64 lines
1.2 KiB
JavaScript
64 lines
1.2 KiB
JavaScript
'use strict';
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// Make a value ready for JSON.stringify() / process.send()
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module.exports = function (value) {
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if (typeof value === 'object') {
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return destroyCircular(value, []);
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}
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// People sometimes throw things besides Error objects, so...
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if (typeof value === 'function') {
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// JSON.stringify discards functions. We do to, unless a function is thrown directly.
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return '[Function: ' + (value.name || 'anonymous') + ']';
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}
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return value;
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};
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// https://www.npmjs.com/package/destroy-circular
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function destroyCircular(from, seen) {
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var to;
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if (Array.isArray(from)) {
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to = [];
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} else {
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to = {};
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}
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seen.push(from);
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Object.keys(from).forEach(function (key) {
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var value = from[key];
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if (typeof value === 'function') {
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return;
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}
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if (!value || typeof value !== 'object') {
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to[key] = value;
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return;
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}
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if (seen.indexOf(from[key]) === -1) {
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to[key] = destroyCircular(from[key], seen.slice(0));
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return;
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}
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to[key] = '[Circular]';
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});
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if (typeof from.name === 'string') {
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to.name = from.name;
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}
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if (typeof from.message === 'string') {
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to.message = from.message;
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}
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if (typeof from.stack === 'string') {
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to.stack = from.stack;
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}
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return to;
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}
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