How to get image size (height & width) using JavaScript?

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忘了有多久
忘了有多久 2020-11-21 05:23

Are there any JavaScript or jQuery APIs or methods to get the dimensions of an image on the page?

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  •  天涯浪人
    2020-11-21 05:47

    just pass the img file object which is obtained by the input element when we select the correct file it will give the netural height and width of image

    function getNeturalHeightWidth(file) {
         let h, w;
         let reader = new FileReader();
          reader.onload = () => {
            let tmpImgNode = document.createElement("img");
            tmpImgNode.onload = function() {
              h = this.naturalHeight;
              w = this.naturalWidth;
            };
            tmpImgNode.src = reader.result;
          };
          reader.readAsDataURL(file);
        }
       return h, w;
    }
    

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