JSON.stringify() - Speaker Deck

JSON.stringify()

by Matsui Masashi

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JSON.stringify() @circled9 2019-09-13 Friday 13 JSON #12

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Matsui Masashi দҪਖ਼ࢤ DJSDMFE ϒϥ΢β͕޷͖ͳਓ !XBUFSDFMMJOD !3

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JSON.stringify()

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JSON.stringify() is … • JavaScriptͷؔ਺ • ΦϒδΣΫτΛJSONʹม׵͢Δ • JSONΦϒδΣΫτͷ࣋ͭؔ਺ͷதͰ3ຊͷࢦ ʹೖΔਓؾͷؔ਺

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arguments

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JSON.stringify(value[, replacer[, space]])

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arguments • value • any • replacer: optional • Array | function • space: optional • String | Number

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value

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value • JSONจࣈྻʹม׵͢Δ஋ɻ

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replacer

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replacer • ग़ྗ͢ΔJSONจࣈྻͷ੍ޚΛߦ͏ • Array • JSONจࣈྻʹؚΊΔϗϫΠτϦετ • Function: function(key, value) • JSONจࣈྻʹม׵͢Δ࣌ͷؔ਺

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space

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space • ग़ྗ͢ΔJSONจࣈྻͷۭനΛ੍ޚ͢Δ • Number • ۭനจࣈͷ਺ • String • ۭനͱͯ͠࢖༻͢Δจࣈྻ

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·ͱΊ

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·ͱΊ • JSON.stringify() ͸JSONΦϒδΣΫτͷؔ਺ ͷதͰ3ຊͷࢦʹೖΔਓؾͷؔ਺ • ୈ2Ҿ਺͕࣮͸ߴػೳ • Ͱ΋ɺ݁ہ JSON.stringify(obj, null, 2) Ҏ֎ ࢖͏͜ͱ͸΄ͱΜͲͳ͍