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feat: Added strict CSP mode that uses CSS-only
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‎README.md‎

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@@ -67,6 +67,48 @@ const App = () => {
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};
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```
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## Content Security Policy (CSP)
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react-hot-toast supports strict Content Security Policies through an opt-in strict CSP mode.
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### Default Mode
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By default, react-hot-toast uses inline styles for maximum flexibility. This requires `style-src 'unsafe-inline'` in your CSP.
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### Strict CSP Mode
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For applications with strict CSP that disallow inline styles, enable strict CSP mode:
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```jsx
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import toast, { Toaster } from 'react-hot-toast';
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<Toaster strictCSP={true} />
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```
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In strict CSP mode:
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- All inline `style` props are ignored
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- Styling must be done via CSS classes and CSS variables
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- Toast positioning uses CSS flexbox instead of inline transforms
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- Fully compatible with CSP `style-src 'nonce-...'` directives
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The library uses [goober](https://github.com/cristianbote/goober) for styling, which supports CSP nonces through multiple methods:
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**Using `setNonce()`:**
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```js
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import { setNonce } from 'goober';
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setNonce('your-nonce-here');
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```
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**Vite convention:**
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```html
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<meta property="csp-nonce" nonce="your-nonce-here" />
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```
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**Webpack convention:**
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Set `window.__webpack_nonce__` in your entry script (see [webpack CSP guide](https://webpack.js.org/guides/csp/)).
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Make sure your CSP includes `style-src 'nonce-your-nonce-here'` and `script-src 'nonce-your-nonce-here'`.
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## Documentation
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Find the full API reference on [official documentation](https://react-hot-toast.com/docs).

‎site/pages/docs/styling.mdx‎

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@@ -128,3 +128,41 @@ import { Toaster, ToastBar } from 'react-hot-toast';
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)}
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</Toaster>;
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```
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## Strict CSP Mode
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For applications with strict Content Security Policies that disallow inline styles, enable `strictCSP` mode:
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```jsx
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<Toaster strictCSP={true} />
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```
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In strict CSP mode:
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- All inline `style` props are ignored
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- Styling must be done via CSS classes and CSS variables
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- Toast positioning uses CSS flexbox instead of inline transforms
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- The library is fully compatible with CSP `style-src 'nonce-...'` directives
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### Styling with CSS Variables (Strict CSP)
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When using strict CSP mode, use CSS variables for theming:
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```css
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:root {
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/* Success toasts */
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--rht-success-bg: #ecfdf5;
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--rht-success-fg: #065f46;
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/* Error toasts */
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--rht-error-bg: #fef2f2;
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--rht-error-fg: #991b1b;
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/* Loading toasts */
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--rht-loading-bg: #eff6ff;
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--rht-loading-fg: #1e40af;
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/* Blank toasts */
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--rht-blank-bg: #fff;
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--rht-blank-fg: #363636;
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}
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```

‎src/components/toast-bar.tsx‎

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import * as React from 'react';
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import { styled, keyframes } from 'goober';
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import { styled } from 'goober';
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import { Toast, ToastPosition, resolveValue, Renderable } from '../core/types';
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import { ToastIcon } from './toast-icon';
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import { prefersReducedMotion } from '../core/utils';
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const enterAnimation = (factor: number) => `
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0% {transform: translate3d(0,${factor * -200}%,0) scale(.6); opacity:.5;}
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100% {transform: translate3d(0,0,0) scale(1); opacity:1;}
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`;
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const exitAnimation = (factor: number) => `
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0% {transform: translate3d(0,0,-1px) scale(1); opacity:1;}
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100% {transform: translate3d(0,${factor * -150}%,-1px) scale(.6); opacity:0;}
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`;
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const fadeInAnimation = `0%{opacity:0;} 100%{opacity:1;}`;
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const fadeOutAnimation = `0%{opacity:1;} 100%{opacity:0;}`;
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// Use :where() for zero specificity - allows Tailwind to override easily
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const ToastBarBase = styled('div')`
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:where(&) {
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padding: 8px 10px;
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border-radius: 8px;
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}
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@keyframes rht-enter-from-top {
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0% { transform: translate3d(0, -200%, 0) scale(.6); opacity: .5; }
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100% { transform: translate3d(0, 0, 0) scale(1); opacity: 1; }
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}
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@keyframes rht-enter-from-bottom {
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0% { transform: translate3d(0, 200%, 0) scale(.6); opacity: .5; }
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100% { transform: translate3d(0, 0, 0) scale(1); opacity: 1; }
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}
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@keyframes rht-exit-to-top {
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0% { transform: translate3d(0, 0, -1px) scale(1); opacity: 1; }
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100% { transform: translate3d(0, -150%, -1px) scale(.6); opacity: 0; }
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}
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@keyframes rht-exit-to-bottom {
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0% { transform: translate3d(0, 0, -1px) scale(1); opacity: 1; }
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100% { transform: translate3d(0, 150%, -1px) scale(.6); opacity: 0; }
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}
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@keyframes rht-fade-in {
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0% { opacity: 0; }
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100% { opacity: 1; }
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}
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@keyframes rht-fade-out {
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0% { opacity: 1; }
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100% { opacity: 0; }
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}
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&.rht-enter-from-top {
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animation: rht-enter-from-top 0.35s cubic-bezier(.21,1.02,.73,1) forwards;
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}
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&.rht-enter-from-bottom {
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animation: rht-enter-from-bottom 0.35s cubic-bezier(.21,1.02,.73,1) forwards;
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}
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&.rht-exit-to-top {
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animation: rht-exit-to-top 0.4s forwards cubic-bezier(.06,.71,.55,1);
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}
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&.rht-exit-to-bottom {
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animation: rht-exit-to-bottom 0.4s forwards cubic-bezier(.06,.71,.55,1);
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}
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&.rht-fade-in {
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animation: rht-fade-in 0.35s cubic-bezier(.21,1.02,.73,1) forwards;
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}
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&.rht-fade-out {
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animation: rht-fade-out 0.4s forwards cubic-bezier(.06,.71,.55,1);
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}
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&.rht-invisible {
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opacity: 0;
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}
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&.rht-success {
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background: var(--rht-success-bg, #ecfdf5);
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color: var(--rht-success-fg, #065f46);
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}
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&.rht-error {
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background: var(--rht-error-bg, #fef2f2);
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color: var(--rht-error-fg, #991b1b);
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}
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&.rht-loading {
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background: var(--rht-loading-bg, #fff);
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color: var(--rht-loading-fg, #363636);
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}
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&.rht-blank {
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background: var(--rht-blank-bg, #fff);
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color: var(--rht-blank-fg, #363636);
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}
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`;
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const Message = styled('div')`
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}) => Renderable;
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}
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const getAnimationStyle = (
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const getAnimationClass = (
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position: ToastPosition,
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visible: boolean
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): React.CSSProperties => {
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visible: boolean,
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hasHeight: boolean
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): string => {
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if (!hasHeight) {
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return 'rht-invisible';
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}
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const top = position.includes('top');
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const factor = top ? 1 : -1;
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const reduced = prefersReducedMotion();
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const [enter, exit] = prefersReducedMotion()
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? [fadeInAnimation, fadeOutAnimation]
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: [enterAnimation(factor), exitAnimation(factor)];
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if (reduced) {
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return visible ? 'rht-fade-in' : 'rht-fade-out';
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}
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if (visible) {
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return top ? 'rht-enter-from-top' : 'rht-enter-from-bottom';
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}
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return {
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animation: visible
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? `${keyframes(enter)} 0.35s cubic-bezier(.21,1.02,.73,1) forwards`
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: `${keyframes(exit)} 0.4s forwards cubic-bezier(.06,.71,.55,1)`,
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};
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return top ? 'rht-exit-to-top' : 'rht-exit-to-bottom';
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};
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export const ToastBar: React.FC<ToastBarProps> = React.memo(
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({ toast, position, style, children }) => {
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const animationStyle: React.CSSProperties = toast.height
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? getAnimationStyle(
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toast.position || position || 'top-center',
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toast.visible
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)
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: { opacity: 0 };
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const animationClass = getAnimationClass(
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toast.position || position || 'top-center',
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toast.visible,
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!!toast.height
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);
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const icon = <ToastIcon toast={toast} />;
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const message = (
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</Message>
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);
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const className = [
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toast.className,
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animationClass,
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toast.type ? `rht-${toast.type}` : null,
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]
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.filter(Boolean)
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.join(' ');
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return (
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<ToastBarBase
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className={toast.className}
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className={className}
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style={{
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...animationStyle,
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...style,
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...toast.style,
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}}

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