let validateImage = (pathImg) =>{ ////判斷圖片地址是否有效
let ImgObj = new Image();
ImgObj.src = pathImg;
if(ImgObj.fileSize > 0 || (ImgObj.width > 0 && ImgObj.height > 0)) {
return true;
} else {
return false;
}
}
使用 Promise改寫為同步
let validateImage = (pathImg) => {
return new Promise((resolve, reject) => {
var ImgObj = new Image(); //判斷圖片地址是否有效
ImgObj.src = pathImg;
ImgObj.onload = ( res) => {
resolve(res);
}
ImgObj.onerror = (err) => {
reject(err)
}
})
}
//調(diào)用
validateImage (pathImg).then(()=>{
//success
}).catch(()=>{
//fail
})
