I am uploading multiple images and before I upload I want to get the width and height of each image. The problem is that my function only returns the width and height of the first image only. Here's my code:

async getWidthAndHeight(files: any) {
    const newPromise = [files].map((file: any, i: any) => {
      return new Promise((resolve, reject) => {
        var reader = new FileReader();
        reader.readAsDataURL(file[i]);
        reader.onload = async (e: any) => {
          var image = new Image();
          image.src = e.target.result;
          image.onload = async () => {
            this.imageWidth = image.width;
            this.imageHeight = image.height;
            this.sizeObj = {
              width: this.imageWidth,
              height: this.imageHeight
            };
            resolve(this.sizeObj)
          }
        }
      })
    })
    const final = await Promise.all(newPromise);
    return final
  }

The return value is an array with the dimensions of the first image alone. I want the function to return the dimensions of all images. Any help would be greatly appreciated. Thanks!

CodePudding user response：

Considering your files as FileList use this to create array of promises and use file instead of file[i]

const newPromise = Array.from(files).map(file => {
  console.log(file);
  // your code
});