@tensorflow/tfjs
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Package description
@tensorflow/tfjs is an open-source hardware-accelerated JavaScript library for training and deploying machine learning models. It allows you to develop machine learning models in JavaScript and use them in the browser or on Node.js.
Creating and Training Models
This code demonstrates how to create a simple neural network model, compile it, and train it using synthetic data. The model is then used for inference.
const tf = require('@tensorflow/tfjs');
// Define a simple model
const model = tf.sequential();
model.add(tf.layers.dense({units: 100, activation: 'relu', inputShape: [10]}));
model.add(tf.layers.dense({units: 1, activation: 'linear'}));
// Compile the model
model.compile({optimizer: 'sgd', loss: 'meanSquaredError'});
// Generate some synthetic data for training
const xs = tf.randomNormal([100, 10]);
const ys = tf.randomNormal([100, 1]);
// Train the model
model.fit(xs, ys, {epochs: 10}).then(() => {
// Use the model for inference
model.predict(tf.randomNormal([1, 10])).print();
});Loading Pre-trained Models
This code demonstrates how to load a pre-trained model from a URL and use it for inference on an image. The image is preprocessed to match the input requirements of the model.
const tf = require('@tensorflow/tfjs');
// Load a pre-trained model from a URL
const modelUrl = 'https://storage.googleapis.com/tfjs-models/tfjs/mobilenet_v1_0.25_224/model.json';
tf.loadGraphModel(modelUrl).then(model => {
// Use the model for inference
const img = tf.browser.fromPixels(document.getElementById('image'));
const resizedImg = tf.image.resizeBilinear(img, [224, 224]);
const input = resizedImg.expandDims(0).toFloat().div(tf.scalar(127)).sub(tf.scalar(1));
model.predict(input).print();
});Tensor Operations
This code demonstrates basic tensor operations such as addition. Tensors are the core data structure in TensorFlow.js, and you can perform various mathematical operations on them.
const tf = require('@tensorflow/tfjs');
// Create tensors
const a = tf.tensor([1, 2, 3, 4]);
const b = tf.tensor([5, 6, 7, 8]);
// Perform tensor operations
const c = a.add(b);
c.print(); // Output: [6, 8, 10, 12]Brain.js is a JavaScript library for neural networks. It is simpler and more beginner-friendly compared to TensorFlow.js, but it is less powerful and flexible. Brain.js is suitable for smaller projects and simpler neural network tasks.
Synaptic is a JavaScript neural network library for node.js and the browser. It provides a wide range of neural network architectures and is relatively easy to use. However, it does not offer the same level of performance and hardware acceleration as TensorFlow.js.
ml5.js is a high-level library built on top of TensorFlow.js, designed to make machine learning accessible to artists, creative coders, and students. It provides a simplified API for common machine learning tasks, making it easier to use but less flexible for advanced users.
Readme
TensorFlow.js is an open-source hardware-accelerated JavaScript library for training and deploying machine learning models.
Develop ML in the Browser
Use flexible and intuitive APIs to build models from scratch using the low-level
JavaScript linear algebra library or the high-level layers API.
Run Existing models
Use TensorFlow.js model converters to run pre-existing TensorFlow models right
in the browser.
Retrain Existing models
Retrain pre-existing ML models using sensor data connected to the browser, or
other client-side data.
This repository contains the logic and scripts that combine two packages:
If you care about bundle size, you can import those packages individually.
Check out our examples repository and our tutorials.
See these release notes for how to migrate from deeplearn.js to TensorFlow.js.
There are two main ways to get TensorFlow.js in your JavaScript project: via script tags or by installing it from NPM and using a build tool like Parcel, WebPack, or Rollup.
Add the following code to an HTML file:
<html>
<head>
<!-- Load TensorFlow.js -->
<script src="https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@0.8.0"> </script>
<!-- Place your code in the script tag below. You can also use an external .js file -->
<script>
// Notice there is no 'import' statement. 'tf' is available on the index-page
// because of the script tag above.
// Define a model for linear regression.
const model = tf.sequential();
model.add(tf.layers.dense({units: 1, inputShape: [1]}));
// Prepare the model for training: Specify the loss and the optimizer.
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).then(() => {
// Use the model to do inference on a data point the model hasn't seen before:
// Open the browser devtools to see the output
model.predict(tf.tensor2d([5], [1, 1])).print();
});
</script>
</head>
<body>
</body>
</html>
Open up that html file in your browser and the code should run!
Add TensorFlow.js to your project using yarn or npm. Note: Because
we use ES2017 syntax (such as import), this workflow assumes you are using a bundler/transpiler
to convert your code to something the browser understands. See our
examples
to see how we use Parcel to build
our code. However you are free to use any build tool that you prefer.
import * as tf from '@tensorflow/tfjs';
// Define a model for linear regression.
const model = tf.sequential();
model.add(tf.layers.dense({units: 1, inputShape: [1]}));
// Prepare the model for training: Specify the loss and the optimizer.
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).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();
});
See our tutorials, examples and documentation for more details.
We support porting pre-trained models from:
TensorFlow.js is a part of the TensorFlow ecosystem. For more info:
FAQs
Unknown package
We found that @tensorflow/tfjs demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 10 open source maintainers collaborating on the project.
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