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app.js
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app.js
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const log = console.log
const outputElement = document.getElementById('output')
const clearBtn = document.getElementById('clear')
console.log = function () {
const len = arguments.length
let buffer = ''
for (let i = 0; i < len; i++) {
let arg = arguments[i]
let argType = typeof arg
let className = argType
let outputString = ''
if (argType === 'undefined') {
outputString = 'undefined'
} else if (Array.isArray(arg)) {
outputString = JSON.stringify(arg)
} else if (argType === 'object') {
outputString = JSON.stringify(arg, null, 2)
} else {
outputString = arg.toString()
}
if (arg === null) {
className += ' null'
}
buffer += `<pre class="output-column ${className}">${outputString}</pre>`
}
outputElement.innerHTML += `<div class="output-line">${buffer}</div>`
log.apply(this, arguments)
}
clearBtn.onclick = function () {
outputElement.innerHTML = ''
}
window.console.log = console.log