Price Alert Dialog Block for React

So you can see it without a click. On load the dialog is a copy drawn in place over the page: a native dialog element that isn't modal, so nothing is trapped, hidden or focused, and the page around the preview keeps working. The Set price alert button opens the real Dialog, modal, with its focus trap, Escape and focus return, and the copy stays closed until a reload. Both show the same AlertFields component and share the block's state, so a target typed in the copy is there in the real one. In your app keep the Dialog and drop the copy: the "in-place" state, the scrim and the dialog element inside the frame.

From DAILY, 30 typed prices in whole dollars with today's last, mapped to percentages of a fixed scale from $200 to $280 and drawn as one SVG path with a lighter area under it; the target line and the dots are plain boxes placed by CSS variables, so they move with a transition that reduced motion switches off. No chart library is used. The chart is decorative and hidden from assistive technology, and its caption carries the same facts in text: the low, the high and today's price, then the sentence that counts the days. Swap DAILY for your own series and keep the scale in step.

By firesOf, a pure function of the target, the direction and the prices: a day counts when its price meets the target (at or below for a drop, at or above for a rise) and the day before did not, so a long run below the target is one alert, not many. Change the target or the direction and the dots, the line and the sentence all follow, and the new sentence is spoken about 600 ms after you stop, only when its text changed.

The target must be a price like 219 or 219.50; for a drop it must be under today's price and for a rise over it, and the message says so ("Choose a price under today's $249.00."). At least one of email and push must be on. Each message sits in a slot that is always there, with an icon, so the chart and the form never move; once it shows it follows your typing and clears as soon as it is fixed, and pressing Create alert with a problem keeps the dialog open and puts focus on the field it belongs to.

No. Create alert keeps the target, direction, channels and days in this tab, closes the dialog, fills the drawn bell, writes Alert at $219 on the page and says in a polite status message that nothing is watched and nothing will be sent; opening it again shows the alert you made, ready to update. In your app post the alert to your server in create, let a job compare each new price with it, and send the email or push from there, ending it when the days run out.

Yes. The real dialog is named by its title and described by its sentence, focus starts in the target field and stays inside until it closes, and Escape, Cancel and the close button all return focus to the header button. The trigger is passed to DialogTrigger through render, and the dialog is controlled with open and onOpenChange. The direction is a group you move through with the arrow keys, the two ways to hear are ordinary checkboxes in a fieldset, and the days are a native select. The copy shown on load moves no focus; Escape inside it, Cancel and its close button close it and put focus on the header button.