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July 6, 2018 15:20
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jsonを整形するブックマークレット
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javascript:( | |
() => { | |
const doneId = 'json-formatter-hogashi'; | |
if (document.querySelector(`#${doneId}`)) { | |
return; | |
} | |
/* EDIT HERE: `elem` is the element which has one-lined-JSON text */ | |
const elem = document.querySelector('pre'); | |
let str = elem.innerHTML, | |
formatted = '', | |
cursor = 0, | |
bigp = 0, | |
midp = 0; | |
const newLineWithSpace = num => { | |
let nlsp = '\n'; | |
for (let i = 0; i < num; i++) { | |
nlsp += ' '; | |
} | |
return nlsp; | |
}; | |
const length = str.length; | |
while (cursor < length) { | |
switch (str[cursor]) { | |
case '{': | |
formatted += '{' + newLineWithSpace((bigp + ++midp) * 2); | |
cursor++; | |
break; | |
case '[': | |
formatted += '[' + newLineWithSpace((++bigp + midp) * 2); | |
cursor++; | |
break; | |
case '"': | |
const [quoted] = str.slice(cursor).match(/"(?:\\\\|((?<!\\)\\(?!("|\\)))|[^\\"]|\\")*?"/); | |
formatted += quoted; | |
cursor += quoted.length; | |
break; | |
case ',': | |
formatted += ',' + newLineWithSpace((bigp + midp) * 2); | |
cursor++; | |
break; | |
case ':': | |
formatted += ': '; | |
cursor++; | |
break; | |
case '}': | |
formatted += newLineWithSpace((bigp + --midp) * 2) + '}'; | |
cursor++; | |
break; | |
case ']': | |
formatted += newLineWithSpace((--bigp + midp) * 2) + ']'; | |
cursor++; | |
break; | |
default: | |
formatted += str[cursor]; | |
cursor++; | |
break; | |
} | |
} | |
elem.innerHTML = formatted; | |
document.querySelector('body').insertAdjacentHTML('beforeend', `<div id="${doneId}" style="display: none;"></div>`) | |
})(); |
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