获取图片长宽
方法1:
let url ="图片地址";
function imageSize(url) {
return new Promise(function (resolve, reject) {
let image = new Image();
image.onload = function () {
resolve({
width: image.width,
height: image.height
});
};
image.onerror = function () {
reject(new Error('error'));
};
image.src = url;
});
}
(async () => {
let vh = await imageSize(url);
})();
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