| 1 |
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| 2 |
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| 3 | const toLowerCase = key => {
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| 4 | if (typeof key === 'string') {
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| 5 | return key.toLowerCase()
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| 6 | }
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| 7 | return key
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| 8 | }
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| 9 |
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| 10 | module.exports = (initial = {}) => {
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| 11 | const headers = new Proxy({}, {
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| 12 | get (that, header) {
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| 13 | return that[toLowerCase(header)]
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| 14 | },
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| 15 |
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| 16 | set (that, header, value) {
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| 17 | that[toLowerCase(header)] = value
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| 18 | return true
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| 19 | }
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| 20 | })
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| 21 | Reflect.ownKeys(initial).forEach(header => {
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| 22 | headers[header] = initial[header]
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| 23 | })
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| 24 | return headers
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| 25 | }
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