The end-to-end solution for building and hosting better data apps, dashboards, and reports.
count = {
let i = 0;
while (true) yield Promises.delay(1000, ++i);
}
doubleCount = count * 2
evenCount = {
yield count % 2 === 0 ? count : this;
}
counter = {
let i = 0;
while (true) {
if (i % 2 === 0) mutable counterEven = i;
if (i % 5 === 0) mutable counterFives = i;
yield Promises.delay(1000, ++i);
}
}
mutable counterEven = 0
mutable counterFives = 0
reactiveWalls
viewof reactiveWalls = {
var c = DOM.context2d(w, h);
var ball = {x: w / 2, y: h / 2, r: 8, dx: 2, dy: 2};
var wall = null;
while (true) {
ball.x += ball.dx, ball.y += ball.dy;
c.fillStyle = "black";
c.fillRect(0, 0, w, h);
c.beginPath();
c.fillStyle = "red";
c.arc(ball.x, ball.y, ball.r, 0, 2 * Math.PI);
c.fill();
if (ball.x - ball.r < 0) wall = "left", ball.dx = 2;
if (ball.x + ball.r > w) wall = "right", ball.dx = -2;
if (ball.y - ball.r < 0) wall = "top", ball.dy = 2;
if (ball.y + ball.r > h) wall = "bottom", ball.dy = -2;
c.canvas.value = wall;
yield c.canvas;
}
}
mutable wall = null
mutableWalls = {
var c = DOM.context2d(w, h);
var ball = {x: w / 2, y: h / 2, r: 8, dx: -2, dy: -2};
while (true) {
ball.x += ball.dx, ball.y += ball.dy;
c.fillStyle = "black";
c.fillRect(0, 0, w, h);
c.beginPath();
c.fillStyle = "blue";
c.arc(ball.x, ball.y, ball.r, 0, 2 * Math.PI);
c.fill();
if (ball.x - ball.r < 0) mutable wall = "left", ball.dx = 2;
if (ball.x + ball.r > w) mutable wall = "right", ball.dx = -2;
if (ball.y - ball.r < 0) mutable wall = "top", ball.dy = 2;
if (ball.y + ball.r > h) mutable wall = "bottom", ball.dy = -2;
yield c.canvas;
}
}
One platform to build and deploy the best data apps
Experiment and prototype by building visualizations in live JavaScript notebooks. Collaborate with your team and decide which concepts to build out.
Use Observable Framework to build data apps locally. Use data loaders to build in any language or library, including Python, SQL, and R.
Seamlessly deploy to Observable. Test before you ship, use automatic deploy-on-commit, and ensure your projects are always up-to-date.