구차니의 잡동사니 모음

new Date(2010, 6, 26).getTime() / 1000

1970 년 1 월 1 일 00:00:00 UTC와 주어진 날짜 사이의 경과 시간 (밀리 초)을 나타내는 숫자입니다. 

var canvas = document.getElementById('canvas');

canvas.toBlob(function(blob) {

  var newImg = document.createElement('img'),

      url = URL.createObjectURL(blob);

  newImg.onload = function() {

    // no longer need to read the blob so it's revoked

    URL.revokeObjectURL(url);

  };

  newImg.src = url;

  document.body.appendChild(newImg);

}); 

var formData = new FormData();

formData.append('key1', 'value1');

formData.append('key2', 'value2');

// Display the key/value pairs

for (var pair of formData.entries()) {

    console.log(pair[0]+ ', ' + pair[1]); 

} 

var formData = new FormData();

formData.append('items', new Blob([JSON.stringify({

    name: "Book",

    quantity: "12"

})], {

    type: "application/json"

})); 

var st = imagepath.replace(data:image/png or jpg; base64"/""); 

function toHexString(byteArray) {

  return Array.from(byteArray, function(byte) {

    return ('0' + (byte & 0xFF).toString(16)).slice(-2);

  }).join('')

} 

<div class="jsmpeg" data-url="ws://localhost:6424" data-disable-gl="true"> 

Note that camelCased options have to be hyphenated when used as data attributes. E.g. decodeFirstFrame: true becomes data-decode-first-frame="true" for the HTML element.