101 lines
2.5 KiB
JavaScript
101 lines
2.5 KiB
JavaScript
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var serialize = null
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try {
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serialize = require('dom-serialize')
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} catch (e) {
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// Ignore failure on IE8
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}
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var instanceOf = require('./util').instanceOf
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function isNode (obj) {
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return (obj.tagName || obj.nodeName) && obj.nodeType
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}
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function stringify (obj, depth) {
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if (depth === 0) {
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return '...'
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}
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if (obj === null) {
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return 'null'
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}
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switch (typeof obj) {
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case 'symbol':
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return obj.toString()
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case 'string':
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return "'" + obj + "'"
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case 'undefined':
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return 'undefined'
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case 'function':
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try {
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// function abc(a, b, c) { /* code goes here */ }
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// -> function abc(a, b, c) { ... }
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return obj.toString().replace(/\{[\s\S]*\}/, '{ ... }')
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} catch (err) {
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if (err instanceof TypeError) {
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// Support older browsers
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return 'function ' + (obj.name || '') + '() { ... }'
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} else {
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throw err
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}
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}
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case 'boolean':
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return obj ? 'true' : 'false'
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case 'object':
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var strs = []
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if (instanceOf(obj, 'Array')) {
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strs.push('[')
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for (var i = 0, ii = obj.length; i < ii; i++) {
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if (i) {
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strs.push(', ')
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}
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strs.push(stringify(obj[i], depth - 1))
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}
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strs.push(']')
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} else if (instanceOf(obj, 'Date')) {
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return obj.toString()
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} else if (instanceOf(obj, 'Text')) {
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return obj.nodeValue
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} else if (instanceOf(obj, 'Comment')) {
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return '<!--' + obj.nodeValue + '-->'
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} else if (obj.outerHTML) {
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return obj.outerHTML
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} else if (isNode(obj)) {
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if (serialize) {
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return serialize(obj)
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} else {
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return 'Skipping stringify, no support for dom-serialize'
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}
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} else if (instanceOf(obj, 'Error')) {
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return obj.toString() + '\n' + obj.stack
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} else {
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var constructor = 'Object'
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if (obj.constructor && typeof obj.constructor === 'function') {
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constructor = obj.constructor.name
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}
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strs.push(constructor)
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strs.push('{')
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var first = true
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for (var key in obj) {
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if (Object.prototype.hasOwnProperty.call(obj, key)) {
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if (first) {
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first = false
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} else {
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strs.push(', ')
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}
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strs.push(key + ': ' + stringify(obj[key], depth - 1))
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}
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}
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strs.push('}')
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}
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return strs.join('')
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default:
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return obj
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}
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}
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module.exports = stringify
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