TypeError: Cannot read properties of undefined (reading 'hasAlphaChannel')

[quater23]

TIFFImageryProvider/packages/TIFFImageryProvider/src/TIFFImageryProvider.ts

Line 361 in 18c4015

static async fromUrl(url: string | File | Blob, options?: TIFFImageryProviderOptions) {

When i use this code to load tiff, it is error.
code:

const provider = await TIFFImageryProvider.fromUrl(url);
viewer.imageryLayers.addImageryProvider(provider);

error info:

Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'hasAlphaChannel')
at new TIFFImageryProvider (TIFFImageryProvider.ts:172:36)
at TIFFImageryProvider.<anonymous> (TIFFImageryProvider.ts:362:22)
at Generator.next (<anonymous>)
at tslib.es6.js:121:71
at new Promise (<anonymous>)
at __awaiter (tslib.es6.js:117:12)
at TIFFImageryProvider.fromUrl (TIFFImageryProvider.ts:361:87)

The reason for the error is that i didn't pass in options, so it is undefined , but the TIFFImageryProvider function need its attributes.

static async fromUrl(url: string | File | Blob, options?: TIFFImageryProviderOptions) {
    const provider = new TIFFImageryProvider(options);
    await provider._build(url, options)
    
    return provider;
  }

so may be you can change the source code like this:

static async fromUrl(url: string | File | Blob, options?: TIFFImageryProviderOptions) {
    if(options === undefined){
     options = {};
   }
    const provider = new TIFFImageryProvider(options);
    await provider._build(url, options)
    
    return provider;
  }

[quater23]

version: "tiff-imagery-provider": "^2.6.5",

[hongfaqiu]

ts报错是因为TIFFImageryProvider没有完全扩展ImageryProvider的属性，这样写就没事了：

const provider: any = await TIFFImageryProvider.fromUrl(url);
viewer.imageryLayers.addImageryProvider(provider);

[quater23]

ok，但我用的是js，一开始按照文档上那样写就报错了，后来改成这样就可以:

const provider = await TIFFImageryProvider.fromUrl(url, {});

也许你可以在文档上标注一下😃

[hongfaqiu]

感谢，已修复