@algolia/autocomplete-core
Version:
Core primitives for building autocomplete experiences.
62 lines • 1.91 kB
JavaScript
function createInternalCancelablePromise(promise, initialState) {
var state = initialState;
return {
then: function then(onfulfilled, onrejected) {
return createInternalCancelablePromise(promise.then(createCallback(onfulfilled, state, promise), createCallback(onrejected, state, promise)), state);
},
catch: function _catch(onrejected) {
return createInternalCancelablePromise(promise.catch(createCallback(onrejected, state, promise)), state);
},
finally: function _finally(onfinally) {
if (onfinally) {
state.onCancelList.push(onfinally);
}
return createInternalCancelablePromise(promise.finally(createCallback(onfinally && function () {
state.onCancelList = [];
return onfinally();
}, state, promise)), state);
},
cancel: function cancel() {
state.isCanceled = true;
var callbacks = state.onCancelList;
state.onCancelList = [];
callbacks.forEach(function (callback) {
callback();
});
},
isCanceled: function isCanceled() {
return state.isCanceled === true;
}
};
}
export function createCancelablePromise(executor) {
return createInternalCancelablePromise(new Promise(function (resolve, reject) {
return executor(resolve, reject);
}), {
isCanceled: false,
onCancelList: []
});
}
createCancelablePromise.resolve = function (value) {
return cancelable(Promise.resolve(value));
};
createCancelablePromise.reject = function (reason) {
return cancelable(Promise.reject(reason));
};
export function cancelable(promise) {
return createInternalCancelablePromise(promise, {
isCanceled: false,
onCancelList: []
});
}
function createCallback(onResult, state, fallback) {
if (!onResult) {
return fallback;
}
return function callback(arg) {
if (state.isCanceled) {
return arg;
}
return onResult(arg);
};
}