k8w-super-promise/index.cjs

Promise with cancel and always

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

require('core-js/es/promise/finally');

/**
 * @author k8w
 * email: me@k8w.io
 */
var SuperPromise = /** @class */ (function () {
    function SuperPromise(executor) {
        var _this = this;
        this[Symbol.toStringTag] = 'SuperPromise';
        /** have been rs or rj */
        this.isCompleted = false;
        this.isAborted = false;
        this._promise = new Promise(function (rs, rj) {
            //重新定义resolve
            var newRs = function (value) {
                if (_this.isAborted) {
                    return;
                }
                _this.isCompleted = true;
                rs(value);
            };
            //重新定义reject
            var newRj = function (err) {
                if (_this.isAborted) {
                    return;
                }
                _this.isCompleted = true;
                rj(err);
            };
            executor(newRs, newRj);
        });
    }
    /**
     * 立即取消该Promise
     * 如果取消成功或之前已经取消，则返回true
     * 如果取消失败（已经resolve或reject），则返回false
     */
    SuperPromise.prototype.abort = function () {
        var _a;
        if (this.isCompleted) {
            return false;
        }
        if (this.isAborted) {
            return true;
        }
        //abort handler
        this.isAborted = true;
        (_a = this.onAbort) === null || _a === void 0 ? void 0 : _a.call(this);
        return true;
    };
    SuperPromise.prototype.then = function (onfulfilled, onrejected) {
        this._promise = this._promise.then(onfulfilled, onrejected);
        return this;
    };
    SuperPromise.prototype["catch"] = function (onrejected) {
        this._promise = this._promise["catch"](onrejected);
        return this;
    };
    SuperPromise.prototype["finally"] = function (onfinally) {
        this._promise = this._promise["finally"](onfinally);
        return this;
    };
    return SuperPromise;
}());

exports.SuperPromise = SuperPromise;