uni-app WebGL版本2无法获取上下文

uni-app WebGL版本2无法获取上下文

产品分类：uniapp/App

PC开发环境操作系统：Mac

PC开发环境操作系统版本号：11.5.2 (20G95)

HBuilderX类型：正式

HBuilderX版本号：3.2.16

手机系统：Android

手机系统版本号：Android 8.0

手机厂商：华为

手机机型：mate10

页面类型：vue

vue版本：vue2

打包方式：云端

项目创建方式：HBuilderX

示例代码：

<template>
<view>
111
<button @click="sss">444</button>
<button @click="sss2">222</button>
<button @click="sss">444</button>
<button @click="sss">444</button>
<button @click="sss">444</button>
<button @click="sss">444</button>
</view>
</template>

<script>
import * as tf from '@tensorflow/tfjs';

export default {  
    data() {  
        return {  

        }  
    },  
    methods: {  
        sss(){  
            console.log('ok1')  
            // Define a model for linear regression.   
            const model = tf.sequential();   
            model.add(tf.layers.dense({units: 1, inputShape: [1]}));  

            model.compile({loss: 'meanSquaredError', optimizer: 'sgd'});  

            // Generate some synthetic data for training.   
            const xs = tf.tensor2d([1, 2, 3, 4], [4, 1]);   
            const ys = tf.tensor2d([1, 3, 5, 7], [4, 1]);  

            // Train the model using the data.   
            model.fit(xs, ys, {epochs: 10}).then(() => {   
                // Use the model to do inference on a data point the model hasn't seen before:   
                model.predict(tf.tensor2d([5], [1, 1])).print();  
                 // Open the browser devtools to see the output   
                 console.log('ok')  
                 });  
        },  
        sss2(){  
            console.log('ok1');  
            const a = tf.variable(tf.scalar(Math.random()));  
            const b = tf.variable(tf.scalar(Math.random()));  
            const c = tf.variable(tf.scalar(Math.random()));  
            const d = tf.variable(tf.scalar(Math.random()));  
            function predict(x) {  
              // y = a * x ^ 3 + b * x ^ 2 + c * x + d  
              return tf.tidy(() => {  
                return a.mul(x.pow(tf.scalar(3))) // a * x^3  
                  .add(b.mul(x.square())) // + b * x ^ 2  
                  .add(c.mul(x)) // + c * x  
                  .add(d); // + d  
              });  
            };  
            function loss(predictions, labels) {  
              // 将labels（实际的值）进行抽象  
              // 然后获取平均数.  
              const meanSquareError = predictions.sub(labels).square().mean();  
              return meanSquareError;  
            };  
            const learningRate = 0.5;  
            const optimizer = tf.train.sgd(learningRate);  
            function train(xs, ys, numIterations = 75) {  

              const learningRate = 0.5;  
              const optimizer = tf.train.sgd(learningRate);  

              for (let iter = 0; iter < numIterations; iter++) {  
                optimizer.minimize(() => {  
                  const predsYs = predict(xs);  
                  return loss(predsYs, ys);  
                });  
              };  
              };  
        }  
    }  
}
```

## 操作步骤：
运行到内置模拟器中

## 预期结果：
应该是GL渲染到图片

## 实际结果：
发生报警，没有显示

## bug描述：
在运行tensorflowjs时会有报警
Could not get context for WebGL version 2