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function isMobile(agent) {
  return /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(agent);
};

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function escapeHtml(code) {
  var escapeMap = {
    "&": "&",
    "<": "&lt;",
    ">": "&gt;",
    '"': "&quot;",
    "'": "&#x27;",
    "`": "&#x60;"
  };
  var escaper = function (match) {

bh-lay

function preventDefault (event) {
	window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty()
	event.preventDefault && event.preventDefault()
	event.stopPropagation && event.stopPropagation()
}
function getParam(clientX, clientY, startX, startY) {
	let xOffset = clientX - startX
	let yOffset = clientY - startY

	return {

bh-lay

function getImgContainToRectConfig (outerWidth, outerHeight, imgWidth, imgHeight) => {
	let newWidth = outerWidth;
	let newHeight = outerWidth * imgHeight / imgWidth;
	if (newHeight > outerHeight) {
	  newHeight = outerHeight;
	  newWidth = outerHeight * imgWidth / imgHeight;
	}
	return {
		top: (outerHeight - newHeight) / 2,
		left: (outerWidth - newWidth) / 2,