react-uncached-image
Version:
React image component that bypasses caching using query param cache busting.
69 lines (68 loc) • 2.95 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
var __rest = (this && this.__rest) || function (s, e) {
var t = {};
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
t[p] = s[p];
if (s != null && typeof Object.getOwnPropertySymbols === "function")
for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {
if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))
t[p[i]] = s[p[i]];
}
return t;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.UncachedImage = void 0;
const React = __importStar(require("react"));
/**
* See documentation: [UncachedImage](https://justinmahar.github.io/react-uncached-image/?path=/story/docs-uncachedimage--docs)
*
* An UncachedImage adds a cache-busting query param to your image `src` to ensure the browser requests the image from the server on every render.
*/
function UncachedImage(_a) {
var { cacheBuster } = _a, imgProps = __rest(_a, ["cacheBuster"]);
let src = imgProps.src;
if (typeof src === 'string') {
cacheBuster = cacheBuster !== null && cacheBuster !== void 0 ? cacheBuster : randChars(10);
const paramSymbol = src.indexOf('?') >= 0 ? '&' : '?';
src = `${src}${paramSymbol}${encodeURIComponent(cacheBuster)}`;
}
return React.createElement("img", Object.assign({}, imgProps, { src: src, alt: imgProps.alt }));
}
exports.UncachedImage = UncachedImage;
/**
* Generate a string of random alphanumeric characters, of the length provided.
*
* @param length The length of the string.
*/
const randChars = (length) => {
let result = '';
const characters = 'abcdefghijklmnopqrstuvwxyz0123456789';
const charactersLength = characters.length;
for (let i = 0; i < length; i++) {
result += characters.charAt(Math.floor(Math.random() * charactersLength));
}
return result;
};