57 lines
1.5 KiB
JavaScript
57 lines
1.5 KiB
JavaScript
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/** @license MIT License (c) copyright 2010-2014 original author or authors */
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/** @author Brian Cavalier */
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/** @author John Hann */
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(function(define) { 'use strict';
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define(function() {
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return {
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formatError: formatError,
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formatObject: formatObject,
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tryStringify: tryStringify
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};
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/**
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* Format an error into a string. If e is an Error and has a stack property,
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* it's returned. Otherwise, e is formatted using formatObject, with a
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* warning added about e not being a proper Error.
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* @param {*} e
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* @returns {String} formatted string, suitable for output to developers
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*/
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function formatError(e) {
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var s = typeof e === 'object' && e !== null && e.stack ? e.stack : formatObject(e);
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return e instanceof Error ? s : s + ' (WARNING: non-Error used)';
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}
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/**
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* Format an object, detecting "plain" objects and running them through
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* JSON.stringify if possible.
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* @param {Object} o
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* @returns {string}
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*/
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function formatObject(o) {
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var s = String(o);
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if(s === '[object Object]' && typeof JSON !== 'undefined') {
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s = tryStringify(o, s);
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}
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return s;
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}
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/**
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* Try to return the result of JSON.stringify(x). If that fails, return
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* defaultValue
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* @param {*} x
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* @param {*} defaultValue
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* @returns {String|*} JSON.stringify(x) or defaultValue
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*/
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function tryStringify(x, defaultValue) {
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try {
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return JSON.stringify(x);
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} catch(e) {
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return defaultValue;
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}
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}
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});
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}(typeof define === 'function' && define.amd ? define : function(factory) { module.exports = factory(); }));
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