luobotang’s gists

luobotang / babel.config.js

Created February 20, 2019 08:37

DEMO - Error of assign to read only 'exports' of object - caused by webpack and @babel/preset-env with special config

luobotang / get-mysql-db-tables-columns.js

Last active January 28, 2019 09:09

	function generateSql(db) {
	return `
	SELECT
	t.table_name,
	c.column_name,
	c.data_type
	FROM
	INFORMATION_SCHEMA.TABLES t JOIN
	INFORMATION_SCHEMA.COLUMNS c ON
	t.table_schema = c.table_schema AND

luobotang / cmd-text-format.js

Created November 15, 2017 08:56

控制台文本格式化工具

	var colors = ['black', 'red', 'green', 'yellow', 'blue', 'magenta', 'cyan', 'white']

	function F(text) {
	this.text = text
	this.attr = 0
	this._color = 0
	this._bgColor = 0
	}

	F.prototype.toString = function() {

luobotang / pageshow-demo.html

Last active May 3, 2018 08:02

pageshow demo

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=1, initial-scale=1.0">
	<meta http-equiv="X-UA-Compatible" content="ie=edge">
	<title>BFCache & pageshow</title>
	</head>
	<body>
	<a href="https://www.baidu.com/">leave to baidu.com</a>

luobotang / scrollElementIntoView

Created October 25, 2017 10:38

将元素移动到屏幕可见范围内

	function scrollElementIntoView(el, offsetTop) {
	var doc = document.documentElement
	var docScrollTop = doc.scrollTop \|\| 0
	var viewportHeight = window.innerHeight
	var rect = el.getBoundingClientRect()
	if (rect.top < 0 \|\| rect.top + rect.height > docScrollTop + viewportHeight) {
	var elOffsetTop = (rect.top + docScrollTop)
	var newScrollTop = elOffsetTop - (offsetTop > 0 ? offsetTop : (rect.height > viewportHeight ? 0 : (viewportHeight - rect.height) / 2))
	doc.scrollTop = newScrollTop
	}

luobotang / dispatchCustomEvent.js

Created August 23, 2017 08:22

DispatchCustomEvent

	function dispatchCustomEvent(name, data) {
	var e;
	if (window.CustomEvent) {
	e = new window.CustomEvent(name, {
	canBubble: true,
	cancelable: true,
	detail: data
	})
	} else {
	e = document.createEvent('CustomEvent');

luobotang / Image_Drag_Preview.html

Created August 23, 2017 06:51

Image_Drag_Preview

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<meta http-equiv="X-UA-Compatible" content="ie=edge">
	<title>Image Drag Preview</title>
	<style>
	* { margin: 0; padding: 0; }
	#box { padding: 10px; min-height: 500px; background: #f0f0f0; }

luobotang / AutoScroll.js

Created June 9, 2014 13:38

AutoScroll

	// 自动滚动
	// div#demo style:overflow:hidden
	// div#demo1
	// div#demo2
	var SPEED = 60,
	demo2 = document.getElementById("demo2"),
	demo1 = document.getElementById("demo1"),
	demo = document.getElementById("demo");

	function Marquee() {

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