Newsletter — Dark Premium

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231

import type { FormEvent } from "react";
import { useId, useState } from "react";

/**
 * DevSnips React Newsletter — Dark Premium direction (editorial split).
 *
 * An asymmetric 4/8 editorial split on a permanently dark canvas
 * (§4.3, §10.2): the oversized heading block — eyebrow, title, lede —
 * sits left with a ruled metadata list; the signup form sits right inside a
 * single raised panel, one elevation step above the canvas with a 1px
 * border and no shadow. Restrained accent: the subscribe button and one
 * data highlight (the readers figure). No glow, no mesh, no gradients.
 *
 * The section pins `data-theme="dark"` on its own root, so it consumes the
 * same semantic tokens in both page themes — a theme mapping, not a
 * hard-coded dark page. Form behavior matches the Minimal direction exactly:
 * native label/email/required/autocomplete, visible error (`aria-invalid`
 * + `role="alert"`), an announced success state (`role="status"`),and an
 * overridable `onSubmit` — nothing reloads,and nothing leaves the page.

 * Metadata values are neutral sample figures (readers, frequency, focus),
 * clearly overridable props rather than fabricated social-proof claims.

 */

export type NewsletterSubmitResult = {
  success: boolean;
  message?: string;
};

export interface NewsletterStat {
  value: string;
  label: string;
  accent?: boolean;
}

export interface NewsletterSectionProps {
  eyebrow?: string;
  title?: string;
  description?: string;
  emailLabel?: string;
  emailPlaceholder?: string;
  buttonLabel?: string;
  privacyText?: string;
  panelCaption?: string;
  stats?: NewsletterStat[];
  onSubmit?: (email: string) => NewsletterSubmitResult | void;
}

const FOCUS_RING =
  "focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-[var(--ds-color-focus-ring)]";

const INPUT_CLASSES =
  "h-11 w-full min-w-0 rounded-[var(--ds-radius-sm)] border border-[var(--ds-color-border)] bg-[var(--ds-color-input)] px-4 text-sm leading-5 text-[var(--ds-color-foreground)] placeholder-[var(--ds-color-muted-foreground)] transition-colors duration-150 ease-out hover:border-[var(--ds-color-border-strong)] focus:border-[var(--ds-color-focus-ring)] motion-reduce:transition-none " +
  FOCUS_RING;

const ERROR_INPUT_CLASSES =
  "border-[var(--ds-color-destructive)] focus:border-[var(--ds-color-destructive)]";

const BUTTON_CLASSES =
  "inline-flex h-11 w-full shrink-0 items-center justify-center rounded-[var(--ds-radius-sm)] bg-[var(--ds-color-primary)] px-5 text-sm font-semibold leading-5 text-[var(--ds-color-primary-foreground)] transition-colors duration-150 ease-out hover:bg-[color-mix(in_srgb,var(--ds-color-primary)_88%,#000)] motion-reduce:transition-none " +
  FOCUS_RING;

const EMAIL_PATTERN = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;

const DEFAULT_STATS: NewsletterStat[] = [
  { value: "24k+", label: "Readers" },
  { value: "Twice monthly", label: "One essay, one dispatch" },
  { value: "Frontend + product engineering", label: "Built by shipping teams" },
];

export function NewsletterSection({
  eyebrow = "The DevSnips Dispatch",
  title = "Design notes from the front lines.",
  description = "One practical essay every other week — render performance, accessible components, and the systems thinking that ships both. No feed, no noise.",
  emailLabel = "Email address",
  emailPlaceholder = "you@example.com",
  buttonLabel = "Subscribe",
  privacyText = "Unsubscribe anytime. We never share your address.",
  panelCaption = "The Dispatch",
  stats = DEFAULT_STATS,
  onSubmit,
}: NewsletterSectionProps) {
  const headingId = useId();
  const inputId = `${headingId}-email`;
  const errorId = `${headingId}-error`;
  const statusId = `${headingId}-status`;
  const [email, setEmail] = useState("");
  const [error, setError] = useState<string | null>(null);
  const [submitted, setSubmitted] = useState(false);

  function handleSubmit(event: FormEvent<HTMLFormElement>) {
    event.preventDefault();
    const value = email.trim();
    if (!value) {
      setError("Enter your email address to subscribe.");
      setSubmitted(false);
      return;
    }
    if (!EMAIL_PATTERN.test(value)) {
      setError("Enter a valid email address — e.g. you@example.com.");
      setSubmitted(false);
      return;
    }
    setError(null);
    setSubmitted(true);
    if (onSubmit) {
      void onSubmit(value);
    }
  }

  return (
    <section
      data-theme="dark"
      aria-labelledby={headingId}
      className="bg-[var(--ds-color-background)] font-[var(--ds-font-sans)] text-[var(--ds-color-foreground)]"
    >
      <div className="mx-auto max-w-[1280px] px-4 py-[clamp(4rem,3rem+4vw,6rem)] sm:px-6 lg:px-8">
        <div className="grid grid-cols-1 gap-10 lg:grid-cols-12 lg:gap-12">
          <div className="lg:col-span-4">
            <p className="text-xs font-semibold uppercase leading-[1.3] tracking-[0.05em] text-[var(--ds-color-muted-foreground)]">
              <span aria-hidden="true" className="mr-2 text-[var(--ds-color-accent)]">—</span>
              {eyebrow}
            </p>
            <h2
              id={headingId}
              className="mt-4 text-[clamp(1.875rem,1.65rem+1vw,2.25rem)] font-semibold leading-[1.15] tracking-[-0.02em]"
            >
              {title}
            </h2>
            <p className="mt-5 text-[clamp(1rem,0.95rem+0.25vw,1.125rem)] leading-[1.5] text-[var(--ds-color-muted-foreground)]">
              {description}
            </p>

            <dl className="mt-10 divide-y divide-[var(--ds-color-border-subtle)] border-t border-[var(--ds-color-border-subtle)] lg:mt-12">
              {stats.map((stat) => (
                <div
                  key={stat.label}
                  className="flex items-baseline justify-between gap-4 py-4"
                >
                  <dt className="text-sm leading-5 text-[var(--ds-color-muted-foreground)]">
                    {stat.label}
                  </dt>
                  <dd
                    className={
                      "text-right font-[var(--ds-font-mono)] text-sm font-medium leading-5 tabular-nums " +
                      (stat.accent
                        ? "text-[var(--ds-color-accent)]"
                        : "text-[var(--ds-color-foreground)]")
                    }
                  >
                    {stat.value}
                  </dd>
                </div>
              ))}
            </dl>
          </div>

          <div className="lg:col-span-8">
            <div className="rounded-[var(--ds-radius-md)] border border-[var(--ds-color-border)] bg-[var(--ds-color-surface)] p-6 lg:p-8">
              <p className="font-[var(--ds-font-mono)] text-xs font-medium uppercase leading-[1.4] tracking-[0.05em] text-[var(--ds-color-muted-foreground)]">
                {panelCaption}
              </p>
              <form
                onSubmit={handleSubmit}
                noValidate
                className="mt-6"
              >
                <div className="grid grid-cols-1 gap-3 sm:grid-cols-[1fr_auto]">
                  <div className="min-w-0">
                    <label
                      htmlFor={inputId}
                      className="sr-only"
                    >
                      {emailLabel}
                    </label>
                    <input
                      id={inputId}
                      type="email"
                      name="email"
                      autoComplete="email"
                      required
                      placeholder={emailPlaceholder}
                      value={email}
                      onChange={(event) => setEmail(event.target.value)}
                      aria-invalid={error ? true : undefined}
                      aria-describedby={error ? errorId : undefined}
                      className={INPUT_CLASSES + (error ? " " + ERROR_INPUT_CLASSES : "")}
                    />
                  </div>
                  <button type="submit" className={BUTTON_CLASSES}>
                    {buttonLabel}
                  </button>
                </div>

                <p
                  id={errorId}
                  role="alert"
                  className={
                    "mt-2 text-sm font-medium leading-5 text-[var(--ds-color-destructive)] " +
                    (error ? "" : "sr-only")
                  }
                >
                  {error ?? "There was a problem with your subscription."}
                </p>

                <div
                  id={statusId}
                  role="status"
                  aria-live="polite"
                  className={
                    "mt-4 flex items-center gap-2 text-sm font-medium leading-5 " +
                    (submitted
                      ? "text-[var(--ds-color-foreground)]"
                      : "sr-only")
                  }
                >
                  {submitted ? "Thanks — you are on the list." : ""}
                </div>

                <p className="mt-4 border-t border-[var(--ds-color-border-subtle)] pt-4 text-xs leading-[1.4] text-[var(--ds-color-muted-foreground)]">
                  {privacyText}
                </p>
              </form>
            </div>
          </div>
        </div>
      </div>
    </section>
  );
}