bc518174
 王天杨
提交两个项目文件
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function noop() {}
const localStorageManager = ({
key,
storageWindow
}) => {
if (!storageWindow && typeof window !== 'undefined') {
storageWindow = window;
}
return {
get(defaultValue) {
if (typeof window === 'undefined') {
return undefined;
}
if (!storageWindow) {
return defaultValue;
}
let value;
try {
value = storageWindow.localStorage.getItem(key);
} catch {
// Unsupported
}
return value || defaultValue;
},
set: value => {
if (storageWindow) {
try {
storageWindow.localStorage.setItem(key, value);
} catch {
// Unsupported
}
}
},
subscribe: handler => {
if (!storageWindow) {
return noop;
}
const listener = event => {
const value = event.newValue;
if (event.key === key) {
handler(value);
}
};
storageWindow.addEventListener('storage', listener);
return () => {
storageWindow.removeEventListener('storage', listener);
};
}
};
};
export default localStorageManager;
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