v3: Issue loading T5-Small with webgpu backend about transformers.js HOT 2 OPEN

// default empty function
static async getInstance(progress_callback = ()=>{}) {}

// default console log
static async getInstance(progress_callback = (x)=>console.log(x)) {}

class GeneratorSingleton {
    static model_id = 'Xenova/t5-small';
    static model = null;
    static tokenizer = null;

    static async getInstance(progress_callback = (x) => console.log(x)) {
        if (!this.tokenizer) {
            this.tokenizer = AutoTokenizer.from_pretrained(this.model_id);
        }

        if (!this.model) {
            env.backends.onnx.wasm.wasmPaths = 'https://cdn.jsdelivr.net/npm/[email protected]/dist/';
            env.backends.onnx.wasm.numThreads = 1;

            this.model = AutoModelForSeq2SeqLM.from_pretrained(this.model_id, {
                dtype: 'fp32',
                device: 'webgpu',
                progress_callback,
            });
        }

        progress_callback({ status: 'ready' });

        return Promise.all([this.tokenizer, this.model]);
    }
}