56 lines
1.7 KiB
JavaScript
56 lines
1.7 KiB
JavaScript
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'use strict'
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/*
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This file is a reduced and adapted version of the main lib/internal/util/inspect.js file defined at
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https://github.com/nodejs/node/blob/main/lib/internal/util/inspect.js
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Don't try to replace with the original file and keep it up to date with the upstream file.
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*/
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module.exports = {
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format(format, ...args) {
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// Simplified version of https://nodejs.org/api/util.html#utilformatformat-args
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return format.replace(/%([sdifj])/g, function (...[_unused, type]) {
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const replacement = args.shift()
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if (type === 'f') {
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return replacement.toFixed(6)
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} else if (type === 'j') {
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return JSON.stringify(replacement)
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} else if (type === 's' && typeof replacement === 'object') {
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const ctor = replacement.constructor !== Object ? replacement.constructor.name : ''
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return `${ctor} {}`.trim()
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} else {
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return replacement.toString()
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}
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})
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},
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inspect(value) {
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// Vastly simplified version of https://nodejs.org/api/util.html#utilinspectobject-options
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switch (typeof value) {
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case 'string':
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if (value.includes("'")) {
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if (!value.includes('"')) {
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return `"${value}"`
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} else if (!value.includes('`') && !value.includes('${')) {
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return `\`${value}\``
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}
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}
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return `'${value}'`
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case 'number':
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if (isNaN(value)) {
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return 'NaN'
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} else if (Object.is(value, -0)) {
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return String(value)
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}
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return value
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case 'bigint':
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return `${String(value)}n`
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case 'boolean':
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case 'undefined':
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return String(value)
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case 'object':
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return '{}'
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}
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}
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}
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