code_snippet_7 for "Playing Mortal Kombat with TensorFlow.js. Transfer learning and data augmentation" translation

code_snippet_7.js

const video = document.getElementById('cam');
const Layer = 'global_average_pooling2d_1';
const mobilenetInfer = m => (p): tf.Tensor<tf.Rank> => m.infer(p, Layer);
const canvas = document.getElementById('canvas');
const scale = document.getElementById('crop');
const ImageSize = {
  Width: 100,
  Height: 56
};
navigator.mediaDevices
  .getUserMedia({
    video: true,
    audio: false
  })
  .then(stream => {
    video.srcObject = stream;
  });