_onload);
imgTesting.src = 'yourimage.jpg';