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/** * 本质就是then,只是少传了一个onFulfilled * 所以仅处理失败的场景 * @param {*} onRejected */ Promise.prototype.catch = function(onRejected) { return this.then(null, onRejected); }
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Promise.prototype.catch = function (fn) { this.then(undefined, (err) => { fn(err); }); };
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Promise.prototype.catch = function () { return this.then(null, err => err); }
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The text was updated successfully, but these errors were encountered: